[Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.16"] [Round "1.1"] [White "Li, Ben"] [Black "Balakrishnan, Praveen"] [Result "0-1"] [ECO "D46"] [WhiteElo "2376"] [BlackElo "2507"] [Annotator "TA"] [PlyCount "66"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 21,66,0,18,7,18,0,0,0,70,48,49,52,53,-11,0,0,0,0,0,-2,10,-21,0,0,10, -124,-130,-114,-96,-654,-645,-764,-760,-725,-697,-1141,-1121,-29980,-1826, -29988,-905,-29989,-29990,-29990,-29991,-29990,-29991]} 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. a3 Bd6 10. O-O O-O 11. Qc2 Rc8 12. Rd1 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran.} c5 {12...a5 is vanishing.} (12... a5 {is more complex.} 13. Ne5 Qc7 14. Nxd7 Qxd7 15. f4 c5) 13. Bxb5 Bxf3 14. gxf3 {[#] The position is equal.} Bb8 $146 (14... cxd4 $11 15. Rxd4 (15. exd4 Nd5 $15) 15... Be5) ({Predecessor:} 14... cxd4 15. Rxd4 Be5 16. Rd1 Rc5 17. Qe2 Qb8 18. f4 Bxc3 19. Bxd7 Nxd7 20. Rxd7 Bf6 {1-0 (46) Nakamura,H (2775)-Navara,D (2724) Prague 2014}) 15. dxc5 $14 Rxc5 16. Bxd7 Nxd7 17. b4 ({White should play} 17. f4 $14) 17... Rg5+ 18. Kf1 Qc7 19. f4 Rh5 20. Kg1 Nf6 21. Bb2 Ng4 22. Qe2 f5 23. Qf3 (23. Qb5 $1 $11 Rg5 24. Kf1 Nxh2+ 25. Ke2) 23... Rxh2 $17 24. Rd2 Rh6 25. Rad1 $2 {[%mdl 8192] [#] This move loses the game for White.} (25. Ne2 $17) 25... Rg6 $1 $19 26. Kh1 Qe7 {And now ...Qh4+ would win.} 27. Qg3 Nf6 28. Qf3 Ne4 {( -> ...Qh4+)} 29. Kh2 Nxd2 (29... Qh4+ $142 30. Qh3 Bxf4+ 31. exf4 Qxf4+ {[%mdl 64] Double Attack} 32. Kh1 Rh6 33. Qxh6 Qxh6+ 34. Kg2 Nxd2 35. Rxd2 Qg5+ 36. Kh3 Qxd2 37. Kg2 f4 38. Kh3 Qxf2 39. Ne4 Qf1+ 40. Kg4 Qg2+ 41. Kh4 Rf5 42. Bd4 Qh2+ 43. Kg4 Qh5#) 30. Rxd2 Qh4+ 31. Qh3 Bxf4+ {Black mates.} 32. exf4 Qxf4+ {[%mdl 64] [#] Double Attack} 33. Kh1 Qxd2 {Weighted Error Value: White=1.53/Black=0.30} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.16"] [Round "1.2"] [White "Yoo, Christopher Woojin"] [Black "Hong, Andrew"] [Result "1-0"] [ECO "D43"] [WhiteElo "2479"] [BlackElo "2474"] [Annotator "TA"] [PlyCount "93"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 23,93,20,29,11,10,9,19,14,45,17,46,41,75,60,81,78,73,78,69,62,81,94,149, 170,164,156,151,148,151,143,192,135,163,163,140,171,169,168,163,170,175,126, 134,127,275,265,961,952,2539,2193,2168,1887,1339,1202,2487,2087,29977,29978, 29978,29979,29979,29980,29980,29981,5710,1900,1854,1812,1788,1843,1487,1251]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Bd3 g6 9. O-O Bg7 10. e4 dxc4 11. Bxc4 e5 12. d5 Nb6 13. Qb3 {D43: Semi-Slav: 5 Bg5 h6.} O-O 14. Rfd1 Bg4 15. Rd3 {[#] The position is equal.} Nd7 $146 { Threatens to win with ...Nc5.} ({Predecessor:} 15... Qe7 16. Nd2 Rad8 17. h3 cxd5 18. Nxd5 Nxd5 19. Bxd5 Be6 20. Bxe6 Rxd3 {1/2-1/2 (20) Novikov,A (2002) -Shchebenyuk,T (2055) ICCF email 2016}) 16. dxc6 bxc6 {...Nc5 is the strong threat.} 17. Na4 Rfb8 18. Qc2 Bf8 19. h3 Be6 20. Bxe6 Qxe6 21. b3 Bb4 22. Rc1 $36 {[%mdl 2048] White has strong initiative.} Nb6 (22... Ba3 $142) 23. Nc5 $16 ({Wrong is} 23. Qxc6 $2 Rc8 $19) 23... Qe7 24. Na6 Re8 25. Nxb4 (25. Qxc6 Rac8 $11) 25... Qxb4 26. Rc3 ({Don't go for} 26. Qxc6 $2 Rac8 $19) 26... Re6 27. Rd1 ({Worse is} 27. Rxc6 Rxc6 28. Qxc6 Rc8 $15) ({White should try} 27. Qd3 $18) 27... Rc8 28. Rc5 f6 29. Nh2 Rc7 30. Ng4 h5 31. Ne3 {Black must now prevent Nd5!} Nd7 32. Rc4 Qb7 33. Rc3 Nb6 {This costs Black the game.} (33... Nf8 $16 34. Rcd3 Re8) 34. Rd8+ Kg7 $2 {[#]} (34... Kf7 35. g4 h4) 35. Nf5+ $1 $18 { [%mdl 512]} Kh7 {[#]} (35... Kf7 36. Nd6+) 36. Qd2 $1 {[%csl Gf5][%CAl Rd2h6]} g5 37. Qe2 {[%CAl Re2h5]} Kg6 38. Rg8+ Kh7 {[#]} 39. Re8 $3 {[%mdl 576] Decoy} Rxe8 (39... Kg6 40. Rxe6) 40. Qxh5+ {[%mdl 64] Double Attack} Kg8 41. Qxe8+ Kh7 42. Qh5+ Kg8 43. Qg6+ Rg7 44. Nxg7 (44. Qxf6 $142 Qd7 {[#]} 45. Rd3 $3 { [%mdl 512]}) 44... Qxg7 45. Qxg7+ Kxg7 46. Rxc6 Kg6 47. Rc7 {Weighted Error Value: White=0.09/Black=0.44} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.16"] [Round "1.3"] [White "Wang, Justin"] [Black "Burke, John M"] [Result "1/2-1/2"] [ECO "D85"] [WhiteElo "2467"] [BlackElo "2538"] [Annotator "TA"] [PlyCount "91"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,91,19,26,31,20,19,21,0,72,60,82,61,70,43,60,21,14,17,15,22,18,0,135, 123,63,31,36,29,30,27,11,12,13,0,0,0,0,-26,66,0,30,46,38,45,35,21,33,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Nf3 Bg4 9. Rc1 O-O 10. Be2 { D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} Qa5 11. O-O Qxa2 {[#]} 12. h3 $146 ({Predecessor:} 12. Ra1 Qb2 13. Qd3 Qb6 14. Rfb1 Qc7 15. Qc4 b6 16. h3 Bd7 17. dxc5 bxc5 18. Qxc5 Qxc5 19. Bxc5 {1/2-1/2 (37) Le,Q (2714)-Vachier Lagrave,M (2780) Caleta 2019}) 12... Bd7 (12... Bxf3 $11 13. Bxf3 Rd8) 13. d5 $16 {[%mdl 1024] White has strong compensation.} c4 14. e5 Bf5 15. g4 Be4 16. Ng5 Bd3 {[%CAl Rd3e2]} 17. Bxd3 cxd3 18. Qxd3 {Black must now prevent Ra1.} Bxe5 19. Bc5 Qa4 (19... Qa6 $11 {keeps the balance.} 20. Qxa6 Nxa6 21. Bxe7 Rfe8) 20. Bxe7 Re8 21. d6 {Strongly threatening f4!} (21. f4 $5 Bxf4 {[#]} 22. Ra1 $1 $16) 21... Qf4 {[%csl Ge5][%CAl Rf4h2]} 22. Nf3 Bf6 23. Bxf6 Qxf6 24. Rce1 Nd7 25. g5 Qf4 26. Re7 Nc5 {[%CAl Rc5d3]} 27. Qd5 {aiming for Rxe8+.} Ne6 (27... Rxe7 $11 28. dxe7 Qc7) 28. Rb1 (28. Rxb7 $14 Rad8 29. Rd1 (29. Rxa7 $2 Rxd6 30. Qb7 Red8 $19) (29. d7 Re7 $16)) 28... Rxe7 29. dxe7 Re8 $1 {[%CAl Re8e7] [#]} 30. Qd7 Ng7 31. Kg2 b6 32. Rb4 Qf5 {[%CAl Rf5d7] The position is equal.} 33. Qxa7 Ne6 34. h4 Kg7 35. Kg3 {Hoping for Qd7.} Qc5 36. Qxb6 Qxc3 37. Qd6 (37. Qb5 {keeps more tension.} Qc7+ 38. Kg2 Rxe7 39. Rc4 Qb7 40. Qxb7 Rxb7 41. Nd4) 37... Qc5 38. Qxc5 Nxc5 $11 {[%mdl 4096] Endgame KRN-KRN } 39. h5 {h6+ is the strong threat.} (39. Rc4 {seems wilder.} Ne6 40. Ne5 Rxe7 41. Ng4 Rd7 42. f3) 39... Rxe7 40. h6+ Kf8 41. Rb5 Ne4+ 42. Kg2 Rc7 43. Rb4 f5 44. gxf6 Nxf6 45. Ng5 {And now Ne6+ would win.} Ke7 46. f3 {Weighted Error Value: White=0.10/Black=0.19} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.16"] [Round "1.4"] [White "Jacobson, Brandon"] [Black "Checa, Nicolas"] [Result "0-1"] [ECO "E14"] [WhiteElo "2504"] [BlackElo "2552"] [Annotator "TA"] [PlyCount "94"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 21,94,7,52,56,52,63,130,65,73,14,7,10,34,13,30,35,33,17,9,-124,-104, -104,-79,-96,-113,-87,-98,-179,-172,-157,-170,-402,-387,-386,-387,-476,-468, -443,-394,-377,-384,-427,0,-324,0,-420,-420,-445,-462,-469,-469,-462,-445,-355, -380,-463,-415,-468,-447,-464,-452,-495,-498,-475,-481,-472,-462,-545,-553, -521,-539,-659,-651,-600,-581]} 1. Nf3 d5 2. e3 Nf6 3. c4 e6 4. Nc3 Be7 5. b3 O-O 6. Bb2 b6 7. cxd5 exd5 8. d4 c5 9. Bd3 Nc6 10. dxc5 bxc5 11. O-O Bb7 12. Rc1 {E14: Queen's Indian: Classical Variation (4 e3).} Qa5 $5 {[%mdl 4] Leaves trodden paths.} 13. Na4 Ne4 {[#]} (13... d4 $14) 14. Bxe4 $146 (14. Nh4 $1 $16 {[%mdl 512]} c4 (14... Bxh4 15. Bxe4) 15. Bxe4 dxe4 16. Qd7 $1) ({Predecessor: } 14. Ne5 Nxe5 15. Bxe5 Rad8 16. Qc2 Rfe8 17. b4 cxb4 18. Bc7 b3 19. Qxb3 Qb4 20. Qxb4 Bxb4 21. Bxd8 Rxd8 {1-0 (29) Yurasova,D (2075)-Vasilevich,I (2258) Sochi 2020}) 14... dxe4 $14 {[#]} 15. Ne5 (15. Nh4 $1 $16 {And now Nf5 would win.} c4 16. Qd7 $1) 15... Nxe5 $11 16. Bxe5 {Qd7 is the strong threat.} c4 17. Bc3 Qg5 18. bxc4 Rad8 19. Qc2 Rd6 {[%CAl Bd8d6,Bd6g6,Bg6h6][%mdl 32]} 20. Qe2 ( 20. Rb1 $1 $11 Bc6 21. Bb4) 20... Rg6 {[%csl Gg6][%CAl Rg5g2][%mdl 1024] Black has strong compensation. Black continues to play with concentration.} 21. g3 Rh6 22. Rfd1 Bc8 $40 {[%mdl 128] Hoping for ...Bg4. Black attacks with force.} 23. Rd5 {[#]} Qg6 24. f4 (24. Qc2 $17 {was necessary.}) 24... exf3 $1 $19 25. Qxf3 Bb7 26. e4 $2 (26. Bd4) 26... Bxd5 27. exd5 Bg5 28. Rf1 Qc2 {[%csl Gh6, Ba2,Ba4,Bh2][%CAl Rc2h2]} 29. h4 Bf6 30. Qd1 Qg6 31. Qf3 Qc2 32. Qd1 Qg6 33. Qf3 {White hopes to continue with Bxf6.} Bxh4 34. Be5 Bg5 {Threatens to win with ...Qc2!} 35. Nc3 Qc2 {[%csl Gh6][%CAl Rc2h2]} 36. Rf2 Qc1+ 37. Rf1 Qd2 { [%csl Gh6][%CAl Rd2h2]} ({But not} 37... Be3+ 38. Kg2 $19) 38. Ne2 Ra6 39. a3 Be3+ {Black is clearly winning.} 40. Kh1 Bc5 41. Qg4 {[%csl Ge5][%CAl Rg4g7]} Rh6+ 42. Kg2 {[%csl Ge5][%CAl Rg4g7]} Rg6 43. Qf3 Ra6 44. Qg4 {[%csl Ge5][%CAl Rg4g7]} g6 45. Bc3 Qd3 {Strongly threatening ...Re8.} 46. Bb4 Bxb4 47. axb4 h5 {Weighted Error Value: White=0.37/Black=0.23} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.16"] [Round "1.5"] [White "Brodsky, David"] [Black "Niemann, Hans Moke"] [Result "1/2-1/2"] [ECO "C55"] [WhiteElo "2455"] [BlackElo "2571"] [Annotator "TA"] [PlyCount "84"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,84,36,38,12,36,12,25,33,33,-9,-16,-73,-65,-59,-13,-37,-6,-37,-4,-4, -4,-4,0,-14,-14,-14,16,11,9,8,11,8,7,8,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. a4 d5 7. exd5 Nxd5 8. Nbd2 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} Bg4 9. Re1 Kh8 10. h3 {White has an edge.} Bh5 11. Nf1 {[#]} Ndb4 $146 ({Predecessor:} 11... Nb6 12. Ba2 Bd6 13. Ng3 Bg6 14. c3 Qd7 15. Nh4 Rad8 16. Nxg6+ hxg6 17. Ne4 Be7 {1-0 (91) Andriasian,Z (2586) -Boruchovsky,A (2542) Chess.com INT 2018}) 12. Ne3 {[#]} (12. g4 $11 Bg6 13. Nxe5) 12... f5 $1 $17 13. c3 $1 {[#]} e4 $1 14. dxe4 fxe4 15. cxb4 (15. Qxd8 { looks sharper.} Raxd8 16. cxb4 exf3 17. Nd5 Bd6 18. g4) 15... Bxb4 16. Qxd8 { The position is equal.} Raxd8 17. Nc2 exf3 18. Nxb4 Nxb4 19. Bg5 Rc8 (19... Rd4 {keeps more tension.} 20. Rac1 fxg2 21. Be7 Rff4 22. Be2 Bxe2 23. Rxc7 h6) 20. Be7 Nc2 21. Bxf8 Rxf8 {[#]} 22. Re5 $1 {aiming for Rd1.} Nxa1 23. Rxh5 fxg2 $11 {[%mdl 4096] Endgame KRB-KRN} 24. Re5 c6 25. Re7 Rb8 26. Kxg2 Nc2 27. Kf3 a5 28. Ke4 Nb4 29. f4 g6 30. Be6 b5 31. axb5 Rxb5 32. Rd7 Rh5 33. f5 gxf5+ 34. Ke5 {White wants to mate with Kf6.} Nd5 35. Bxd5 {Intending Kf6 and mate.} f4+ 36. Kxf4 {Be6 is the strong threat.} cxd5 {KR-KR} 37. Kg4 Re5 38. Kf4 Re4+ 39. Kf5 Rd4 40. Kf6 {[%CAl Rd7d8]} Rf4+ $1 41. Kg5 Rd4 42. Kf6 {[%CAl Rd7d8]} Rf4+ $1 { Weighted Error Value: White=0.08/Black=0.05} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.17"] [Round "2.1"] [White "Hong, Andrew"] [Black "Jacobson, Brandon"] [Result "0-1"] [ECO "C78"] [WhiteElo "2474"] [BlackElo "2504"] [Annotator "TA"] [PlyCount "74"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,74,46,39,39,33,34,30,21,16,20,32,30,15,0,1,-25,21,18,29,0,0,0,0,0,0, 0,41,31,19,33,49,0,0,-25,-41,-169,-159,-357,-356,-822,-805,-1019,-654,-689, -647,-670,-660,-585,-578,-29971,-29974,-29974,-29974,-29974,-29975,-29972, -29974,-29974,-29975,-29975,-29974,-29951,-29954]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. c3 d6 8. d4 {C78: Ruy Lopez: Archangelsk and Möller Defences.} Ba7 9. Be3 O-O 10. Nbd2 {[#] White has an edge.} exd4 $146 ({Predecessor:} 10... Bg4 11. h3 Bh5 12. Bg5 Rb8 13. a4 Bg6 14. d5 Na5 15. Bc2 b4 16. Rb1 bxc3 17. bxc3 Rxb1 18. Bxb1 c6 19. c4 Qd7 20. Bxf6 gxf6 21. Kh2 Rb8 22. Qe2 Rb4 {0-1 (22) Jobava,B (2644)-Georgiev,V (2576) Heraklion 2007}) 11. cxd4 Bg4 12. h3 Bh5 13. g4 Bg6 14. Re1 d5 ({Worse is} 14... Nxe4 15. Bd5 $16) ({Wrong is} 14... Bxe4 $2 15. Nxe4 Nxe4 16. Bd5 $18) 15. e5 Ne4 16. Rc1 Na5 17. Bc2 Nc4 18. Nxc4 bxc4 19. Nd2 f5 {Strongly threatening ...f4.} 20. f4 Nxd2 21. Qxd2 Rb8 22. b3 (22. Bd1 {keeps more tension.} fxg4 23. hxg4 Qh4 24. Bf3 Be4 25. Bxe4 dxe4 26. Re2) 22... fxg4 23. hxg4 Bxc2 24. Qxc2 {[#]} (24. Rxc2 $15 cxb3 25. axb3) 24... Bxd4 $1 $19 {[%mdl 576] Threatens to win with ... Rxf4. Deflection} 25. Bxd4 $2 {White does not recover from this.} (25. Qh2 $17 Bxe3+ 26. Rxe3) 25... Rxf4 26. Ba7 $2 (26. Qd1 Qh4 27. Re2 Rxg4+ 28. Rg2 Rxd4 29. Qf3) 26... Rxg4+ 27. Kf1 Qf8+ 28. Bf2 Qf3 29. Re3 Qg2+ 30. Ke1 {intending Qe2.} Rf8 {( -> ...Qh1+)} 31. Re2 {If only White now had time for Be3....} c3 { Black mates.} 32. Kd1 {[#]} Rxf2 $1 {[%mdl 512]} 33. Rxf2 Qh1+ 34. Ke2 Re4+ 35. Qxe4 Qxe4+ 36. Kd1 Qd3+ 37. Ke1 Qe3+ {[%emt 0:00:13] Weighted Error Value: White=0.72/Black=0.} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.17"] [Round "2.2"] [White "Burke, John M"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "C55"] [WhiteElo "2538"] [BlackElo "2479"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,98,35,27,39,18,44,22,34,37,41,36,58,58,112,141,121,102,110,77,143, 145,218,93,92,102,94,81,97,99,138,133,133,83,85,68,62,49,58,12,10,8,25,31,20,0, 66,72,73,70,89,71,146,134,103,17,31,32,65,75,56,-86,-87,-100,-69,-85,-86,-111, -106,-108,-91,-91,-91,-100,0,0,0,-95,0,0,0,-29998,497,-164,432,-1170,0,-123,-5, -8,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. O-O d6 6. c3 g5 $1 {[%mdl 4] now scores much better than the old 6...g6. C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} 7. Nbd2 Bg7 8. Bb3 g4 9. Ne1 {[#]} h5 $146 ({ Predecessor:} 9... d5 10. f4 dxe4 11. fxe5 Nxe5 12. d4 Nc6 13. Qe2 Qe7 14. Bc2 O-O 15. Nxe4 Nxe4 16. Qxe4 Qxe4 17. Bxe4 {1/2-1/2 (32) Pasztor,B (2072) -Losonczi,M (2149) Zalakaros 2018}) 10. f4 exf4 11. Rxf4 d5 ({Black should play } 11... Bd7 $14) 12. exd5 $16 Nxd5 13. Rf1 f5 14. Nc4 O-O (14... Qe7 $142) 15. d4 f4 (15... Be6 $16 {is a better defense.} 16. Nd3 Kh8) 16. Ne5 (16. Nd3 $1 $18 {and the rest is easy.}) 16... Nxe5 17. dxe5 Be6 18. Nd3 f3 19. gxf3 { aiming for Nc5.} c6 20. Nc5 $1 {[%CAl Rc5e6]} Bf5 21. Qd4 Kh8 22. c4 (22. Nxb7 $6 Qe7 $11) 22... Nb4 23. Qxd8 Raxd8 24. fxg4 Bxg4 {White must now prevent ... Rxf1+.} 25. Bg5 (25. Nxb7 Rxf1+ 26. Kxf1 Rf8+ 27. Kg2 Nd3 $17) 25... Bxe5 26. Bxd8 (26. Nxb7 Rb8 $17) 26... Rxd8 27. a3 ({Of course not} 27. Nxb7 Rd2 $17) 27... Nd3 (27... Rd2 $1 $11 28. axb4 Bh3) 28. Nxd3 $14 (28. Nxb7 $2 Rg8 $19) 28... Rxd3 29. Bd1 {[%CAl Rd1g4] Threatens to win with Bxg4.} Be6 30. Bxh5 Rd2 (30... Bxb2 $142 31. Rae1 Bd4+ 32. Kh1 Bxc4) 31. Rad1 Rxb2 32. Rf3 (32. Rf2 $16 ) 32... Bxc4 33. Bf7 Be2 34. Rd8+ Kh7 35. Re3 (35. Rb3 $14 {keeps the upper hand.} Rxb3 36. Bxb3) 35... Bc7 $1 $17 {[%CAl Rc7d8]} 36. Bg8+ Kh6 37. Re6+ Kg5 38. h4+ {[%mdl 64] Decoy} Kxh4 39. Rd4+ Kg3 40. Rg6+ Kf3 41. Rf6+ Kg3 42. Rg6+ Kf3 43. Rf6+ Kg3 (43... Ke3 $17 44. Rb4 Rxb4 45. axb4 Bb6) 44. Rg6+ $11 Kf3 { ( -> ...Rb1+)} 45. Rd7 $2 {[%mdl 8192]} (45. Rf6+ $11 Ke3 46. Rb4 Rxb4 47. axb4 ) 45... Ke3 $4 {[%mdl 8192]} 46. Rf6 $4 {[%mdl 8192] [#]} ({But not} 46. Rxc7 Rb1+ 47. Kh2 Kd4 $18) (46. Re6+ $18 Kf4 47. Rxc7) 46... Ba6 $4 {[%mdl 8192]} 47. Rd4 $4 {[%mdl 8192]} Be2 $2 (47... Kxd4 $19 {is more deadly.} 48. Rf7 Bh2+ 49. Kh1 Be5) 48. Rd7 $17 {[#]} Be5 ({Black should try} 48... Bh2+ $1 $17 { [%mdl 512]} 49. Kxh2 Bg4+ 50. Kg3 Bxd7) 49. Re7 $1 $11 {[%CAl Re7e5]} Kd4 { Quite a comeback for White. Weighted Error Value: White=0.57/Black=0.64} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.17"] [Round "2.3"] [White "Balakrishnan, Praveen"] [Black "Niemann, Hans Moke"] [Result "0-1"] [ECO "C85"] [WhiteElo "2507"] [BlackElo "2571"] [Annotator "TA"] [PlyCount "100"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,100,0,6,2,8,-4,0,-8,-18,-18,-12,-29,0,0,0,0,0,0,0,0,0,0,0,0,0,-58, -14,-11,0,0,0,-34,0,0,0,-120,-123,-130,-127,-229,0,0,0,0,0,0,0,0,0,-262,-269, -271,-27,-410,-434,-763,-553,-1433,-447,-397,-213,-6131,-6102,-2838,-2465, -29975,-29976,-11190,-7578,-6124,-6187,-2595,-1710,-29973,-29974,-29974,-29975, -12841,-6395,-29974,-5944,-5173,-4132]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. d3 Nd7 8. Nbd2 O-O 9. Nc4 f6 10. Nh4 g6 11. Bh6 {C85: Closed Ruy Lopez: Deferred Exchange Variation.} Rf7 12. Qe2 Nc5 {[#]} 13. f4 $146 {The position is equal.} ({Predecessor:} 13. Be3 Be6 14. Nd2 Na4 15. Rfb1 Qe8 16. Nhf3 c5 17. Qe1 Bf8 18. Nc4 Bxc4 19. dxc4 Qc6 20. b3 Nb6 {1/2-1/2 (20) Kurdyukov,A (2255)-Kuehne,R (2247) ICCF email 2014}) 13... exf4 14. Rxf4 Be6 {Threatens to win with ...Bxc4.} 15. Ne3 Bd6 (15... g5 $6 16. Nhf5 $16) 16. Rff1 f5 17. Nf3 {[%CAl Rf3g5]} fxe4 18. Ng5 {[%mdl 64] Double Attack} exd3 19. cxd3 Rxf1+ 20. Rxf1 {Hoping for b4.} Qe7 21. d4 Nd7 22. b3 (22. Qf3 $11) 22... Re8 {Strongly threatening ...Bxb3!} (22... Bd5 $5) 23. Qf3 Nb6 24. Ne4 { Black must now prevent Nf6+.} Nd7 25. Ng5 a5 26. h4 a4 27. h5 (27. d5 $11 Ne5 28. Qd1) 27... Bxb3 $1 $17 ({Of course not} 27... axb3 $6 28. axb3 Kh8 29. hxg6 $11) 28. hxg6 hxg6 ({Not} 28... Qxe3+ 29. Qxe3 Rxe3 30. gxh7+ Kh8 31. axb3 $14) 29. Nf5 Qf6 $2 (29... gxf5 $19 30. axb3 Qf6) 30. Nxd6 $11 Qxd4+ 31. Kh1 Qh4+ 32. Kg1 Qd4+ {[%mdl 64] Double Attack} 33. Kh1 Qh4+ 34. Nh3 $2 {[%mdl 8192]} ( 34. Kg1 $11 Qd4+ {[%mdl 64] Double Attack}) 34... Bd5 $1 $19 {[%CAl Rd5f3]} 35. Qd3 {[#]} Re6 $40 {[%mdl 128] Black has some attack.} (35... Ne5 $1 $19 { [%mdl 512]} 36. Nxe8 Nxd3 37. Rf8+ Kh7 38. Nf6+ Qxf6 $3 {[%mdl 512]} 39. Rxf6 Kxh6) 36. Bg5 $2 {[%mdl 8192] Loses the game.} (36. Nf7 $11 {and White stays safe.}) 36... Qg4 {[%csl Gd5][%CAl Rg4g2]} ({Worse is} 36... Rxd6 37. Bxh4 Bxg2+ 38. Kxg2 $11) 37. Nf4 (37. Rf2 $142 cxd6 38. Kh2) 37... Qxg5 38. Nxb7 Rf6 (38... Ne5 $142 39. Qh3 Rf6 40. Qc8+ Kg7 41. Qxc7+ Rf7 42. Ne6+ Bxe6 43. Rxf7+ Nxf7) 39. Nxd5 Qxd5 (39... cxd5 $142 40. Rf3 c5) 40. Rd1 $2 (40. Rf3) 40... Qh5+ 41. Kg1 Ne5 42. Qd2 Ng4 {[%csl Gg4][%CAl Rh5h2]} 43. g3 Nf2 {[%csl Gf2] [%CAl Rh5h1]} 44. Qd8+ Rf8 45. Qxf8+ Kxf8 46. Rd8+ Ke7 47. Kxf2 Qh2+ 48. Kf3 Qxa2 49. Rd3 a3 (49... Qb1 $142 50. Re3+ Kf6 51. Nd8 Qd1+ 52. Kg2 Qd2+ 53. Kf3 Qd1+ 54. Re2 Qxd8 55. g4 a3 56. g5+ {[%mdl 64] Decoy} Kxg5 57. Re5+ Kf6 58. Re1 Qd3+ 59. Re3 {[#]} Qxe3+ $3 {[%mdl 576] Promotion} 60. Kxe3 a2 61. Ke2 a1=Q 62. Kf2 Qc3 63. Kf1 Kg5 64. Kf2 Kf4 65. Kg2 Qc2+ 66. Kh1 Kg3 67. Kg1 Qg2#) 50. Re3+ Kf8 {Weighted Error Value: White=0.99/Black=0.54} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.17"] [Round "2.4"] [White "Checa, Nicolas"] [Black "Brodsky, David"] [Result "1/2-1/2"] [ECO "E16"] [WhiteElo "2552"] [BlackElo "2455"] [Annotator "TA"] [PlyCount "66"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,66,19,19,12,3,2,0,0,4,4,11,4,13,0,18,4,10,0,13,9,14,0,20,0,0,0,0,0, 14,0,7,0,0,0,0,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 Be7 7. Nc3 c6 {The position is equal.} 8. O-O {E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+.} d5 9. Bf4 dxc4 10. Ne5 Nd5 11. Nxc4 Nxf4 12. gxf4 O-O 13. e3 Nd7 14. Qc2 Qc7 15. Rfd1 Rac8 16. Rac1 Rfd8 17. a3 Nf6 18. Ne5 c5 19. dxc5 {[#] aiming for c6.} Bxg2 20. Kxg2 {Threatens to win with c6.} Bxc5 21. Rxd8+ Rxd8 {[#]} 22. Qa4 $146 ({Predecessor:} 22. Rd1 Rc8 23. Qd3 g6 24. Qa6 Qb8 25. Nd7 Qa8+ 26. Kg1 Be7 27. Ne5 {1/2-1/2 (27) Prohaszka,P (2501)-Portisch,L (2519) Szentgotthard 2010}) 22... Rd2 {next ... Qb7+ is good for Black.} 23. Nc4 Rd7 24. b4 Bf8 25. Ne5 Rd2 26. Qa6 Nd5 27. Nxd5 Qxc1 28. Qxa7 Rxf2+ $1 {[%mdl 64] [#] Decoy} 29. Kxf2 Qd2+ {[%mdl 64] Double Attack} 30. Kf3 Qd1+ $1 31. Kg2 Qe2+ $1 32. Kg3 Qe1+ 33. Kf3 Qd1+ { A rather calm draw. Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.17"] [Round "2.5"] [White "Li, Ben"] [Black "Wang, Justin"] [Result "1-0"] [ECO "E12"] [WhiteElo "2376"] [BlackElo "2467"] [Annotator "TA"] [PlyCount "191"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,191,0,0,9,0,0,18,7,6,7,46,14,40,16,60,31,40,-33,33,-30,-12,-19,-15, -10,-12,-30,-27,-22,-18,-43,-41,-58,-41,-83,-18,-47,-15,-14,-12,-18,-16,-15, -18,-21,0,-2,-2,-7,0,0,0,0,39,12,16,16,0,0,20,0,0,0,187,35,42,31,91,7,92,46,38, 21,18,7,8,7,2,3,5,0,0,0,13,18,66,0,53,53,53,53,58,29,29,0,61,56,41,0,4,0,40,46, 66,51,66,20,21,22,22,28,29,15,16,14,14,0,0,0,0,0,0,0,0,0,506,464,464,0,0,0,393, 419,387,393,393,385,370,0,0,0,367,362,29959,29960,29960,29959,29959,29959, 29967,29968,29968,29969,29959,11879,3655,0,29961,29958,29958,29960,29956,533, 29958,29963,29961,29960,12846,12840,12512,11075,29979,29980,29976,29971]} 1. d4 {Shabalov,A} Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 d5 6. cxd5 Nxd5 7. Qc2 Nxc3 8. bxc3 c5 9. e4 Nd7 10. Bd3 Qc7 11. Qa2 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} Be7 12. O-O O-O 13. Qe2 {The position is equal.} h6 14. a4 {[#]} Rfe8 $146 ({Predecessor:} 14... a6 15. Be3 b5 16. Rfb1 Bc6 17. Nd2 bxa4 18. e5 cxd4 19. cxd4 Bb5 20. Nc4 Rfc8 { 1/2-1/2 (28) Shabalov,A (2585)-Khalifman,A (2702) Moscow 2001 EXT 2003 [Shabalov,A]}) 15. Bd2 Rad8 16. Rfb1 a5 17. Re1 Nf6 18. Bb5 (18. Rab1 $14) 18... Bc6 {[#]} (18... Nxe4 $15 19. Bxe8 Rxe8) 19. Rab1 (19. Bf4 $1 $14 Qc8 ( 19... Qb7 20. Bd3) 20. Ba6) 19... Bxe4 $11 20. Bxe8 Rxe8 21. Ra1 Qb7 22. dxc5 Bxc5 23. Be3 Rc8 24. Rec1 Bxe3 25. fxe3 Rc5 26. c4 Ng4 (26... Qc7 $17) 27. Nd2 Rg5 28. Nxe4 Qxe4 29. Qf3 Qe5 30. Qf4 Qc5 ({Much worse is} 30... Nxe3 $6 31. Qxe5 Rxe5 32. Rab1 $18) 31. Rc3 Ne5 32. h3 Qc6 {[%csl Gg5][%CAl Rc6g2]} 33. Ra2 Qd6 34. Rac2 Qd1+ 35. Kh2 Qh5 36. Rd2 Rg4 37. Qf2 Rg6 {Threatens to win with .. .Ng4+.} 38. Qf4 Rg4 39. Qf2 Rg6 40. Kh1 Kh7 $2 {[#]} (40... Ng4 $1 $11 { and Black is okay.} 41. Qe1 (41. Rd8+ Kh7 $11) 41... Nf6) 41. Rc1 $2 (41. c5 $1 $18 {[%CAl Rc5b6]} Ng4 42. Qe2 {[%mdl 64] Pin} (42. Qxf7 $2 Rf6 $19) 42... bxc5 43. Rdc2) 41... Rf6 $1 $14 {[%CAl Rf6f2]} 42. Qg3 Rg6 ({Better is} 42... Rf5 $14) 43. Qe1 ({White should try} 43. Qf4 $16) 43... Rg5 (43... Qg5 $1 $11 44. Qe2 Qe7) 44. Qd1 Qh4 45. Rd4 (45. Re2 {is more complex.} Rh5 46. Qd4 Qg3 47. Qe4+ Rf5 48. Rf1) 45... Qg3 {[%csl Gg5][%CAl Rg3g2]} 46. Qe2 Rf5 $1 {[%CAl Rf5f2] Strongly threatening ...Rf2.} 47. Rf4 Rxf4 48. exf4 Qxf4 $11 {Endgame KQR-KQN} 49. Rb1 Qd4 50. Rd1 Qc3 51. Qe4+ f5 52. Qe2 (52. Qe1 $14 Qc2 53. Rd6) 52... Nxc4 ({Black should play} 52... Kg6 $11) 53. Qxe6 $14 Ne3 54. Rg1 { [%mdl 1024] White has compensation.} Qd4 55. Rb1 Qd2 {[%csl Ge3][%CAl Rd2g2]} 56. Rg1 Qd4 57. Re1 f4 58. Rb1 (58. Rg1 {looks sharper.} Qb4 59. Qa2 Qd6 60. Qb1+ g6 61. Qb3) 58... Qd3 59. Re1 Qc2 {[%csl Ge3][%CAl Rc2g2]} (59... Qd4 { seems wilder.}) 60. Rg1 Qxa4 61. Qxb6 h5 62. Qb1+ (62. Qc5 $5 {[%CAl Rc5h5]} Qe8 63. Qxa5 $16) 62... Kh6 63. Qd3 Qc6 64. Qd4 g5 65. h4 {aiming for Qh8+.} Kg6 66. hxg5 Kxg5 67. Qg7+ Kh4 68. Qe5 Kg4 69. Kh2 Qc2 70. Qg7+ Kh4 71. Rc1 Qd2 $2 {[%mdl 8192]} (71... Qf2 $11 {and Black stays safe.}) 72. Qf6+ $18 Kg4 { [%csl Ge3][%CAl Rd2g2]} 73. Qg6+ Kh4 74. Qf6+ {[%mdl 64] Double Attack} Kg4 { [%csl Ge3][%CAl Rd2g2]} 75. Qe6+ Kh4 {[%csl Ge3][%CAl Rd2g2]} 76. Qh3+ Kg5 77. Rc5+ Kf6 78. Rc6+ Kg5 $1 79. Rc5+ Kf6 {( -> ...Ng4+). White now steadily converts the win.} 80. Rxh5 {Hoping for Rh6+.} Qf2 $2 (80... Qd3 $18 81. Qh4+ { [%mdl 64] Double Attack} Ke6 82. Rxa5 Nd5 83. Qg4+ Kf6) 81. Rh6+ Ke5 82. Qe6+ Kd4 83. Qb6+ {[%mdl 64] Double Attack} Kd3 84. Rd6+ Ke2 85. Qb5+ Ke1 86. Qb1+ ( 86. Qxa5+ $142 Kf1 87. Qa1+ Ke2 88. Qb2+ Kf1 89. Qc1+ Qe1 90. Qxe1+ Kxe1 91. Rd4) 86... Ke2 87. Qb5+ (87. Qb2+ $18 Kf1 88. Qc1+ Qe1 89. Qxe1+ Kxe1 90. Rd4) 87... Ke1 {[%csl Ge3][%CAl Rf2g2]} 88. Qxa5+ Kf1 89. Qa1+ Qe1 90. Qxe1+ Kxe1 { KR-KN} 91. Rd4 f3 92. gxf3 Kf2 93. f4 Kf3 {[#]} 94. Kh3 $1 Nc2 95. Ra4 Ne3 96. Kh4 {Weighted Error Value: White=0.22/Black=0.21} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.18"] [Round "3.1"] [White "Wang, Justin"] [Black "Balakrishnan, Praveen"] [Result "0-1"] [ECO "D85"] [WhiteElo "2467"] [BlackElo "2507"] [Annotator "TA"] [PlyCount "152"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,152,23,37,-23,-11,-11,-8,-16,-14,-20,0,0,29,9,42,36,37,-4,44,10,9,10, 52,30,60,53,64,64,61,45,50,0,0,0,0,0,85,82,137,0,15,-18,0,0,102,-119,-77,-73, -56,-61,35,49,50,-38,-37,-37,-37,-59,0,-74,-79,-75,0,-23,0,0,0,0,0,-77,-85, -126,0,0,0,0,0,0,0,0,0,0,0,-175,0,-130,-259,-247,0,0,0,-260,-252,-245,-130, -176,-191,-175,-128,-12818,-12818,-12824,-12822,-12819,-12823,-12825,-12827, -12827,-12827,-12825,-12829,-12829,-12829,-12825,-12831,-12829,-12831,-12830, -12832,-12831,-12831,-12835,-12835,-12833,-12835,-12840,-12840,-12843,-12841, -12841,-12842,-12843,-12843,-12845,-12844]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Qd2 Qa5 9. Nf3 O-O 10. Rc1 Nd7 11. Bh6 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3. } ({White should play} 11. Bd3 $14) 11... Nf6 $1 $11 {[%CAl Rf6e4]} 12. Bxg7 Kxg7 13. Bd3 {The position is equal.} Rd8 {[#]} 14. h3 $146 ({Predecessor:} 14. Qg5 Qa3 15. O-O cxd4 16. Nxd4 Rxd4 17. cxd4 Qxd3 18. e5 Nd5 19. Rfd1 Qa3 20. h4 Qxa2 {0-1 (34) Corral Blanco,J (2439)-Salgado Lopez,I (2619) Linares 2014}) 14... b6 15. d5 c4 16. Bb1 (16. Bxc4 Nxe4 17. Qe3 Nd6 $15) 16... Qc5 17. O-O e6 {[%CAl Re6d5]} 18. Qg5 Bd7 {[%CAl Re6d5]} 19. Rfe1 exd5 20. e5 $1 {[%CAl Re5f6] } Ng8 (20... Ne8 {is interesting.} 21. h4 Nc7 22. h5 Ne6 23. Qf6+ Kg8) 21. Nd4 {[%mdl 1024] White has compensation.} Qe7 22. Qg3 $36 {[%mdl 2048] White has the initiative.} Kh8 23. h4 Qf8 24. h5 gxh5 25. Qf4 (25. Qh4 {is more complex.} Qh6 26. Re3 Rf8 27. Rce1 Rae8 28. Rg3) 25... Qg7 26. Qh4 Qg4 27. Qh2 Ne7 (27... Rf8 $11) 28. Re3 $1 $16 {[%CAl Re3g3]} Ng6 (28... h4 $142) 29. Rf3 (29. Bxg6 $16 hxg6 30. f4) 29... Rf8 30. Re1 Rae8 31. Bxg6 hxg6 (31... fxg6 $2 32. Rxf8+ Rxf8 33. e6 $18) (31... Qxg6 $11 {keeps the balance.} 32. Qf4 Qg4) 32. Rf4 $2 ( 32. Rh3 $1 $16 {and life is bright.}) 32... Qg5 (32... Rxe5 {keeps more tension.} 33. Rf1 Qg5 34. Nf3 Qe7 35. Nxe5 Qxe5 36. Rd4 Qxh2+ 37. Kxh2 Be6) 33. Nf3 Qd8 34. g4 h4 (34... f5 $1 $15 35. gxh5 g5) 35. Rf6 $14 Kg7 $1 36. Qxh4 ({ Better is} 36. Ng5 $1 $14 Qe7 37. Qxh4) 36... Rh8 $15 37. Qg3 Re6 38. g5 Re7 ( 38... Rxf6 $2 39. exf6+ Kg8 40. Re7 $18) (38... b5 $15) 39. Nd4 (39. Qf4 $11) 39... Rh3 $17 40. Qg2 Rh5 (40... Rh4 $1 $17 {[%CAl Rh4g4]} 41. e6 Rxe6 42. Nxe6+ Bxe6 43. Rfxe6 fxe6) 41. f4 $11 Rh4 {Threatens to win with ...Rg4.} 42. e6 ({Don't play} 42. Qxd5 Qh8 $17) 42... Bxe6 43. Rexe6 fxe6 44. Qc2 (44. Qg3 $11 Rh5 45. Nxe6+ Rxe6 46. Rxe6) 44... Qe8 $17 {Strongly threatening ...e5!} 45. Nc6 Rg4+ (45... Rb7 $17 {...Kg8 is the strong threat.} 46. Nd4 Kh8 47. Nxe6 Rbh7) 46. Kf1 $11 Rxf4+ 47. Rxf4 Qxc6 {[%mdl 4096] Endgame KQR-KQR} 48. Qh2 $1 {[%CAl Rh2h6] Threatening mate with Qh6+.} Rf7 $1 {[%CAl Rf7f5]} 49. Rxf7+ ({ But not} 49. Qh6+ Kg8 $17) 49... Kxf7 {KQ-KQ} 50. Qh7+ Kf8 {Hoping for ...Qa4.} 51. Qh8+ $2 (51. Qh6+ $1 $11 Ke7 52. Qxg6) 51... Ke7 $19 {White must now prevent ...Qe8.} 52. Qf6+ (52. Qg7+ $1 $11 {was the only way to keep the balance.} Kd6 53. Qf8+ Kc7 54. Qf7+ Kd6 55. Qf8+ Kc7 56. Qf7+ Kd6 57. Qf8+) 52... Kd6 $17 53. Qf8+ Ke5 54. Qf6+ Kd6 55. Qf8+ Kc7 $1 56. Qg7+ {[#]} Qd7 $1 { [%CAl Rd7g7]} 57. Qxg6 d4 58. cxd4 c3 59. Ke2 $2 {[%mdl 8192] Now White is beyond hope.} (59. Qd3 $17) 59... Qxd4 $19 {Black is clearly winning.} 60. Qf7+ Kd6 61. Qf8+ {[#]} Kc6 $1 62. g6 Qd2+ {[%mdl 64] Double Attack} 63. Kf3 Qd3+ 64. Kf2 c2 65. g7 Qd2+ 66. Kf3 c1=Q 67. Qc8+ Kb5 {( -> ...Qf4+)} 68. Qxc1 Qxc1 69. g8=Q {KQ-KQ} Qa3+ 70. Ke4 Qxa2 71. Qe8+ Ka5 72. Kd3 Qd5+ 73. Kc3 Qc5+ 74. Kd2 e5 75. Qe6 Kb4 76. Qe8 a5 {Weighted Error Value: White=0.35/Black=0.27} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.18"] [Round "3.2"] [White "Yoo, Christopher Woojin"] [Black "Li, Ben"] [Result "1-0"] [ECO "E04"] [WhiteElo "2479"] [BlackElo "2376"] [Annotator "TA"] [PlyCount "125"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,125,19,23,8,26,34,34,16,53,0,18,12,31,27,34,35,35,35,29,19,34,37,43, 38,60,46,152,141,173,173,162,155,147,158,181,163,241,237,234,232,233,204,237, 232,226,226,230,227,244,188,235,239,239,172,172,172,172,165,165,162,165,165, 165,165,163,156,156,155,533,452,533,533,513,527,1126,274,1089,1091,996,833,989, 921,921,921,920,728,408,170,29980,29981,29982,29983,29983,29984,29984,29985, 29985,29986,29986,29987,29988,29986,29985,29986,29990,29991,29991,29992,29993, 29994,29994,726]} 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O e6 6. c4 dxc4 7. Qa4 Bd7 8. Qxc4 b5 9. Qc3 {E04: Open Catalan: 5 Nf3.} Rc8 10. dxc5 Nd5 11. Qd2 {White is slightly better.} Bxc5 12. e4 ({White should try} 12. Nc3 $14) 12... Nf6 13. Qg5 Nxe4 14. Qxg7 Qf6 15. Qxf6 Nxf6 {[#]} 16. Nc3 $146 ({ Predecessor:} 16. a3 b4 17. axb4 Nxb4 18. Nc3 Nbd5 19. Ne5 Nxc3 20. bxc3 Bb5 21. Rd1 Nd7 22. c4 Nxe5 23. cxb5 {0-1 (71) Znidaric,A (1837)-Badalyan,S (2081) Maribor 2012}) 16... b4 {[#]} 17. Bg5 $1 $36 {[%mdl 2048] White is more active. } bxc3 (17... Be7 18. Nb5) 18. Bxf6 cxb2 19. Bxb2 Rg8 20. Rfd1 Bb6 {[#]} (20... Nb4 $14) 21. Nd2 $1 $16 f5 22. Nc4 Bc5 23. Nd6+ Bxd6 24. Rxd6 Ne7 25. Rad1 Nd5 (25... Rc7 {keeps fighting.} 26. Bf3 Nd5 27. Bh5+ (27. Bxd5 exd5 28. Re1+ Kd8 $18) 27... Kf8) 26. Bxd5 $18 exd5 {[#]} 27. Re1+ $1 ({But not} 27. R1xd5 Rc7) 27... Kd8 28. Bf6+ Kc7 29. Be5 Kd8 30. Rxd5 Rf8 31. Ra5 Ra8 32. Bd4 Re8 {[#]} 33. Bb6+ $1 {[%mdl 512]} Kc8 34. Rxe8+ Bxe8 35. Rxa7 Rxa7 36. Bxa7 {[%mdl 4096] Endgame KB-KB} Kb7 37. Be3 Kc6 38. Kg2 Kd5 39. Kf3 Ke5 40. Bd2 Bc6+ 41. Ke3 Ba4 $2 {Black cannot hold the game after this.} (41... Kf6 $16 {is a better chance. } 42. Kf4 Bb5 43. Bc3+ Kg6) 42. Bc3+ Ke6 43. Kf4 Bc2 44. Kg5 Kf7 45. Bb2 $2 ( 45. f4 Bd3 46. Kh6) 45... Kg8 $2 (45... Ke6 46. h4 Kd5) 46. Kf6 Kf8 47. Bc3 Kg8 48. Bb4 Kh8 49. Kf7 {[%CAl Rb4c3]} h5 50. Kg6 h4 51. gxh4 (51. Bc3+ $142 Kg8 52. gxh4 f4+ 53. Kg5) 51... Kg8 $2 (51... f4+ $18 52. Kg5 f3 53. Bc3+ Kg8) 52. f4 {White mates.} Kh8 53. h5 Ba4 54. Kxf5 Kh7 55. Kg5 Be8 56. f5 Kg7 57. h6+ Kh7 58. Bd2 Bb5 59. Kf6 Ba4 60. Ke7 Bb5 61. f6 Bc4 62. f7 Bxf7 63. Kxf7 { Weighted Error Value: White=0.26/Black=0.42} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.18"] [Round "3.3"] [White "Jacobson, Brandon"] [Black "Burke, John M"] [Result "0-1"] [ECO "A06"] [WhiteElo "2504"] [BlackElo "2538"] [Annotator "TA"] [PlyCount "74"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,74,60,43,13,15,6,18,6,12,18,21,13,28,22,29,23,22,0,33,0,0,0,15,0,-12, -39,-53,-30,0,0,0,0,0,0,0,0,0,0,-1,-57,-38,-154,-151,-150,-147,-272,-268,-269, -269,-247,-247,-270,-243,-253,-225,-171,-174,-273,-286,-408,-228,-12838,-12839, -12839,-12839,-12840,-12840]} 1. Nf3 d5 2. e3 c5 3. b3 Nc6 4. Bb2 f6 5. d4 cxd4 6. Nxd4 {A06: Réti Opening: 1 Nf3 d5.} e5 7. Nxc6 bxc6 8. c4 {[#] The position is equal.} Be6 $146 ({Predecessor:} 8... Bb4+ 9. Nd2 Ne7 10. a3 Bd6 11. Be2 O-O 12. O-O Rb8 13. b4 a5 14. c5 Bc7 {1-0 (100) Jian,A (2089)-Bommini, M (2029) Chess.com INT 2020}) 9. cxd5 cxd5 10. Bb5+ Kf7 11. O-O Rc8 12. Ba6 Rc6 13. Bb5 Rc8 14. Be2 Bd6 15. Nc3 Ne7 16. a3 h5 17. Nb5 Bb8 18. f4 {Threatens to win with fxe5.} Qb6 (18... Nf5 {seems wilder.} 19. Qd3 g6 20. fxe5 fxe5 21. Nc3 Kg7) 19. fxe5 {And now Bd4 would win.} Qxe3+ {[%mdl 64] Double Attack} 20. Kh1 Bxe5 21. Bxe5 Qxe5 22. Nxa7 Rc3 {[%CAl Bc8c3,Bc3e3,Be3e4][%mdl 32] aiming for . ..Nf5.} 23. Nb5 Re3 24. Nd4 (24. Bd3 $1 $11) 24... Bg4 $1 $15 {[%CAl Rg4e2]} 25. Bf3 {[#]} ({Better is} 25. Nf3 $15 Qb2 26. Re1) 25... Re4 $1 $17 {[%CAl Re4d4][%mdl 512]} 26. Nc2 Nf5 27. Qd3 (27. Rf2 $17) 27... Bxf3 $19 28. Rxf3 h4 29. Rd1 h3 $40 {[%mdl 128] Black goes for the king.} 30. Qxd5+ Qxd5 31. Rxd5 hxg2+ 32. Kg1 {[#]} Nh4 {[%CAl Rh4f3]} 33. Re3 {[#]} (33. Rf2 {was the only chance.}) 33... Rhe8 $1 34. Rdd3 (34. Rd7+ $142 Kg6 35. Rxe4 Rxe4 36. Rd3) 34... g5 (34... Rf4 $142 {[%csl Gg2][%CAl Rf4f1]} 35. Rd7+ Kg6) 35. a4 $2 (35. Rxe4 Rxe4 36. Rd1) 35... Rf4 {[%csl Gg2][%CAl Rf4f1] Black is clearly winning.} 36. Rd7+ Kg6 {[%csl Gg2][%CAl Rf4f1]} 37. Rd1 {[#]} Rd8 $3 {[%mdl 512] Weighted Error Value: White=0.50/Black=0.06} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.18"] [Round "3.4"] [White "Niemann, Hans Moke"] [Black "Checa, Nicolas"] [Result "1-0"] [ECO "C10"] [WhiteElo "2571"] [BlackElo "2552"] [Annotator "TA"] [PlyCount "59"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 22,59,33,46,100,92,89,102,77,83,126,121,122,125,166,121,458,443,484,507, 500,496,521,519,879,881,805,884,861,835,844,852,892,892,867,871,859,859,762, 737]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Nbd7 6. Nf3 Be7 7. Nxf6+ Nxf6 8. Bd3 c5 9. dxc5 Qa5+ 10. c3 Qxc5 11. Qe2 O-O 12. O-O-O Ng4 {C10: French with 3 Nc3: Unusual Black 3rd moves and 3...dxe4.} (12... h6 $14 13. Bxf6 Bxf6) 13. Bxe7 $16 Qxe7 14. Qe4 {[%csl Gd3][%CAl Re4h7] [#]} Nf6 {White is better.} 15. Qh4 {[#]} Re8 $146 ({Predecessor:} 15... g6 16. Ne5 Nd5 17. Qd4 f6 18. Nf3 Qc7 19. Bc4 Nb6 20. Bb3 Kg7 21. Rhe1 Re8 {1-0 (31) Alonso,S (2483)-Granara Barreto,S (2190) Montevideo 2011}) 16. g4 {g5 is the strong threat.} g6 17. g5 $36 {[%mdl 2048] White is really pushing.} Nd5 18. Ne5 f6 $2 {[%mdl 8192]} ( 18... h5 $16) 19. Nxg6 $18 {White is clearly winning.} hxg6 20. Bxg6 fxg5 21. Qh6 Bd7 22. Bxe8 Qxe8 (22... Rxe8 $142 23. Rhg1 Qh7 24. Qxg5+ Kf7) 23. Rhg1 Kf7 24. Rxg5 {[%csl Gg5][%CAl Rh6g7]} Qh8 25. Qg6+ Ke7 26. Rh5 Qf8 27. Rh7+ Kd8 28. Rf7 Qh8 {[#]} 29. Rxd5 $1 {[%mdl 512]} exd5 30. Qd6 {[%csl Gf7][%CAl Rd6d7] [%mdl 64] Double Attack. Black got outplayed after the opening. Weighted Error Value: White=0.03/Black=0.76} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.18"] [Round "3.5"] [White "Brodsky, David"] [Black "Hong, Andrew"] [Result "1-0"] [ECO "C45"] [WhiteElo "2455"] [BlackElo "2474"] [Annotator "TA"] [PlyCount "67"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,67,0,-13,8,-6,-9,-18,70,46,46,35,24,26,29,31,29,22,42,26,28,24,30,31, 42,31,25,35,33,16,60,27,133,127,139,147,398,348,376,389,725,715,708,703,706, 351,858,845,29989,29990,29989,279,29995,29989,29996,29997]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. h4 f6 {C45: Scotch Game.} 9. c4 {[#]} Ba6 $1 10. Rh3 {[#]} (10. exf6 Nxf6) 10... Nb4 $146 (10... fxe5 $11 11. Bg5 Qd6) ({Predecessor:} 10... fxe5 11. Bg5 Nf6 12. Re3 d6 13. Qf3 Qd7 14. Nc3 Be7 15. Bd3 O-O 16. Bf5 Qe8 {0-1 (30) Nepomniachtchi,I (2784) -Aronian,L (2781) Chess.com INT 2020}) 11. a3 Nd5 12. b4 Nb6 13. exf6 Qxe2+ 14. Bxe2 {Black must now prevent Bb2.} Bxc4 15. Re3+ Kf7 16. fxg7 Bxg7 17. Bh5+ Kg8 18. Rg3 h6 19. Bb2 Rh7 20. Nc3 Bf7 21. Be2 Kh8 22. O-O-O Be5 (22... d6 $11) 23. Re3 $16 Bf6 {[#]} 24. Rf3 $1 {[%CAl Rf3f6]} Bxh4 {[%mdl 8192] Loses the game.} (24... Be5 $16) 25. Bd3 Rg7 26. Ne4 {Hoping for Rxf7.} Bg6 (26... Bh5 27. Rh3 ( 27. Bxg7+ Kxg7 28. g4 Bg6 $16) 27... Bxd1 28. Rxh4 (28. Kxd1 Be7 $16) 28... Kg8 29. Bxg7 (29. Rxh6 Bb3 $14) 29... Kxg7 30. Kxd1 a5) 27. Rh1 $18 Bxe4 {[#]} 28. Rf7 $1 {[%mdl 64] Pin} Bg5+ (28... Bxd3 29. Rxh4) 29. Kd1 (29. f4 $142 Na4 {[#] } 30. Bd4 $1 {[%mdl 64] Pin} (30. fxg5 Nxb2 31. Rxh6+ Kg8 $18)) 29... Rag8 $2 { [#]} (29... Bxd3 30. Rxg7 Nc4) 30. f4 $1 Bxd3 (30... Bh4 31. Bxe4) 31. fxg5 Nc4 32. Ba1 $2 (32. Rxh6+ {mates} Bh7 33. Bd4 {[%mdl 64] Pin} Ne3+ 34. Kc1 Nf5 35. Rxf5 c5 36. bxc5 Rb8 37. Rf7 {[%mdl 64] Pin}) 32... Nd6 $2 ({Inferior is} 32... Nxa3 33. Rxh6+ Bh7 34. g6 Re8 35. Rxh7+ {[%mdl 64] Double Attack, Pin} Kg8 36. Rfxg7+ Kf8 37. Rh8#) ({Wrong is} 32... Ne3+ $2 33. Kd2 $18) (32... Be2+ $18 33. Ke1 (33. Kxe2 Re8+ 34. Kf2 Ne5 $16) 33... h5) 33. Rxh6+ Bh7 34. g6 {[%csl Gg6] [%CAl Rh6h7][%mdl 64] Pin. Weighted Error Value: White=0.42/Black=0.89} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.19"] [Round "4.1"] [White "Balakrishnan, Praveen"] [Black "Checa, Nicolas"] [Result "1/2-1/2"] [ECO "D27"] [WhiteElo "2507"] [BlackElo "2552"] [Annotator "TA"] [PlyCount "98"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 22,98,19,8,16,0,0,0,0,-3,-10,-8,0,0,0,0,0,0,0,-3,-6,-9,-6,-8,0,0,0,-1, -1,-28,-24,-27,-6,-9,-9,-26,-8,-23,-8,-16,-23,-23,0,-23,-8,-8,-1,-1,-1,-3,-1, -7,-1,-1,-1,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24,-24, -24,0,0,0,-24,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Qxd1 8. Rxd1 Bxc5 9. a3 b5 10. Be2 Ke7 11. b4 Bd6 12. Bb2 Bb7 { D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} 13. Be5 { [#]} Bxe5 $146 ({Predecessor:} 13... Rd8 14. Bxd6+ Rxd6 15. Rxd6 Kxd6 16. Nc3 Nbd7 17. a4 bxa4 18. Nxa4 Nd5 19. Rb1 Bc6 20. Nb2 {0-1 (54) Galaktionov,A (2319)-Timofeev,A (2580) Chess.com INT 2020}) 14. Nxe5 Nbd7 15. Nxd7 Nxd7 16. Nd2 Rhc8 17. Rdc1 Nb6 18. f3 f5 19. Kf2 e5 20. Nb3 Na4 21. Rxc8 (21. Nd2 { seems wilder.} Bd5 22. e4 fxe4 23. Nxe4 Bxe4 24. fxe4 Rc3 25. Rxc3 Nxc3 26. Rc1 ) 21... Rxc8 22. Rc1 Kd6 23. Rxc8 Bxc8 $11 {[%mdl 4096] Endgame KBN-KBN} 24. e4 Be6 25. Nd2 f4 26. Bd1 Nb6 27. Ke2 g5 28. h3 h6 29. Bc2 Kc6 30. Bd1 Bc4+ 31. Ke1 $1 Be6 32. Bc2 Nc8 33. Bb3 Bxb3 (33... Kd7 {is more complex.} 34. Bxe6+ Kxe6 35. Ke2 Nd6 36. Kd3 Ke7) 34. Nxb3 {KN-KN} Nd6 35. Na5+ Kb6 36. Kd2 h5 37. Kd3 Kc7 38. Ke2 g4 39. hxg4 hxg4 40. Kd3 g3 41. Ke2 $1 Kd7 42. Kd3 Nc8 43. Ke2 Nb6 44. Kd3 Kc7 45. Ke2 Na4 46. Kd3 Nb2+ 47. Kc2 Na4 48. Kd3 Nb2+ 49. Kc2 Na4 { An uneventful encounter. Weighted Error Value: White=0.04/Black=0.05} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.19"] [Round "4.2"] [White "Burke, John M"] [Black "Brodsky, David"] [Result "1-0"] [ECO "B90"] [WhiteElo "2538"] [BlackElo "2455"] [Annotator "TA"] [PlyCount "63"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,63,10,5,20,0,0,0,0,0,34,33,20,30,40,27,26,24,36,41,64,71,124,124,182, 193,189,179,164,162,199,193,204,202,198,196,436,429,683,697,698,684,927,954, 1125,1064,1323,1337,1305,1327,1310,1267,2244,2197,2343,2118]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Nb3 e6 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 7. g4 b5 8. Bg2 {Hoping for e5!} Bb7 {The position is equal.} 9. a3 Be7 10. g5 Nfd7 11. f4 h6 {[%CAl Rh6g5]} 12. h4 $36 {[%mdl 2048] [#] White has good play.} hxg5 $146 ({Predecessor:} 12... Nc6 13. Be3 Nb6 14. Nd2 Na5 15. Bd4 hxg5 16. hxg5 Rxh1+ 17. Bxh1 e5 18. fxe5 Bxg5 { 0-1 (25) Farokhi,K (1963)-Pubantz,J (2192) Willingen 2019}) 13. hxg5 Rxh1+ 14. Bxh1 Qb6 {Threatening ...Qg1+.} 15. Qf3 Nc6 {White leaves nothing to chance now.} (15... Nc5 $142) 16. Be3 $16 Nc5 (16... Qc7 $16 {might work better.}) 17. g6 $18 b4 ({Much worse is} 17... fxg6 18. Qg4) 18. gxf7+ Kxf7 {[#]} 19. Na4 { [%mdl 512]} Bh4+ (19... Qc7 20. Nbxc5) 20. Kd1 Qd8 21. Naxc5 dxc5+ 22. Kc1 bxa3 $2 (22... Be7 {was necessary.}) 23. Rxa3 {White is clearly winning.} Nd4 (23... Be7 $142 24. Qh5+ (24. Bxc5 Qc7 $16) 24... Kg8 25. Nxc5 {[%mdl 64] Double Attack} Qf8) 24. Qh5+ {[%mdl 64] Double Attack} Kg8 25. Nxc5 Rb8 26. Rd3 Qa5 27. Qxh4 Qa1+ 28. Kd2 Qa5+ 29. Kd1 Qa1+ 30. Bc1 e5 31. fxe5 Rf8 32. Rxd4 { Weighted Error Value: White=0.03/Black=0.48} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.19"] [Round "4.3"] [White "Hong, Andrew"] [Black "Niemann, Hans Moke"] [Result "0-1"] [ECO "B12"] [WhiteElo "2474"] [BlackElo "2571"] [Annotator "TA"] [PlyCount "88"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,88,-8,-1,7,26,26,61,-18,-5,-48,-56,-48,-56,-52,-45,-43,-43,-49,-4,-37, -18,-20,0,-20,0,0,-22,-33,-30,-28,-16,-30,0,0,0,0,0,0,0,0,0,-42,-38,-76,-50, -87,-86,-74,-73,-102,-99,-127,-127,-184,-182,-189,-194,-204,-203,-195,-168, -238,-175,-743,-787,-758,-751,-879,-867,-872,-861,-877,-862,-878,-872,-867, -857,-847,-826,-1251,-1245]} 1. e4 c6 2. d4 d5 3. e5 c5 4. Nf3 cxd4 5. Qxd4 Nc6 6. Qf4 {B12: Caro-Kann: Advance Variation.} g6 $5 {[%mdl 4] [#] Threatens to win with ...Bh6. Exploring less charted territory.} 7. Nc3 d4 {[#] aiming for . ..Bh6.} 8. Ne4 $146 ({White should play} 8. Nb5 $14 Bh6 9. Qh4 Qa5+ 10. c3 Bxc1 11. Rxc1) ({Predecessor:} 8. Bc4 Bf5 9. Nb5 Bh6 10. Qh4 Qa5+ 11. Ke2 O-O-O 12. Bxh6 Qb4 13. Nxa7+ Nxa7 14. Bd3 Nxh6 15. Qxh6 Qxb2 {1-0 (43) Iljiushenok,I (2516)-Remizov,Y (2403) Cheliabinsk 2020}) 8... Bh6 $11 9. Neg5 f6 10. exf6 exf6 11. Qe4+ Kf8 $1 12. Ne6+ Bxe6 13. Bxh6+ Kf7 14. Bd2 Bd5 15. Qe2 Nge7 16. O-O-O Re8 17. Qd3 Qb6 ({Not} 17... Bxa2 18. b3 $16) 18. Qb5 Qxb5 19. Bxb5 a6 ({ Don't blunder} 19... Bxa2 $2 20. b3 $18) 20. Bd3 Bxf3 21. gxf3 Ne5 22. Be4 f5 23. Bf4 N5c6 24. Bd3 b5 25. Bd6 Nd5 26. a4 Red8 27. Bc5 Rab8 {Black continues to play with concentration.} 28. axb5 axb5 29. Rhe1 Nf4 30. b3 Rd5 31. Ba3 (31. b4 $17 {was worth a try.}) 31... Nxd3+ 32. Rxd3 Ne5 33. Rxe5 Rxe5 34. Rxd4 $19 {[%mdl 4096] Endgame KRR-KRB} Re1+ 35. Kb2 (35. Kd2 {only move.} Rbe8 36. Rd7+ Kg8 37. Bc5) 35... Rb7 36. Rd2 $2 {[#]} (36. Bc5) 36... b4 {Black is clearly winning.} 37. Bxb4 Rxb4 38. Rd7+ Re7 39. Rd2 Ke6 40. c3 Rh4 41. c4 Rd7 42. Re2+ Kd6 43. Kc3 Kc7 44. b4 Rdd4 {Weighted Error Value: White=0.36/Black=0.08} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.19"] [Round "4.4"] [White "Wang, Justin"] [Black "Yoo, Christopher Woojin"] [Result "1/2-1/2"] [ECO "B45"] [WhiteElo "2467"] [BlackElo "2479"] [Annotator "TA"] [PlyCount "156"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,156,10,22,21,12,18,24,15,17,17,6,-8,0,0,-10,-24,-22,-29,-4,-44,-44, -56,-50,-67,-49,-63,-56,-59,-63,-108,-131,-119,-122,-129,-115,-115,-123,-142, -141,-135,-119,-120,-114,-151,-146,-154,-143,-157,-152,-156,-147,-127,-56,-65, -82,-109,-113,-104,-85,-186,-175,-267,-293,-300,-300,-300,-279,-456,-236,-238, -212,-195,-195,-335,-239,-239,-239,-239,-236,-235,-200,-212,-158,-149,-32,-32, -32,-32,-32,-849,-39,-35,-12,-12,-12,-12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 {Golod,V} c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. Bd3 O-O 10. O-O {B45: Sicilian Four Knights.} d4 11. Ne2 e5 12. h3 {White has an edge.} Re8 13. Ng3 {13.Ng3 has lost popularity.} Nd7 14. f4 exf4 15. Bxf4 Nde5 16. Qh5 f6 17. b4 Be6 {[#]} 18. Rac1 $146 (18. b5 $5 {[%CAl Rb5c6]} Bf7 19. Qe2 $11) ({Predecessor:} 18. b5 Bf7 19. Qe2 Na5 20. Nf5 Bg6 21. Nh4 Rc8 22. Bxe5 Rxe5 23. Nf3 Re7 24. Rae1 {1/2-1/2 (63) Ponomariov,R (2677)-Kortschnoj,V (2639) Donetsk 2001 CBM 081 [Golod,V]}) 18... a6 19. Bd2 b5 20. Be1 Qd7 21. Ne2 Nc4 22. Bf2 Bf7 23. Qf5 Qxf5 24. exf5 Nxa3 25. Be1 Nc4 26. Rf4 Rad8 27. Re4 N4e5 28. Nf4 g5 29. fxg6 hxg6 30. h4 g5 31. hxg5 fxg5 32. Nh3 Bg6 33. Nxg5 Bxe4 34. Bxe4 Rd7 (34... Rd6 $17 35. Ra1 Nf7 36. Bh7+ Kg7 37. Nxf7 Kxf7) 35. Ra1 $15 Rg7 36. Bd5+ Kh8 37. Ne6 Rd7 38. Bb3 (38. Nf4 $17 {was called for.}) 38... Rde7 39. Ng5 (39. Nc5 $142) 39... Rg7 $19 40. Ne6 Rg6 41. Nf4 Rg4 42. Ne6 (42. Nd3 { keeps fighting.}) 42... Nf3+ (42... Nc4 $142 43. Nc7 Re2) 43. Kf2 Nxe1 44. Rxe1 Rh4 (44... Nxb4 $2 45. Rh1+ Kg8 46. Nc7+ Kg7 47. Nxe8+ $18) 45. g4 (45. Rd1 $142) 45... Nd8 46. Nxd8 Rxd8 {[%mdl 4096] Endgame KRR-KRB} 47. Kg3 Rh7 48. Kf4 {[#]} Rc7 $1 49. Kg5 d3 50. cxd3 {[#]} Rxd3 (50... Kg7 $1 $17 51. Re6 Rxd3) 51. Re8+ $1 $15 Kg7 52. Be6 Re3 53. Rg8+ $1 Kh7 54. Re8 $1 Rf3 (54... Rec3 { is interesting.} 55. Kf6 R3c6 56. Kg5 Ra7 57. Kf6 Rg7) 55. Bf5+ {The position is equal.} Kg7 56. Re6 Ra3 57. Rg6+ Kf7 58. Rf6+ Kg8 59. Rb6 Kg7 (59... Ra1 { is more complex.} 60. Kg6 Rg7+ 61. Kf6 Kh8 62. g5 Rg1) 60. Rg6+ Kf8 {Strongly threatening ...Rg7.} 61. Rf6+ Rf7 62. Rb6 Ra4 (62... Rh3 {seems wilder.} 63. Rxa6 Rg7+ 64. Bg6 Rb7 65. Kf6 Rf3+) 63. Kg6 Rg7+ ({Avoid the trap} 63... Rxb4 $2 64. Rb8+ Ke7 65. Rb7+ Kd6 66. Kxf7 $18) (63... Re7 {feels hotter.} 64. Rb8+ Re8 65. Rb7 Rxb4 66. Rf7+ Kg8) 64. Kf6 {[%CAl Rb6b8]} Rf7+ 65. Kg6 Re7 ({ But not} 65... Rxb4 $2 66. Rb8+ Ke7 67. Rb7+ Kd6 68. Kxf7 $18) (65... Rc7 { with more complications.} 66. Kf6 Rf7+) 66. Kf6 {Hoping for Bg6.} Ra1 67. g5 Rf7+ 68. Kg6 {And now Rb8+ would win.} Re1 (68... Rg7+ {keeps more tension.} 69. Kf6 Rf7+) 69. Rxa6 Rg7+ 70. Kf6 {White threatens Ra8+ and mate.} Rf7+ 71. Kg6 Rb7 72. Kf6 {With the idea g6.} Rb8 73. g6 {Black must now prevent g7+.} Rf1 74. Rc6 Kg8 {Threatens to win with ...Rf8+.} 75. g7 Rf2 76. Ra6 Rf1 77. Rc6 Rf2 78. Ra6 Rf1 {Weighted Error Value: White=0.16/Black=0.16} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.19"] [Round "4.5"] [White "Li, Ben"] [Black "Jacobson, Brandon"] [Result "0-1"] [ECO "E92"] [WhiteElo "2376"] [BlackElo "2504"] [Annotator "TA"] [PlyCount "104"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,104,8,7,7,18,3,9,11,16,1,28,24,21,19,19,-8,-3,-11,-8,-6,-8,-5,-10, -23,-15,-20,-17,-8,0,-49,-69,-74,-66,-81,-71,-64,-61,-72,-90,-174,-150,-204, -200,-375,-375,-379,-356,-688,-692,-926,-862,-1020,-873,-966,-950,-859,-839, -1332,-800,-1285,-1694,-1676,-1698,-1659,-1650,-1465,-1654,-1604,-1613,-1235, -1167,-1861,-3381,-1979,-2500,-2417,-2052,-2610,-2415,-6008,-7481,-12840, -12840,-29988,-29989,-29989,-29989]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. h3 e5 7. d5 a5 8. Bg5 Na6 9. Be2 Qe8 10. Nd2 Nd7 11. a3 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} f6 12. Bh4 Nb6 13. b3 {The position is equal.} Bh6 14. O-O {[#]} Qf7 $146 ({Predecessor:} 14... Bd7 15. Rb1 Nc5 16. Qc2 f5 17. b4 axb4 18. axb4 Nxe4 19. Ndxe4 fxe4 20. c5 Na4 21. Nxe4 {1/2-1/2 (34) Dydyshko,V (2585)-Vajda,L (2557) Slovakia 2010}) 15. Rb1 f5 16. b4 Qg7 17. Qc2 axb4 18. axb4 g5 19. Bg3 f4 $1 {Strongly threatening ...g4.} 20. Bh2 g4 21. Bxg4 Bxg4 22. hxg4 Qxg4 23. f3 Qg6 $40 {[%mdl 128] Black is up to no good.} 24. Rf2 (24. c5 $5 dxc5 25. bxc5 Nxc5 26. Nb5 $11) 24... Kh8 25. Na4 Bg5 26. Nf1 Bh4 {aiming for ...Nxa4.} 27. Rd2 Rg8 28. Nxb6 cxb6 {White is on the road to losing.} 29. Qc3 (29. Kh1 $17) 29... Rg7 30. Qa3 {[#]} (30. Re2 $17) 30... Rag8 $1 $19 31. c5 $2 (31. Rc2 ) 31... bxc5 32. bxc5 Nxc5 33. Ra1 $2 (33. Qc3) 33... Qh5 34. Raa2 Rg6 35. Qc3 Rf6 36. Rdc2 Bg3 37. Bxg3 fxg3 38. Ne3 {[#]} Nxe4 $1 {[%mdl 512]} 39. Qe1 (39. Qa1 Ng5) 39... Ng5 40. Qd1 {[#]} Rxf3 $1 {[%mdl 576] Demolition} 41. gxf3 Nxf3+ 42. Kg2 {[#]} Rf8 $1 {( -> ...Qh2+)} ({Don't go for} 42... e4 $2 43. Qa1+ Ne5 44. Kg1 $18) 43. Qh1 Nh4+ 44. Kg1 g2 45. Qxh4 Qxh4 {[%csl Gg2][%CAl Rh4h1]} 46. Nxg2 Qd4+ 47. Kh2 Qxd5 48. Rd2 Qe6 49. Rdc2 e4 50. Re2 d5 51. Ra7 Qd6+ 52. Kg1 Qb6+ {Weighted Error Value: White=1.26/Black=0.15} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.20"] [Round "5.1"] [White "Brodsky, David"] [Black "Li, Ben"] [Result "1-0"] [ECO "C45"] [WhiteElo "2455"] [BlackElo "2376"] [Annotator "TA"] [PlyCount "87"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,87,-13,20,9,40,25,23,0,0,0,0,0,-9,-23,-14,-36,-30,-26,-28,-62,-58, -50,-33,-59,-39,-38,-33,-23,-23,-28,-28,-35,-29,-30,-22,-45,-20,-20,-15,-22, -16,-17,-4,-10,0,0,270,261,263,259,256,276,269,270,330,323,322,322,830,812,879, 861,5369,3684,2861,2398,29969,29970,29969,29971,29955,12798,29985,29974,29986, 29987,29985,511]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Nge7 (6... Nf6 {looks sharper.} 7. Bd3 O-O 8. O-O Re8 9. a4 a5) 7. Bg5 { C45: Scotch Game.} h6 8. Bh4 d6 9. a4 {White has an edge.} a6 10. Nd5 Ba7 $1 { [#]} 11. Bc4 $146 {Threatening Qh5.} ({Predecessor:} 11. Qd2 Be6 12. Be2 O-O 13. O-O Bxd5 14. exd5 Ne5 15. Nd4 Qd7 16. Bxe7 Qxe7 17. a5 {1-0 (48) De Homont, R (2108)-Maetzig,R (1982) GER email 2013}) 11... Qd7 12. O-O Nxd5 13. exd5 Ne5 14. Be2 O-O 15. Kh1 Ng6 16. Bg3 Qf5 17. Qd2 Qf6 18. c4 Re8 19. c5 Bf5 20. cxd6 cxd6 21. Na5 Re7 22. Nc4 Rd8 23. Bd3 Bxd3 24. Qxd3 h5 25. h3 $1 h4 26. Bh2 Bc5 27. Rab1 Bb4 28. Ne3 {aiming for Ng4.} a5 $2 {[%mdl 8192] [#] White stays focused until the end.} (28... Ne5 $11 29. Qf5 Qg6) 29. Ng4 $1 $18 {[%CAl Rg4f6]} Qg5 {[#]} 30. f4 $1 {[%CAl Rf4g5]} Qh5 31. f5 Ne5 32. Bxe5 dxe5 33. f6 Red7 34. fxg7 Be7 (34... Kxg7 35. Rf5 Rxd5) 35. Rf5 Qh7 {[#]} 36. Qe3 $1 { [%mdl 512] Threatening mate with Nh6+.} f6 (36... Qxg7 37. Nh6+) 37. Rbf1 Qxg7 38. Rxf6 Bxf6 39. Nxf6+ Kh8 40. Rf5 Qg6 41. Qxe5 Rf7 42. Rh5+ {[%mdl 64] Double Attack. White mates.} Kg7 43. Ne8+ {[%mdl 64] Discovered Attack (Double check)} Kf8 44. Rh8+ {Weighted Error Value: White=0.05/Black=0.61} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.20"] [Round "5.2"] [White "Jacobson, Brandon"] [Black "Wang, Justin"] [Result "1/2-1/2"] [ECO "E16"] [WhiteElo "2504"] [BlackElo "2467"] [Annotator "TA"] [PlyCount "79"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,79,11,0,17,0,0,12,4,0,2,11,8,0,24,29,29,23,24,22,24,26,16,18,29,28, 32,0,11,0,10,0,8,8,18,17,12,0,0,0,0,-203,-214,-205,-13,-21,-25,-29,-29,-31,-29, -29,-16,-12,-11,-8,-8,-5,-10,-9,-10,-9,-6,-8,-9,-13,0,-6]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Bb4+ 5. Nd2 O-O 6. Ngf3 b6 $1 {6...b6 scores better than 6... dxc4.} 7. O-O Bb7 8. Ne5 Nc6 {[#] E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+.} 9. Nb1 $146 ({Predecessor:} 9. Nxc6 Bxc6 10. Qc2 Bb7 11. cxd5 exd5 12. Nf3 Re8 13. Bf4 Bd6 14. e3 Ne4 15. Rfd1 Bxf4 16. gxf4 {0-1 (161) Korchmar,V (2814) -Sargsyan,S (2959) Chess.com INT 2019}) 9... Bd6 10. Nxc6 Bxc6 11. Bg5 Be7 12. Nc3 Qd7 13. cxd5 Nxd5 (13... exd5 {looks sharper.} 14. Rc1 Bb7 15. e3 c6 16. Bf3 h6) 14. Bxe7 Nxe7 15. Bxc6 Nxc6 16. e3 Rfd8 17. Qh5 Rac8 18. Rac1 Ne7 19. Rfd1 Nd5 20. Ne4 h6 21. a3 Qb5 22. Rc2 c5 23. Rdc1 f5 24. Nd2 Nf6 25. Qf3 Qa6 26. dxc5 Rxc5 27. Nb3 {[#]} (27. Rxc5 $11 {and White stays safe.} bxc5 28. Nc4) 27... Rxc2 $19 28. Rxc2 e5 (28... Qd3 $19 29. Rd2 Qb1+ 30. Kg2 Rxd2 31. Nxd2 Qxb2) 29. Qe2 Qxe2 30. Rxe2 $11 {[%mdl 4096] Endgame KRN-KRN} Rd3 31. Nd2 e4 32. Nc4 Rd1+ 33. Kg2 {The position is equal.} Nd7 34. f3 Nc5 35. fxe4 Nxe4 36. Ne5 Rc1 37. Nd3 Rc7 38. Nf2 Nd6 39. Kf3 Kf7 40. e4 {Weighted Error Value: White=0.16/Black=0.16} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.20"] [Round "5.3"] [White "Yoo, Christopher Woojin"] [Black "Balakrishnan, Praveen"] [Result "0-1"] [ECO "D43"] [WhiteElo "2479"] [BlackElo "2507"] [Annotator "TA"] [PlyCount "84"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 23,84,8,22,21,16,24,9,21,24,0,0,0,0,0,0,0,0,-3,-7,-21,-15,-16,2,0,10,12, 8,0,60,47,28,-16,-11,-7,0,-18,-12,-30,0,0,0,-207,-145,-208,-209,-250,-252,-428, -412,-522,-472,-955,-952,-935,-920,-29986,-29987,-29989,-29990,-29991,-29992, -29992,-29993]} 1. d4 {Lutz,C} d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Bd3 dxc4 9. Bxc4 Bd6 10. O-O Qe7 11. e4 {11.Qd3 is the recent fashion.} e5 12. d5 Nb6 13. dxc6 {D43: Semi-Slav: 5 Bg5 h6.} bxc6 14. Be2 O-O 15. Qc2 {The position is equal.} Bg4 {[#]} 16. Nd1 $146 ({Predecessor: } 16. Rac1 Rac8 17. Nd1 c5 18. Ne3 Bxf3 19. Bxf3 c4 20. Be2 c3 21. bxc3 Bc5 22. Nf5 {1/2-1/2 (70) Mikhalevski,V (2531)-Kharlov,A (2638) Moscow 2002 CBM 088 [Lutz,C]}) 16... Bc5 17. Rc1 Bxf3 18. Bxf3 Bd4 19. Qe2 c5 20. Ne3 g6 21. g3 Qe6 22. b3 a5 23. Nc2 Rfd8 24. Nxd4 cxd4 25. Qb5 {Hoping for Rc6.} Rd6 (25... Nc8 $11) 26. Rc5 Nd7 27. Rd5 (27. Rc7 {keeps more tension.} a4 28. Bd1 Rb8 29. Qxa4 Nf6 30. Qa7) 27... Rxd5 28. exd5 Qf5 29. Be2 Rb8 30. Qc6 Nf6 31. Bc4 $1 e4 32. d6 $2 {[#]} (32. f3 $1 $11 {and White stays safe.} exf3 33. d6) 32... d3 $19 33. Qc7 (33. d7 $17) 33... Rf8 34. Qb7 h5 35. Qb5 $2 (35. Qb6 {was necessary.} Qh3 36. f3) 35... Qh3 36. f3 exf3 {[#] ( -> ...Qg2#)} 37. Rxf3 (37. Rf2 $142 Ng4 38. Bxd3 Nxf2 39. Bf1) 37... Ng4 38. Bxf7+ Kg7 39. Rf2 Nxf2 {Black mates.} 40. Qe5+ Kxf7 41. Qe7+ Kg8 42. d7 Qf5 {Weighted Error Value: White=0.53/ Black=0.07} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.20"] [Round "5.4"] [White "Niemann, Hans Moke"] [Black "Burke, John M"] [Result "1/2-1/2"] [ECO "A16"] [WhiteElo "2571"] [BlackElo "2538"] [Annotator "TA"] [PlyCount "64"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,64,17,46,21,29,35,24,0,1,8,15,15,14,7,0,0,7,0,0,-22,-26,-33,-31,-49, -25,-11,-18,-13,-25,-21,-21,-21,-20,-32,-25,-24,-27,-9,-6,-7,50,-19,-19,-19, -19,-19,-19,-20,-20,-21,-20,-20,-20,-25,-25,-47,0]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. h4 Nxc3 6. dxc3 {A16: English Opening: 1...Nf6 with ...d5.} (6. bxc3 {looks sharper.} c5 7. h5 Bg7 8. e3 Nc6 9. Bb5) 6... Qxd1+ 7. Kxd1 h5 8. Bf4 {White has an edge.} f6 9. Bxc7 Na6 {[#]} 10. Bf4 $146 ({Predecessor:} 10. Bg3 Bf5 11. Nd4 O-O-O 12. Kc1 Nc5 13. Nxf5 gxf5 14. e3 Bh6 15. Bc4 e5 16. Kc2 {1-0 (39) Korobov,A (2678)-Sutovsky,E (2647) Poikovsky 2018}) 10... e5 11. Be3 Bc5 12. Bxc5 Nxc5 13. Nd2 Be6 14. f3 O-O-O 15. Kc2 Rd6 {[%mdl 1024] Black has compensation.} 16. b3 Rhd8 (16... e4 $5 17. e3 Bf5 $15) 17. Rd1 e4 18. e3 Bf5 $1 {aiming for ...exf3+.} 19. Kc1 Nd3+ 20. Bxd3 Rxd3 {[%mdl 64] [#] Double Attack} 21. fxe4 Bg4 22. Nf3 Rxc3+ 23. Kb2 Rxd1 24. Rxd1 Bxf3 (24... Rxe3 $11 25. Re1 Rd3) 25. gxf3 (25. Re1 $1 $14 Rd3 26. gxf3) 25... Rxe3 $11 {[%mdl 4096] Endgame KR-KR} 26. Rg1 Rxf3 27. Rxg6 Rf4 28. Rg8+ Kd7 29. Rg7+ Kc6 30. Rg6 Kc5 31. Rh6 Rxh4 32. Rxf6 Rxe4 {Weighted Error Value: White=0.10/Black=0.06} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.20"] [Round "5.5"] [White "Checa, Nicolas"] [Black "Hong, Andrew"] [Result "1-0"] [ECO "D27"] [WhiteElo "2552"] [BlackElo "2474"] [Annotator "TA"] [PlyCount "93"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,93,7,0,0,20,0,21,19,14,16,18,18,19,16,47,0,0,0,0,0,0,0,0,0,0,0,0,0, 59,-19,-19,-20,-20,-20,-20,-20,-21,-22,-18,-19,72,28,55,0,1367,1360,1360,1360, 1243,12835,6307,6183,2649,1254,29978,29980,29978,29976,29969,5314,5812,5289, 5289,1414,6175,6175,1764,1515,29983,29984,29984,29985,29985,29986,29986,29987, 29987,29988,29990,29991]} 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. Nc3 b5 8. Bb3 Bb7 9. e4 $1 {[%mdl 4] outshines the older 9.Qe2. D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} cxd4 10. Nxd4 Bd6 {[#]} 11. Bxe6 $146 {The position is equal.} ({Predecessor:} 11. Re1 Be5 12. Be3 Qd6 13. Nf3 Qxd1 14. Nxd1 Bc7 15. Rc1 Nc6 16. Bd2 Rd8 17. a4 Bb6 18. axb5 axb5 19. Re2 {1-0 (20) Priehn,P-Schiklang,M DESC email 2005}) 11... fxe6 12. Nxe6 {[%mdl 64] Double Attack} Qd7 {[#]} 13. Nxg7+ Qxg7 14. Qxd6 {Strongly threatening Nd5.} Rg8 {[%csl Gg8][%CAl Rg7g2]} 15. g3 Nc6 {[%CAl Bb8c6,Bc6d4, Bd4c2][%mdl 32]} 16. Nd5 Nxd5 17. exd5 Qe7 18. Qh6 Nd4 19. Qh5+ Rg6 $1 { Hoping for ...Rd8.} 20. Be3 Nc2 {[%mdl 64] Double Attack} 21. Rac1 {[%CAl Rc1c2]} Rc8 ({Black should try} 21... Nxe3 $11 22. Rfe1 {[%mdl 64] [#] Pin} Kf8 $1 23. Rxe3 Qd7) 22. Bd2 (22. Ba7 $1 $14) 22... Qd7 $11 23. Bc3 {[#]} b4 $1 24. Rxc2 bxc3 25. Re1+ Kf8 26. Re5 cxb2 27. Rxb2 {Threatens to win with Qf5+.} Rf6 (27... Kg8 $11 {keeps the balance.}) 28. Qg5 $36 {[%mdl 2048] White has some pressure.} Rf7 29. Rb4 (29. Rb1 $14) 29... Qd6 $2 {[%mdl 8192] [#] Black is on the road to losing.} (29... Rg7 $11 30. Qh5 Rf7) 30. Rxb7 $1 $18 {[%mdl 576] Deflection} Rxb7 31. Qf5+ {[%mdl 64] Double Attack} Kg7 32. Qg4+ Qg6 33. Qxc8 { [%mdl 4096] Endgame KQR-KQR} Rf7 34. Qc3 Kf8 35. Re6 Qb1+ 36. Kg2 {[%CAl Rc3h8] } Kg8 37. Re8+ Rf8 38. Rxf8+ Kxf8 {KQ-KQ} 39. Qc8+ Kg7 40. Qd7+ Kf8 41. Qd6+ Kg7 42. Qe7+ {White mates.} Kg6 43. d6 Qxa2 44. Qe4+ Kf7 45. d7 Qd2 46. Qe8+ Kg7 47. d8=Q {Weighted Error Value: White=0.10/Black=0.33} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.22"] [Round "6.1"] [White "Balakrishnan, Praveen"] [Black "Hong, Andrew"] [Result "1/2-1/2"] [ECO "C78"] [WhiteElo "2507"] [BlackElo "2474"] [Annotator "TA"] [PlyCount "77"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,77,42,39,0,16,22,5,2,22,-22,-16,-17,-18,-37,-36,-37,-35,-30,-39,-18, -29,-38,-41,-122,-111,-122,-117,-103,-106,-284,-285,-534,-320,-317,-314,-294, -291,-283,-217,-202,0,-72,0,-75,0,-155,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. a4 Rb8 8. c3 d6 9. d4 Bb6 $1 10. a5 {C78: Ruy Lopez: Archangelsk and Möller Defences.} Ba7 (10... Bxa5 $2 11. dxe5 (11. d5 Ne7 $18) 11... Ng4 12. Bg5 $18) 11. h3 Bb7 12. Re1 O-O 13. Be3 exd4 $1 (13... Nxe4 $6 14. d5 $16) 14. cxd4 {With the idea d5.} Nb4 { 14...Ne7 injects fresh life into this line.} (14... Nxe4 15. d5 $16) 15. Bg5 h6 16. Bh4 c5 17. Qd2 Re8 18. Nc3 c4 {[#]} 19. Bc2 $146 ({Predecessor:} 19. Bd1 Nd3 20. Re2 Re6 21. d5 Re8 22. Bc2 b4 23. Na4 Nxb2 24. Nxb2 c3 25. Qd3 cxb2 { 0-1 (68) Psyk,R (2375)-Janik,I (2489) Pokrzywna 2020}) 19... Nxc2 20. Qxc2 g5 $1 $36 {[%CAl Rg5h4][%mdl 2048] Black is in control.} 21. Nxg5 hxg5 22. Bxg5 b4 $1 {[%CAl Rb4c3]} ({And not} 22... Bxd4 23. Rad1 $16) 23. e5 $2 dxe5 $19 (23... bxc3 24. Bxf6 Bxd4 25. Qf5 $18) 24. dxe5 $2 {[#]} (24. Qf5 Re6 25. dxe5) 24... Qd3 $1 25. Qxd3 cxd3 26. Bxf6 bxc3 27. Ra4 {Threatening mate with Rh4.} Kh7 ({ Worse is} 27... cxb2 28. Rh4 Bxf2+ 29. Kxf2 Kf8 30. Rh8#) 28. bxc3 Rg8 $2 ( 28... Bc6 $19 29. Rf4 d2) 29. Rh4+ $11 Kg6 {Hoping for ...Kf5.} 30. Rf4 {[#]} ( 30. g4 $1 $11) 30... Rgc8 (30... Bc8 $1 $17 31. Rd1 Bf5) 31. c4 $2 {[#]} (31. Rd1 $1 $11 Rxc3 32. e6) 31... Bd5 $2 32. Rg4+ {The position is equal.} Kh7 $1 33. Rh4+ Kg6 34. Rg4+ Kh7 $1 35. cxd5 d2 36. Rh4+ $1 Kg6 37. Rg4+ Kh7 (37... Kh5 $5 38. Rh4+ $8 Kg6 39. Rg4+ Kh5 40. Rh4+ Kg6 $11) 38. Rh4+ $1 Kg6 39. Rg4+ {Black had all chances to win. Weighted Error Value: White=0.28/Black=0.21} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.22"] [Round "6.2"] [White "Wang, Justin"] [Black "Brodsky, David"] [Result "1/2-1/2"] [ECO "D31"] [WhiteElo "2467"] [BlackElo "2455"] [Annotator "TA"] [PlyCount "75"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,75,23,14,18,37,3,15,0,0,0,19,0,0,0,9,21,22,0,0,0,0,0,0,0,39,0,0,0,0,0, 6,6,6,6,9,7,7,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,2,3,3,8,3,3,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nf3 a6 4. cxd5 exd5 5. Nc3 c6 6. Bf4 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6.} Bd6 7. Qd2 Nf6 {[#]} 8. e3 $146 ({ Predecessor:} 8. Ne5 O-O 9. e3 Bf5 10. f3 Nh5 11. g4 Nxf4 12. gxf5 Qh4+ 13. Kd1 Nh5 14. Rg1 {1-0 (26) Kuzubov,Y (2642)-Pap,G (2535) Chess.com INT 2021}) 8... Bxf4 9. exf4 Ne4 10. Nxe4 dxe4 11. Ne5 f6 12. Nc4 O-O 13. Ne3 Be6 14. f5 Bf7 15. Bc4 Nd7 {[%CAl Bb8d7,Bd7e5,Be5d3][%mdl 32]} 16. b3 {[%CAl Bb2b3,Bb3b4] [%mdl 32]} c5 17. Be6 cxd4 {The position is equal.} 18. Qxd4 Ne5 19. Qxe4 Qa5+ 20. b4 Qb5 21. a4 Qd3 22. Bxf7+ Rxf7 23. Qxd3 Nxd3+ 24. Ke2 Nxb4 25. Rhd1 Rc8 26. Rd2 Re7 27. Rad1 Nc2 28. Rd8+ Rxd8 29. Rxd8+ $11 {[%mdl 4096] Endgame KRN-KRN} Kf7 30. Kf3 Nxe3 31. fxe3 {KR-KR} b5 32. axb5 axb5 33. Rb8 Re5 34. e4 Rc5 35. Rb7+ Kf8 36. h3 Rc3+ 37. Kf4 Rb3 38. Rb8+ {An uneventful encounter. Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.22"] [Round "6.3"] [White "Li, Ben"] [Black "Niemann, Hans Moke"] [Result "0-1"] [ECO "E12"] [WhiteElo "2376"] [BlackElo "2571"] [Annotator "TA"] [PlyCount "68"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 18,68,31,25,31,22,11,18,19,-25,-40,-39,-35,-40,-40,-40,-40,-46,-53,-43, -41,-43,-39,-54,-55,-96,-99,-102,-103,-151,-143,-152,-121,-415,-408,-29978, -29979,-29978,-29979,-29990,-29991,-29992,-29993,-29993,-29994,-29994,-29995, -29996,-29997,-29997,-29998,-29998,-29999]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Ba6 5. Qc2 Bb7 6. Nc3 c5 7. e4 cxd4 8. Nxd4 Bc5 {8...Nc6 might become the main line.} 9. Nb3 Nc6 10. Bf4 O-O {has lost popularity (10...e5). E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} 11. Rd1 e5 12. Bg5 h6 $5 {[%mdl 4] The position is equal. Exploring less charted territory.} 13. Bh4 (13. Bxf6 $5 Qxf6 14. Rxd7 $14 (14. Nxc5 bxc5 15. Bd3 Nd4 $15)) 13... Nd4 14. Nxd4 exd4 15. Nd5 g5 16. Bg3 {[#]} Nxe4 $1 17. Bd3 ({ But not} 17. Qxe4 $2 Re8 $19) 17... Bxd5 18. cxd5 Nxg3 19. hxg3 Re8+ 20. Kf1 Qf6 $36 {[%mdl 2048] [#] Black fights for an advantage.} 21. Bf5 $146 ({ Predecessor:} 21. g4 Re7 22. Rh3 Re3 23. Bf5 Rxh3 24. gxh3 Re8 25. Re1 Rxe1+ 26. Kxe1 d3 27. Bxd3 {1-0 (42) Farago,I (2513)-Sakelsek,T (2432) Austria 2006}) 21... d3 22. Qxd3 Qxb2 {[%csl Gc5][%CAl Rb2f2]} 23. Qf3 {[#]} Kg7 ({And not} 23... Bxa3 24. Rxh6 Bc5 25. Rh5 $16 (25. Bxd7 Kg7 $11)) 24. Bxd7 Re7 25. Bc6 { [%mdl 8192]} (25. Bf5 $17) 25... Rd8 $19 {[%CAl Ba8d8,Bd8d6,Bd6f6][%mdl 32] Hoping for ...Rd6.} 26. a4 (26. Re1 $19 Rxe1+ 27. Kxe1) 26... Rd6 {Black mates. } 27. Kg1 Rf6 28. Qg4 Rxf2 29. Kh2 Rxg2+ 30. Kh3 Ree2 31. Qf3 h5 32. Qxg2 g4+ 33. Kh4 Qf6+ 34. Kxh5 Qg6+ {Black took control after the opening. Weighted Error Value: White=0.55/Black=0.01} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.22"] [Round "6.4"] [White "Burke, John M"] [Black "Checa, Nicolas"] [Result "1/2-1/2"] [ECO "C13"] [WhiteElo "2538"] [BlackElo "2552"] [Annotator "TA"] [PlyCount "63"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 13,63,12,15,1,14,17,24,-16,-15,-8,12,8,19,17,17,18,28,21,28,22,20,10,18, 15,18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 5. Nxe4 Be7 6. Bxf6 Bxf6 7. Nxf6+ Qxf6 8. Qd3 { C13: French: Classical System: 4 Bg5 Be7, Alekhine-Chatard Attack.} O-O 9. O-O-O Rd8 10. Qc3 {[#] White has an edge.} e5 $146 ({Wrong is} 10... Qxf2 $2 11. Nf3 $18) ({Predecessor:} 10... Nc6 11. Nf3 Bd7 12. Bd3 Rac8 13. Rhe1 Ne7 14. Ne5 Bc6 15. Nxc6 Nxc6 16. Be4 Nxd4 17. Bxb7 {0-1 (25) Golubev,M (2461) -Bluebaum,M (2670) Chess.com INT 2021}) 11. Nf3 exd4 (11... e4 {is interesting. } 12. Ne5 Be6 13. Qe3 c5 14. Qxe4 Bd5) 12. Rxd4 Rxd4 13. Nxd4 Nc6 14. Nxc6 { [#] And now Qxf6 would win.} Qxc3 15. bxc3 {Strongly threatening Nd8.} bxc6 $11 {[%mdl 4096] Endgame KRB-KRB} 16. Bc4 Kf8 {The position is equal.} 17. Re1 Bd7 18. Re5 a5 19. Kb2 f6 20. Rh5 h6 21. Rh4 Ke7 22. Re4+ Kd6 23. Rd4+ Ke7 24. Be2 Be6 25. Ka3 Rb8 26. Ra4 Ra8 27. Rd4 Rb8 28. Bc4 {[#] Black must now prevent Re4.} Bxc4 29. Rxc4 Kd6 30. Rd4+ Ke6 31. Re4+ Kd6 32. Rd4+ {Not much happened in this game. Weighted Error Value: White=0.05/Black=0.02} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.22"] [Round "6.5"] [White "Yoo, Christopher Woojin"] [Black "Jacobson, Brandon"] [Result "0-1"] [ECO "C54"] [WhiteElo "2479"] [BlackElo "2504"] [Annotator "TA"] [PlyCount "78"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 17,78,0,0,-2,0,-2,6,-23,-18,-32,-29,-29,0,0,0,-20,-1,-15,-6,-6,-19,-21, 68,75,65,57,83,57,81,73,68,0,0,0,0,0,0,0,0,0,0,-29,-41,-87,-91,-115,-103,-114, -94,-116,-114,-175,-90,-370,-443,-378,-349,-1261,-1235,-29990,-29991,-29998, -29999]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Nc3 O-O 10. Be3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} Bg4 11. h3 Bh5 12. Qa4 {The position is equal.} Ne7 13. Bd3 Nxc3 14. bxc3 {[#]} c5 $146 (14... Bxf3 $5 15. gxf3 Rc8 $11) ({Predecessor: } 14... Bg6 15. Qc2 Qd7 16. a4 c6 17. O-O Bxd3 18. Qxd3 Qf5 19. Qe2 Ng6 20. Nh2 Bc7 {1-0 (45) Shvedova,A (1578)-Pawicka,M (1826) Mamaia 2017}) 15. dxc5 Ba5 16. Rc1 Bxf3 17. gxf3 Nc6 18. Ke2 $36 {[%mdl 2048] White is pushing.} Nxe5 19. Rhd1 Bc7 {[#]} (19... Qc7 $11) 20. Be4 $1 $14 Qh4 21. Rxd5 Kh8 22. Rd4 Qh5 $1 23. Rg1 Rae8 24. h4 ({White should play} 24. Rb4 $14) 24... h6 $1 $11 25. Bxb7 f5 26. Kd2 (26. Qxa7 $2 f4 $19) 26... Nxf3+ 27. Bxf3 Qxf3 28. Qd7 {[%csl Gg1] [%CAl Rd7g7]} ({But not} 28. Qxa7 $2 Ra8 $1 $19) 28... Be5 29. Qd5 ({Don't go for} 29. Qxa7 $2 f4 $19) 29... Qh5 {White must now prevent ...f4.} 30. Rd3 Qxh4 31. Rh1 Qf6 {Threatens to win with ...Rd8.} 32. Bd4 Qg5+ 33. Be3 Bf4 34. Re1 { [#]} (34. Kc2 $17 {was worth a try.}) 34... Rd8 (34... Bxe3+ $1 $19 35. Rexe3 Rb8) 35. Qc4 $2 {[%mdl 8192] Now White is beyond hope.} (35. Qe5 $17 Bxe3+ 36. Rexe3) 35... Bxe3+ $19 36. Rexe3 Qg1 {And now ...Rb8 would win.} 37. c6 $2 (37. Qf4 Qb1 38. Rh3 Qxa2+ 39. Kd1) 37... Rb8 {[%CAl Rb8b2]} 38. Rf3 Rfe8 {[%CAl Rb8b2]} 39. Rde3 Rb2+ {Weighted Error Value: White=0.67/Black=0.10} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.23"] [Round "7.1"] [White "Hong, Andrew"] [Black "Burke, John M"] [Result "1/2-1/2"] [ECO "C88"] [WhiteElo "2474"] [BlackElo "2538"] [Annotator "TA"] [PlyCount "85"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 19,85,17,24,9,9,9,7,12,9,7,8,0,0,-31,49,50,31,28,36,40,52,28,72,45,52,0, 0,0,0,0,0,0,210,202,200,184,193,200,131,0,0,0,293,275,276,295,275,264,292,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 Bb7 9. d3 d6 10. Bd2 Qd7 11. Na3 {C88: Closed Ruy Lopez: Anti-Marshall Systems.} Nd4 12. Nxd4 exd4 13. c3 dxc3 $1 14. bxc3 c5 15. Bc2 Rfe8 {[#]} 16. f3 $146 ({Predecessor:} 16. d4 d5 17. e5 Ne4 18. f3 Nxd2 19. Qxd2 b4 20. cxb4 cxb4 21. Qd3 g6 22. Nb1 {1-0 (41) Kurka,F-Marman, V Prague 1978}) 16... Bd8 (16... d5 $15) 17. Rb1 {[%CAl Ra4b5]} Bc6 {[%CAl Rb5a4]} 18. d4 cxd4 19. cxd4 bxa4 20. Bd3 Qe7 21. Qc2 (21. d5 $5 {[%CAl Rd5c6]} Bd7 22. Rb7 $16) 21... Bd7 22. Rb7 ({White should play} 22. Bf1 $14) 22... d5 $1 $11 23. e5 $36 {[%mdl 2048] White has the initiative.} Qxa3 24. exf6 Rxe1+ 25. Bxe1 Qa1 $2 {[#]} 26. Kf1 $1 $18 (26. Bxh7+ Kh8 $15) 26... Bxf6 {Strongly threatening ...Re8.} (26... Bb5 $2 27. Rxb5 axb5 28. Qc6 $18) 27. Rxd7 (27. Bxh7+ Kh8 $11) 27... Re8 {[%csl Ge8][%CAl Ra1e1]} 28. Qb1 (28. Bxh7+ Kh8 $11) 28... Qxd4 29. Bxh7+ ({White should try} 29. Bf2 $16 Qf4 30. Rxd5 (30. Bxh7+ Kh8 $15) 30... Qxh2 31. Qb4 (31. Bxa6 Qh1+ 32. Bg1 Qh4 $16)) 29... Kh8 $11 { ...a3 is the strong threat.} 30. Be4 $1 {[%mdl 64] [#] Pin} Qc4+ {[%mdl 8192]} (30... a3 $1 $11 {and Black has nothing to worry.} 31. Rxd5 Qc4+ 32. Kf2 a2 33. Rh5+ Kg8 34. Bh7+ Kh8 35. Be4+ Kg8 36. Bh7+ Kh8 37. Be4+) 31. Bd3 $18 Qf4 32. Bg3 (32. Bxa6 $2 Qxh2 33. Qb4 Qh1+ 34. Kf2 Bh4+ 35. g3 Qh2+ 36. Kf1 Qh3+ 37. Kg1 Bxg3 $19) 32... Qd4 {Threatening ...a3.} 33. Bf2 (33. Rxf7 a3 $15) 33... Qf4 {White should prevent ...a3.} 34. Rxf7 $2 ({Better is} 34. Rxd5 $18 g6 35. Bg3) 34... a3 $1 $11 {[%CAl Ra3a2] White must now prevent ...a2.The position is equal.} 35. Kg1 (35. Bxa6 $2 a2 $19) 35... Qd2 {And now ...a2 would win.} 36. Rxf6 $1 gxf6 37. Bf1 {aiming for Qb6.} ({Avoid the trap} 37. Bxa6 $2 a2 $19 ) 37... a2 38. Qg6 {[%CAl Rg6e8]} Re6 39. Qf7 a1=Q 40. Qf8+ $1 Kh7 41. Qf7+ Kh8 42. Qf8+ $1 Kh7 {( -> ...Qxf1+!)} 43. Qf7+ {Weighted Error Value: White=0.14/ Black=0.25} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.23"] [Round "7.2"] [White "Brodsky, David"] [Black "Yoo, Christopher Woojin"] [Result "1-0"] [ECO "B12"] [WhiteElo "2455"] [BlackElo "2479"] [Annotator "TA"] [PlyCount "89"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,89,27,34,20,22,31,49,37,53,50,44,22,29,0,0,0,2,0,0,0,8,0,0,0,0,0,1, -12,13,5,12,8,6,10,8,15,56,46,40,74,61,33,30,0,141,131,279,157,254,166,396,388, 616,590,464,539,1040,622,29958,29960,29966,29967,29967,29964,29962,29963,12070, 11665,29986,29987,29987,29988,29987,29988,29988,29989]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 cxd4 7. Nxd4 Ne7 8. O-O $1 {[%mdl 4] outshines the older 8.Nd2.} Nbc6 9. Bb5 {B12: Caro-Kann: Advance Variation.} a6 10. Bxc6+ Nxc6 11. Nxf5 {White is slightly better.} exf5 12. c3 Be7 13. f4 O-O 14. Qd3 f6 15. exf6 ({Of course not} 15. Qxf5 fxe5 16. Qg4 (16. Qe6+ Kh8 $17) 16... d4 $17 ) 15... Bxf6 {[#]} 16. Na3 $146 ({Predecessor:} 16. Rd1 d4 17. cxd4 Re8 18. Bf2 Bxd4 19. Kf1 Qc7 20. Qc4+ Qf7 21. Rxd4 Nxd4 22. Qxd4 {0-1 (38) Reina Guerra,E (1902)-Hofer,R (2291) ICCF email 2010}) 16... d4 17. cxd4 Bxd4 18. Rad1 Bxe3+ 19. Qxe3 Qf6 20. Rd7 b5 21. Rfd1 Rad8 22. Nc2 h6 23. Qc5 Rxd7 24. Rxd7 { White wants to play Qd5+.} Rd8 25. Qd5+ Kh8 26. Rxd8+ Nxd8 27. Nd4 g6 28. h4 Nf7 $1 29. Ne6 h5 (29... Qxb2 $11 30. h5 gxh5) 30. Qd7 $16 Kg8 {A mistake that costs the game.} (30... Nh6 $16) 31. Qe8+ $18 Kh7 32. Kf1 Nh8 $2 {[#]} (32... b4 {was called for.} 33. Kg1 a5) 33. g3 b4 (33... a5 $142 34. Ng5+ Kg7 35. Qxb5 Qd6 36. Qxa5 Nf7 37. Qc3+ Kf8) 34. Ke1 a5 35. Kd1 a4 36. Kc2 a3 37. Ng5+ Kg7 38. Qd7+ Kg8 39. Qc8+ Kg7 40. Qc7+ Kg8 41. bxa3 Qa1 42. Qd8+ {White mates.} Kg7 43. Qe7+ Kg8 44. Qe8+ Kg7 45. Ne6+ {Weighted Error Value: White=0.15/Black=0.81 } 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.23"] [Round "7.3"] [White "Niemann, Hans Moke"] [Black "Wang, Justin"] [Result "1/2-1/2"] [ECO "A13"] [WhiteElo "2571"] [BlackElo "2467"] [Annotator "TA"] [PlyCount "104"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 15,104,8,10,0,16,4,13,0,0,0,0,0,0,0,0,7,0,0,59,60,71,61,70,87,101,0,0,0, 0,0,0,0,35,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,36,28,114,18,26,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 {Ribli,Z} Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 c5 7. O-O b6 8. Nc3 Bb7 9. e4 { A13: English Opening: 1...e6.} Rc8 10. Qe2 {[#]} c4 $146 ({Predecessor:} 10... Bd6 11. d4 cxd4 12. Nxd4 O-O 13. Rd1 Qe7 14. Bg5 Be5 15. Be3 Rfd8 16. Rac1 Nc5 {0-1 (61) Lautier,J (2620)-Yermolinsky,A (2605) Tilburg 1993 CBM 039 [Ribli,Z]} ) 11. b3 cxb3 12. axb3 a5 13. e5 Nd5 14. Nd4 Nxc3 15. dxc3 Bxg2 16. Kxg2 Rc5 ({ Better is} 16... Rxc3 $11 17. Bb2 Rc8) 17. f4 $14 Rxc3 18. f5 $1 {Black must now prevent Bb2.} Nc5 {[#]} 19. Bb2 $1 {[%CAl Rb2c3]} Qxd4 {[#]} 20. Bxc3 ({ Only move:} 20. Rf3 $1 $16 Qd7 21. fxe6 (21. Bxc3 Qc6 $16) 21... Nxe6 22. Rxc3) 20... Qxc3 $11 21. Qb5+ {[%mdl 64] Double Attack} Nd7 $1 22. Rad1 {[%csl Gd1] [%CAl Rb5d7]} Qc7 23. Rd3 Bb4 24. f6 g5 25. Kh3 {next Rfd1 is good for White.} Bc5 $1 26. Rfd1 {[%CAl Rd3d7]} O-O $1 27. Rxd7 Qxe5 {Threatens to win with ... Qf5+.} ({Of course not} 27... g4+ $6 28. Kxg4 Qxe5 29. Rf1 $16) 28. Qf1 h5 { ...g4+ is the strong threat.} 29. Re1 g4+ 30. Kh4 Be3 31. Rxe3 $1 Qxe3 { [%mdl 4096] Endgame KQR-KQR} 32. Qb5 Qh6 33. Qg5+ Qxg5+ 34. Kxg5 {KR-KR} Re8 35. Kxh5 e5 36. Kxg4 e4 37. Re7 Rc8 {[#]} (37... Ra8 $1 $11) 38. Rxe4 ({ White should play} 38. Kg5 $1 $16) 38... Kh7 $1 39. h4 Kg6 {The position is equal.} 40. Rf4 Rc5 41. b4 Rb5 42. bxa5 bxa5 {Hoping for ...Rb4.} 43. Kf3 Rf5 44. Rxf5 Kxf5 45. Ke3 Kxf6 {KPP-KPP} 46. Kd4 Kf5 47. h5 Kg5 48. g4 a4 49. Kc3 f5 (49... Kxg4 50. h6 $18) 50. gxf5 Kxf5 51. Kb4 Kg5 52. Kxa4 Kxh5 {Weighted Error Value: White=0.09/Black=0.07} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.23"] [Round "7.4"] [White "Jacobson, Brandon"] [Black "Balakrishnan, Praveen"] [Result "1-0"] [ECO "D15"] [WhiteElo "2504"] [BlackElo "2507"] [Annotator "TA"] [PlyCount "157"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,157,31,31,32,24,32,37,33,31,29,36,20,18,25,24,15,14,16,20,16,20,12,17, 21,15,16,18,14,22,19,17,17,39,35,37,39,33,32,31,32,56,52,63,66,72,79,67,68,92, 66,66,72,102,95,200,211,198,201,201,206,201,201,204,200,239,239,239,239,239, 239,239,239,239,239,326,283,5808,4783,12850,1281,5258,3278,990,93,93,19,27,15, 15,14,14,8,29946,29946,29940,29947,29948,29949,29955,29947,29958,29961,29960, 29962,29960,29964,29964,29962,29960,29962,29962,29963,29963,29963,29964,29966, 29969,29968,29968,29969,29975,29970,29969,29968,29971,29972,29976,29973,29973, 29973,29973,29974,29974,29975,29974,29974,29983,29967,29987,29988,29988,29989, 29993,29994,29995,29996,29996,29990,29997,29998]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 a6 6. Ne5 {D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4.} Nbd7 7. Qb3 Qc7 8. cxd5 {White is slightly better.} Nxe5 9. dxe5 Nxd5 10. Bc4 e6 11. e4 $1 {[%CAl Rc4d5][%mdl 64] Double Attack} Nxc3 12. exf5 Nd5 13. Bxd5 {Bc4 is the strong threat.} Qxe5+ 14. Be3 Qxd5 15. Qxb7 c5 16. Qb6 {[#]} exf5 $146 ({Predecessor:} 16... Be7 17. O-O O-O 18. fxe6 Qxe6 19. Qxe6 fxe6 20. Rac1 Rfb8 21. b3 Rb5 22. Rc4 a5 {1/2-1/2 (46) Potkin,V (2610)-Nyback, T (2603) Germany 2014}) 17. O-O {And now Bg5 would win.} Be7 18. Rfd1 Qe6 { [%CAl Re6b6]} 19. Bxc5 {aiming for Qb7.} Qxb6 20. Bxb6 Rb8 {[#]} 21. Rac1 $1 $36 {[%mdl 2048] White is more active.} O-O 22. Rc6 Rfc8 23. Rdc1 Rxc6 24. Rxc6 $14 {[%mdl 4096] Endgame KRB-KRB} h5 25. Kf1 a5 26. Ke2 a4 27. Bd4 Ra8 28. Kd3 f6 29. Kc4 Kf7 30. a3 Bd8 31. Bc3 Ke7 (31... Ba5 $16) 32. Kb5 $1 $18 Kd7 { White must now prevent ...Rb8+.} 33. Rc4 Bc7 34. h3 ({Not} 34. Rxa4 Rxa4 35. Kxa4 Bxh2 $16) 34... Be5 35. Rxa4 Rb8+ 36. Kc4 Rc8+ 37. Kd5 $1 Bxc3 {KRB-KR} 38. Ra7+ ({Don't take} 38. bxc3 $6 Rxc3 39. Ra7+ Ke8) 38... Ke8 39. bxc3 Rxc3 40. Rxg7 Rxa3 {KR-KR} 41. Ke6 $1 {[%csl Bf5,Bf6][%CAl Rg7g8]} Ra6+ 42. Kxf5 Ra2 $2 (42... Kf8 43. Rh7 Ra2) 43. Kxf6 Rxf2+ 44. Ke6 (44. Ke5 $142 h4 45. Ke6 Re2+ 46. Kf5) 44... Re2+ 45. Kf5 $1 Rf2+ 46. Ke4 $2 (46. Ke5 $18 {and the rest is easy.} h4 47. Ke6 Re2+ 48. Kf5) 46... Kf8 $16 47. Rg5 (47. Rg3 $1 $16 {[%CAl Rg3f3]} Rb2 48. Kf5) 47... Ke7 $11 48. h4 {Strongly threatening g3.} Kf6 49. g3 Re2+ $1 50. Kd4 (50. Kf3 {looks sharper.} Re5 51. Rg8 Rf5+ 52. Ke4 Re5+ 53. Kf4 ) 50... Re1 $2 {[%mdl 8192] This costs Black the game.} (50... Re7 $11) 51. Rxh5 {White mates.} Rg1 {[#]} 52. Rg5 $1 Re1 53. g4 Rh1 54. Rf5+ Kg6 55. h5+ Kh6 56. Ke3 Re1+ 57. Kf2 Ra1 58. Kg3 Rg1+ 59. Kh3 Rh1+ {[#]} 60. Kg2 $1 Ra1 61. Rf6+ Kg7 62. Rg6+ Kf7 63. Kg3 Ra4 64. Rg5 Ra1 65. Rf5+ Kg7 66. Kh4 Ra6 67. Kg5 Rb6 68. Rc5 Ra6 69. Rc7+ Kg8 70. h6 Ra5+ 71. Kg6 {[%CAl Rc7c8]} Ra6+ 72. Kh5 Kh8 73. g5 Ra8 74. Rc5 Rb8 75. g6 Ra8 76. Rf5 Rb8 77. h7 Kg7 78. Rf7+ Kh8 79. Kh6 {[%csl Gf7,Gh6][%CAl Rg6g7] Weighted Error Value: White=0.21/Black=0.20} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.23"] [Round "7.5"] [White "Checa, Nicolas"] [Black "Li, Ben"] [Result "1/2-1/2"] [ECO "D38"] [WhiteElo "2552"] [BlackElo "2376"] [Annotator "TA"] [PlyCount "150"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 25,150,13,15,9,20,12,13,7,10,0,0,0,0,0,12,12,15,0,0,0,37,0,50,25,50,7, 53,53,58,51,45,55,8,8,8,12,9,0,0,0,0,0,8,8,8,8,8,8,70,66,78,70,93,93,93,77,93, 68,71,71,71,71,93,85,75,76,79,71,71,71,129,79,82,71,93,93,93,93,93,93,93,93,93, 93,93,93,93,93,93,93,93,8,93,93,93,93,93,93,93,93,93,93,93,93,93,8,93,93,93,27, 25,25,93,93,93,8,8,8,8,0,8,0,8,8,8,8,8]} 1. d4 d5 2. c4 e6 3. Nc3 Bb4 4. cxd5 exd5 5. Nf3 Nf6 6. Bg5 Nbd7 7. e3 c5 8. Bd3 Qa5 9. Qc2 c4 10. Bf5 O-O 11. O-O Re8 12. Nd2 g6 13. Bh3 Kg7 14. a3 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} Bxc3 15. Qxc3 Qxc3 16. bxc3 h6 17. Bxf6+ Nxf6 18. Bxc8 Raxc8 19. Rfb1 {[#]} Rc7 $146 ({Predecessor:} 19... Re7 20. Rb5 Rc6 21. a4 a6 22. Rb4 Ne8 23. Rab1 Nd6 24. Kf1 Kf8 25. Ke2 Ke8 {1/2-1/2 (46) Hernandez Carmenates,H (2564)-Peralta,F (2603) Salou 2011}) 20. a4 Re6 21. Rb4 b6 22. Kf1 g5 23. Ke2 h5 24. h4 g4 25. f3 Rce7 26. Nf1 Ne8 27. a5 Nd6 28. axb6 axb6 29. Rxb6 {With the idea Ng3.} Nf5 30. Rxe6 fxe6 31. fxg4 hxg4 $11 {[%mdl 4096] Endgame KRN-KRN} 32. e4 dxe4 33. Ne3 Nxh4 34. Ra5 Rb7 35. Rg5+ Kf6 36. Rxg4 { [%mdl 64] [#] Double Attack} Rb2+ (36... Nf5 $11 37. Nxc4 Ra7) 37. Kd1 $14 Nf5 38. Nxc4 Rf2 39. Rxe4 {Black must now prevent g4.} Rxg2 40. Re2 Rg4 41. Ne5 Rg3 42. Kd2 Ke7 43. Nc4 Rg4 44. Kd3 Rg3+ 45. Kc2 Kd7 46. Re4 Rh3 47. Kb3 Nd6 (47... Kc7 $142) 48. Ne5+ Kc7 49. Rf4 Nb5 50. Rf7+ Kb6 51. Rf3 Rxf3 52. Nxf3 $16 { Strongly threatening Ng5. KN-KN} Kc6 53. Kc4 Nd6+ 54. Kd3 Kd5 55. Ne5 Nf5 56. Ng6 Kd6 57. c4 {[%CAl Bc3c4,Bc4c5][%mdl 32]} Kc6 58. Nf4 (58. Ne5+ $16 Kd6 59. Ke4 Ng3+ 60. Ke3) 58... Kd6 (58... Nxd4 $1 $11 {keeps the balance.} 59. Kc3 ( 59. Kxd4 e5+ 60. Kxe5 Kc5 $11) 59... e5) 59. c5+ Kd7 60. Ke4 Ne7 61. Nd3 Kc7 62. Ne5 Kd8 63. Nf7+ Ke8 64. Ng5 Kd7 65. Nf3 ({White should try} 65. Nh7 $16 { Hoping for Nf8+.} Ng6 66. Ng5) 65... Kc7 (65... Kc6 $11) 66. Ke5 Kd7 67. Kf6 ( 67. Nd2 $16) 67... Nd5+ $11 68. Kf7 {Threatens to win with Ne5+.} Nf4 {[#]} 69. Ne5+ $1 Kc7 70. Ke7 (70. Kf6 $16 {Ng6 is the strong threat.} Ne2 71. Nf3 (71. Kxe6 Nxd4+ 72. Kf7 Nb3 $11)) 70... Ne2 {The position is equal.} 71. Nf3 Kc6 72. Ne5+ Kc7 73. Nf3 Kc6 74. Kxe6 {aiming for Ke5.} (74. Kf6 $5 {[%CAl Rf6e5]} Nxd4 {[%mdl 64] Remove Defender} 75. Nxd4+ Kxc5 76. Nxe6+ $11) 74... Nxd4+ $1 { [%mdl 64] Remove Defender} 75. Nxd4+ Kxc5 {Weighted Error Value: White=0.10/ Black=0.12} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.24"] [Round "8.1"] [White "Li, Ben"] [Black "Hong, Andrew"] [Result "0-1"] [ECO "D24"] [WhiteElo "2376"] [BlackElo "2474"] [Annotator "TA"] [PlyCount "176"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,176,10,10,10,0,2,0,0,0,0,0,0,-37,-16,-39,-35,-46,-44,-83,-89,-83,-82, -97,-89,-87,-91,-102,-22,-59,-28,-27,-20,-102,-98,-125,-91,-389,-383,-381,-391, -495,-305,-285,-269,-262,-254,-253,-115,-300,0,-231,-231,-227,-235,-255,-200, -197,-199,-460,-391,-380,-242,-264,-104,-102,-94,-100,-104,-213,-213,-173,-58, -234,-232,-593,-572,-693,-693,-642,-279,-277,-272,-356,-81,-350,-343,-973,-918, -3910,-2038,-1567,-728,-790,-3690,-3856,-3729,-1984,-2706,-2085,-1868,-4672, -4723,-3667,-3379,-2675,-1939,-2334,-2298,-1970,-1649,-29967,-29960,-29970, -29971,-29966,-29969,-29974,-29975,-29974,-29975,-29975,-29976,-29971,-29976, -29977,-29978,-29978,-29979,-29979,-29980,-29982,-29983,-29983,-29984,-29984, -29985,-29985,-29986,-29987,-29986,-29986,-29984,-29984,-29985,-29985,-29986, -29986,-29987,-29987,-29988,-29988,-29989,-29990,-29991,-29991,-29989,-29990, -29991,-29993,-29994,-29997,-29997,-29998,-29999]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. Nc3 a6 5. e4 b5 6. e5 Nd5 7. a4 e6 8. axb5 Bb4 {was the old line (8... Nb6). D24: Queen's Gambit Accepted: 3 Nf3 Nf6 4 Nc3.} 9. Qc2 ({Of course not} 9. Bxc4 Nxc3 10. bxc3 Bxc3+ 11. Bd2 Bxa1 $17) 9... Nb6 10. Qe4 Qd5 {The position is equal.} 11. Qg4 axb5 {[%mdl 64] Discovered Attack} 12. Rxa8 Qxa8 13. Be2 Kf8 14. O-O Bxc3 15. bxc3 h6 16. Qh4 {[%CAl Rh4d8]} Nc6 17. Ng5 Ne7 18. Bf3 Nbd5 $1 {[#]} 19. Ne4 $146 ({Predecessor:} 19. Qh5 Ng6 20. Nxf7 Kxf7 21. Be4 Ndf4 22. Qf3 Qa5 23. Bxf4 Nxf4 24. Qxf4+ Ke7 25. Qg3 {1-0 (35) Najer,E (2599)-Torbin,K (2323) Togliatti 2001}) 19... Bb7 20. Qg4 Kg8 ({Black should play} 20... Bc6 $17) 21. h4 Nf5 {White must now prevent ...h5.} 22. h5 $1 Bc6 23. Re1 (23. Nf6+ $1 $11 Nxf6 24. Bxc6 Qxc6 25. exf6) 23... Kh7 $17 24. Nc5 { With the idea Nxe6!} Nde7 {Strongly threatening ...Bxf3.} 25. Bd1 $2 (25. Bxc6 $17 Qxc6 26. Qf4) 25... Qa1 $1 $19 {[%csl Bc1,Bc3]} 26. Bd2 Qb2 27. Qe2 b4 { [%mdl 64] Deflection} 28. cxb4 Nxd4 29. Qe3 Nd5 {[%mdl 64] Double Attack} 30. Qe4+ Nf5 (30... Kg8 $19 31. Be3 Nxe3 32. Qxe3 Qxb4) 31. Bg4 $2 Nde3 $2 32. Bxf5+ $2 (32. Qxc6 $11 Nxg4 33. Ne4) 32... Nxf5 33. Qxc6 Qxd2 34. Ra1 Qc3 ({ Don't play} 34... Qxb4 35. Ne4 $17) 35. Rd1 Qxe5 36. Na6 $2 (36. Qe4 Qxe4 37. Nxe4) 36... c3 37. Qc4 Nd6 38. Qd3+ Qf5 $2 (38... f5 $1 $19 {and Black stays clearly on top. Hoping for ...Ra8.} 39. Nc5 Ra8) 39. Qxc3 $17 Qxh5 40. Qd3+ Nf5 41. Nxc7 (41. b5 $17) 41... Rc8 $1 $19 {[%CAl Rc8c7]} 42. Nb5 {[#]} Qg4 (42... Rc4 $3 $19 {[%mdl 512] Threatens to win with ...Rh4.} 43. Qxc4 Qxd1+ 44. Qf1 Qb3) 43. Rb1 $2 {[#]} ({White must play} 43. Nd6 $15 Rb8 44. Nxf7) 43... Rc4 $1 44. Qb3 $2 (44. f3 {is a better chance.} Qf4 45. Nc3 Rxb4 46. Rxb4 Qxb4 47. Kf1 ) 44... Nh4 {[%csl Gh4][%CAl Rg4g2]} 45. Qd3+ f5 {[%csl Gh4][%CAl Rg4g2]} 46. Qg3 {intending Qxg4.} Rxb4 (46... Qe2 $142 47. Qe3 Qa2) 47. Rxb4 Qxb4 48. Nc7 Qe1+ 49. Kh2 Ng6 50. Qd6 $2 (50. Qe3 Qxe3 51. fxe3) 50... Qxf2 {( -> ...Nf4)} 51. Nxe6 Qh4+ 52. Kg1 Qe1+ 53. Kh2 Qe5+ (53... Ne5 $142 54. Qe7 Ng4+ 55. Kh3 Qe5 56. Nf8+ Kg8 57. Qxe5 Nxe5) 54. Qxe5 Nxe5 {[%mdl 4096] Endgame KN-KN} 55. Kg3 g5 56. Kf2 Kg6 57. g3 Kf6 58. Nc5 Ke7 59. Nb3 Nc6 60. Nd2 Ke6 61. Nc4 Ne5 62. Nb6 h5 {Black mates.} 63. Kg2 Ng6 64. Kf3 h4 65. gxh4 Nxh4+ 66. Kg3 Ng6 67. Kf3 Ne5+ 68. Ke3 Nd7 69. Nc4 Kd5 70. Nd2 f4+ 71. Kf2 g4 72. Nf1 Ne5 73. Nd2 Nc4 74. Nb3 Nd6 75. Ke2 Ne4 76. Nc1 Nc5 77. Kf2 Ke4 78. Ne2 Nd3+ 79. Kf1 g3 80. Nc3+ Kf5 81. Kg2 Kg4 82. Nd1 f3+ 83. Kg1 Kf4 84. Kf1 Ne5 85. Kg1 Ng4 86. Kh1 Nf2+ 87. Nxf2 gxf2 88. Kh2 f1=R {Weighted Error Value: White=0.80/Black=0.36} 0-1 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.24"] [Round "8.2"] [White "Wang, Justin"] [Black "Checa, Nicolas"] [Result "1/2-1/2"] [ECO "D11"] [WhiteElo "2467"] [BlackElo "2552"] [Annotator "TA"] [PlyCount "93"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,93,14,17,19,16,13,24,13,2,14,0,0,-14,-14,-5,-14,-30,18,17,13,0,10,0, 9,12,35,-36,-44,-65,-67,-68,-64,-66,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 5. Qb3 Qb6 6. Ne5 Bf5 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} 7. cxd5 Qxb3 8. axb3 Nxd5 {White has an edge.} 9. Bd2 Nd7 {[#]} 10. Bd3 $146 ({Predecessor:} 10. Nxd7 Kxd7 11. Na3 e6 12. f3 Nb6 13. Nc4 Nxc4 14. bxc4 Bg6 15. Bc3 a6 16. Be2 {1/2-1/2 (52) Akesson,R (2456) -Livner,A (2334) Sweden 2014}) 10... e6 11. Bxf5 exf5 12. Nd3 Bd6 13. Na3 { [%CAl Bb1a3,Ba3c4,Bc4a5][%mdl 32]} O-O 14. Nc4 Be7 15. Na5 Rab8 16. b4 Rfe8 17. g3 N7f6 18. Ke2 (18. Nc5 $14) 18... Ne4 $15 19. Be1 Nd6 20. Kf3 Bd8 21. Bc3 Bxa5 ({Better is} 21... Bg5 $15 22. Kg2 Bh6) 22. bxa5 $11 {The position is equal.} Ne4 23. Ra3 b6 24. Rc1 (24. axb6 {is interesting.} axb6 25. Nb4 Nxb4 26. Bxb4 c5 27. dxc5 bxc5 28. Bc3) 24... c5 25. axb6 axb6 26. dxc5 Ndxc3 27. bxc3 bxc5 28. c4 Ra8 29. Rxa8 (29. Rca1 {keeps more tension.} Nd2+ 30. Ke2 Rxa3 31. Rxa3 Nxc4 32. Rc3) 29... Rxa8 {[%mdl 4096] Endgame KRN-KRN} 30. Rc2 Ra3 31. Ke2 Nc3+ 32. Kd2 Ne4+ 33. Ke2 g6 34. f3 Nc3+ 35. Kd2 Nb1+ 36. Ke2 Nc3+ 37. Kd2 Na4 38. Nc1 Kg7 39. Ra2 Nb6 40. Rxa3 Nxc4+ {[%mdl 64] [#] Double Attack} 41. Kc3 Nxa3 {KN-KN} 42. Kb3 Nb1 {aiming for ...Nd2+.} 43. Kc2 Na3+ 44. Kb3 Nb5 ( 44... Nb1 $5 45. Kc2 $8 Na3+ 46. Kb3 $11) 45. Kc4 Nc7 46. Nd3 Ne6 47. f4 { Weighted Error Value: White=0.06/Black=0.04} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.24"] [Round "8.3"] [White "Balakrishnan, Praveen"] [Black "Burke, John M"] [Result "1-0"] [ECO "E04"] [WhiteElo "2507"] [BlackElo "2538"] [Annotator "ChessBase"] [PlyCount "205"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] [TimeControl "40/5400+30:1800+30"] 1. d4 {[%emt 0:00:03]} d5 {[%emt 0:00:08]} 2. c4 {[%emt 0:00:09]} e6 {[%emt 0: 00:06]} 3. Nf3 {[%emt 0:00:06]} Nf6 {[%emt 0:00:05]} 4. g3 {[%emt 0:00:06]} dxc4 {[%emt 0:00:32]} 5. Bg2 {[%emt 0:00:21]} a6 {[%emt 0:00:57]} 6. O-O { [%emt 0:00:53]} Nc6 {[%emt 0:00:32]} 7. e3 {[%emt 0:00:28]} Bd7 {[%emt 0:01:40] } 8. Qe2 {[%emt 0:01:41]} b5 {[%emt 0:00:30]} 9. b3 {[%emt 0:01:59]} cxb3 { [%emt 0:00:21]} 10. axb3 {[%emt 0:00:07]} Bd6 {[%emt 0:03:17]} 11. Bb2 { [%emt 0:02:59]} O-O {[%emt 0:00:08]} 12. Rc1 {[%emt 0:09:41]} Nb4 {[%emt 0:06: 47]} 13. Ne5 {[%emt 0:11:42]} Ra7 {[%emt 0:00:08]} 14. Ba3 {[%emt 0:15:59]} Be8 {[%emt 0:21:31]} 15. Bxb4 {[%emt 0:14:10]} Bxb4 {[%emt 0:00:07]} 16. Nc6 { [%emt 0:03:09]} Bxc6 {[%emt 0:00:05]} 17. Rxc6 {[%emt 0:00:30]} e5 {[%emt 0:06: 14]} 18. dxe5 {[%emt 0:06:30]} Nd7 {[%emt 0:00:05]} 19. Rcxa6 {[%emt 0:06:10]} Rxa6 {[%emt 0:00:04]} 20. Rxa6 {[%emt 0:00:07]} Nxe5 {[%emt 0:05:39]} 21. Na3 { [%emt 0:04:03]} Bxa3 {[%emt 0:11:27]} 22. Rxa3 {[%emt 0:00:13]} Qd6 {[%emt 0: 01:22]} 23. Ra5 {[%emt 0:04:38]} c6 {[%emt 0:00:16]} 24. Ra1 {[%emt 0:01:34]} Rd8 {[%emt 0:03:47]} 25. Rc1 {[%emt 0:04:19]} Qb4 {[%emt 0:05:16]} 26. Rd1 { [%emt 0:01:58]} Rc8 {[%emt 0:06:28]} 27. Qc2 {[%emt 0:01:27]} g6 {[%emt 0:10: 29]} 28. Bh3 {[%emt 0:02:25]} f5 {[%emt 0:01:39]} 29. Bg2 {[%emt 0:01:16]} Qe7 {[%emt 0:03:17]} 30. h3 {[%emt 0:03:02]} c5 {[%emt 0:00:51]} 31. Bd5+ {[%emt 0: 01:02]} Kg7 {[%emt 0:03:22]} 32. Qc3 {[%emt 0:00:50]} Qf6 {[%emt 0:01:03]} 33. Kg2 {[%emt 0:00:34]} c4 {[%emt 0:00:45]} 34. bxc4 {[%emt 0:01:43]} Nxc4 { [%emt 0:01:44]} 35. Qb4 {[%emt 0:00:18]} Nd6 {[%emt 0:02:25]} 36. Bf3 {[%emt 0: 00:33]} Rd8 {[%emt 0:00:15]} 37. Rd5 {[%emt 0:00:57]} Rd7 {[%emt 0:01:26]} 38. Be2 {[%emt 0:00:41]} Rd8 {[%emt 0:02:00]} 39. Bxb5 {[%emt 0:00:28]} Nxb5 { [%emt 0:00:05]} 40. Qxb5 {[%emt 0:00:00]} Rxd5 {[%emt 0:00:00]} 41. Qxd5 { [%emt 0:01:03]} Kh6 {[%emt 0:02:46]} 42. Qc4 {[%emt 0:01:38]} Qf8 {[%emt 0:04: 26]} 43. Qh4+ {[%emt 0:04:56]} Kg7 {[%emt 0:00:04]} 44. Qd4+ {[%emt 0:00:06]} Kh6 {[%emt 0:00:45]} 45. Qf4+ {[%emt 0:02:38]} Kg7 {[%emt 0:00:43]} 46. g4 { [%emt 0:02:48]} Qa8+ {[%emt 0:00:37]} 47. Kg3 {[%emt 0:04:22]} fxg4 {[%emt 0: 05:10]} 48. hxg4 {[%emt 0:01:22]} Qh1 {[%emt 0:01:01]} 49. Qd4+ {[%emt 0:02:47] } Kg8 {[%emt 0:02:31]} 50. Qd8+ {[%emt 0:00:45]} Kf7 {[%emt 0:02:21]} 51. Qh4 { [%emt 0:00:33]} Qg1+ {[%emt 0:00:08]} 52. Kf3 {[%emt 0:00:59]} h6 {[%emt 0:02: 54]} 53. Qd8 {[%emt 0:08:25]} h5 {[%emt 0:02:24]} 54. Qd5+ {[%emt 0:00:38]} Kf6 {[%emt 0:05:30]} 55. Qd6+ {[%emt 0:03:05]} Kf7 {[%emt 0:00:59]} 56. Qf4+ { [%emt 0:00:24]} Ke6 {[%emt 0:01:31]} 57. Qe4+ {[%emt 0:02:10]} Kf6 {[%emt 0:00: 22]} 58. Qd4+ {[%emt 0:00:15]} Ke6 {[%emt 0:00:37]} 59. Qb6+ {[%emt 0:00:13]} Kf7 {[%emt 0:00:18]} 60. Qc7+ {[%emt 0:00:15]} Ke6 {[%emt 0:01:31]} 61. Qc6+ { [%emt 0:00:07]} Kf7 {[%emt 0:00:15]} 62. Qd5+ {[%emt 0:00:18]} Kf6 {[%emt 0:00: 05]} 63. g5+ {[%emt 0:02:34]} Ke7 {[%emt 0:00:30]} 64. Qe4+ {[%emt 0:00:31]} Kf7 {[%emt 0:00:32]} 65. Qf4+ {[%emt 0:00:20]} Ke8 {[%emt 0:01:15]} 66. Ke2 { [%emt 0:00:26]} Qb1 {[%emt 0:01:04]} 67. e4 {[%emt 0:00:30]} Qc2+ {[%emt 0:03: 11]} 68. Kf3 {[%emt 0:00:16]} Qd1+ {[%emt 0:01:07]} 69. Kg2 {[%emt 0:00:22]} Ke7 {[%emt 0:00:38]} 70. Qf3 {[%emt 0:00:56]} Qd4 {[%emt 0:00:21]} 71. Qa3+ { [%emt 0:00:20]} Kf7 {[%emt 0:00:24]} 72. Qb3+ {[%emt 0:00:11]} Ke7 {[%emt 0:01: 11]} 73. Qb7+ {[%emt 0:00:10]} Ke6 {[%emt 0:01:04]} 74. Qc6+ {[%emt 0:00:22]} Kf7 {[%emt 0:00:04]} 75. Qc7+ {[%emt 0:01:21]} Ke6 {[%emt 0:00:04]} 76. Qc6+ { [%emt 0:00:37]} Kf7 {[%emt 0:00:04]} 77. Qc7+ {[%emt 0:00:44]} Ke6 {[%emt 0:00: 05]} 78. Qf4 {[%emt 0:00:17]} Ke7 {[%emt 0:00:04]} 79. Qf3 {[%emt 0:00:33]} Ke6 {[%emt 0:00:30]} 80. Kh3 {[%emt 0:00:44]} Qa1 {[%emt 0:02:34]} 81. Kh4 { [%emt 0:00:35]} Qg1 {[%emt 0:00:44]} 82. Qg3 {[%emt 0:00:26]} Qb1 {[%emt 0:00: 52]} 83. Qe3 {[%emt 0:00:25]} Qg1 {[%emt 0:00:29]} 84. Qg3 {[%emt 0:00:32]} Qb1 {[%emt 0:00:07]} 85. f3 {[%emt 0:00:33]} Kd7 {[%emt 0:00:51]} 86. Qf2 {[%emt 0: 00:28]} Qa1 {[%emt 0:00:41]} 87. Kh3 {[%emt 0:00:27]} Qc1 {[%emt 0:00:45]} 88. Qd4+ {[%emt 0:00:17]} Ke8 {[%emt 0:00:56]} 89. Qe5+ {[%emt 0:00:20]} Kd7 { [%emt 0:00:22]} 90. Qg7+ {[%emt 0:00:07]} Kd8 {[%emt 0:00:29]} 91. Qxg6 { [%emt 0:00:33]} Qh1+ {[%emt 0:00:05]} 92. Kg3 {[%emt 0:00:03]} Qg1+ {[%emt 0: 00:54]} 93. Kf4 {[%emt 0:00:05]} Qh2+ {[%emt 0:00:02]} 94. Kf5 {[%emt 0:00:36]} Qh3+ {[%emt 0:00:04]} 95. Ke5 {[%emt 0:00:22]} h4 {[%emt 0:00:47]} 96. Qf6+ { [%emt 0:01:06]} Ke8 {[%emt 0:00:53]} 97. g6 {[%emt 0:00:56]} Qh2+ {[%emt 0:00: 42]} 98. Kf5 {[%emt 0:00:14]} Qg3 {[%emt 0:00:26]} 99. f4 {[%emt 0:00:53]} Qh3+ {[%emt 0:00:46]} 100. Kg5 {[%emt 0:00:09]} Qg3+ {[%emt 0:00:31]} 101. Kh6 { [%emt 0:00:29]} h3 {[%emt 0:00:04]} 102. g7 {[%emt 0:00:17]} h2 {[%emt 0:00:02] } 103. Qe6+ {[%emt 0:00:04]} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.24"] [Round "8.4"] [White "Yoo, Christopher Woojin"] [Black "Niemann, Hans Moke"] [Result "1-0"] [ECO "D90"] [WhiteElo "2479"] [BlackElo "2571"] [Annotator "TA"] [PlyCount "107"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,107,-12,18,15,13,0,8,24,12,2,34,16,38,41,57,63,71,75,56,67,63,12,28,0, 0,0,0,0,0,0,0,0,14,14,14,11,10,16,12,9,6,9,11,0,11,11,4,10,28,28,28,22,18,23, 27,2,33,27,71,25,27,28,44,48,31,55,126,153,210,95,144,150,144,144,206,196,366, 361,331,329,420,420,549,549,304,301,29961,29962,29963,29964,29963,29964,29965, 29966,29965,29965,29964,29966,29977,29978]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. h4 c6 6. cxd5 {D90: Grünfeld: 4 Nf3 Bg7 sidelines.} cxd5 7. Bf4 O-O 8. e3 {The position is equal.} Nc6 9. Be2 Bf5 10. Qb3 Qd7 11. Rd1 {[#]} Na5 $146 ( {Predecessor:} 11... Rfc8 12. Ne5 Qd8 13. g4 Be6 14. f3 Na5 15. Qb4 h5 16. Rg1 Bf8 17. Kf2 hxg4 18. fxg4 {1-0 (49) Biedermann,K (2182)-Gauna,J (2181) ICCF email 2013}) 12. Qa3 Nc4 13. Bxc4 dxc4 14. Ne5 Qd8 15. Qb4 (15. Nxc4 $14 Nd5 16. O-O) 15... Nd5 $1 $11 {[%CAl Rd5b4]} 16. Qxb7 Nxf4 17. exf4 Rb8 18. Qxa7 Rxb2 19. O-O e6 20. g3 Qa8 21. Qxa8 Rxa8 22. Nxc4 Rc2 23. Rc1 $1 Bxd4 24. Rxc2 Bxc2 {[#]} 25. Rc1 $1 Bd3 26. Rd1 Bxf2+ 27. Kxf2 Bxc4 {[%mdl 4096] Endgame KRB-KRN} 28. a4 Bb3 29. Ra1 Rc8 30. Ne4 Kg7 31. Ra3 Bd5 32. Nd2 Kf6 33. a5 Rc2 34. Ke3 Kf5 $1 35. a6 Kg4 36. Ne4 {aiming for Nf6+.} Ba8 37. Kd4 {Ng5 is the strong threat.} Re2 (37... h6 $14 38. a7 Rg2 39. Nf6+ Kh3) 38. Nf6+ Kf5 39. Ne8 (39. Nxh7 $18 {is the precise move to win.} f6 40. Ra1) 39... Rc2 {[#]} 40. Nd6+ $1 Kf6 {Threatening ...Rd2+.} 41. Nc4 h5 (41... Rc1 $16 {was worth a try.} 42. Nb6 Bh1) 42. a7 Rg2 $2 (42... Rc1 43. Nb6 Bc6) 43. Nb6 $18 Bb7 44. Rb3 { Hoping for Nd7+.} Rd2+ 45. Ke3 Rd8 46. Nc4 Bh1 47. Rb8 Ke7 (47... Rd7 $18) 48. Rxd8 {White mates.} Kxd8 {KB-KN} 49. Nb6 Kc7 50. a8=Q Bxa8 51. Nxa8+ Kc6 52. Ke4 f6 53. Kd4 Kb7 {[#]} 54. Kc5 $1 {[%emt 0:00:34] Weighted Error Value: White=0.08/Black=0.} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.24"] [Round "8.5"] [White "Jacobson, Brandon"] [Black "Brodsky, David"] [Result "1/2-1/2"] [ECO "D30"] [WhiteElo "2504"] [BlackElo "2455"] [Annotator "TA"] [PlyCount "83"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 9,83,23,27,23,75,64,70,62,84,93,98,83,99,90,84,72,64,70,69,63,115,99,99, 109,131,105,105,96,143,156,152,160,159,147,135,122,131,110,142,154,198,135,127, 134,133,127,132,125,122,70,74,74,74,74,74,74,74,77,69,61,73,30,30,30,30,30,37, 33,33,33,51,0,33,0,52,0]} 1. d4 d5 2. c4 e6 3. Nf3 a6 4. Nbd2 {[%CAl Bb1d2, Bd2c4,Bc4e5][%mdl 32]} dxc4 5. Nxc4 b5 6. Nce5 {D30: Queen's Gambit Declined: Systems without Nc3.} Nf6 (6... Bb7 $11 {keeps the balance.}) 7. g3 $16 Bb7 8. Bg2 $1 {aiming for Nxf7!} Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 {Threatens to win with Nxf7!} O-O {[#]} 11. O-O $146 ({Predecessor:} 11. Rc1 Qd6 12. O-O Bd5 13. Qc2 Ra7 14. a3 h6 15. Rfd1 a5 16. Ne1 Bxg2 17. Nxg2 {0-1 (51) Kurajica,B (2554) -Drazic,S (2493) El Sauzal 2007}) 11... Nbd7 12. Nxd7 Nxd7 13. Rfc1 Rc8 14. Qb4 Re8 (14... Bd5 $14) 15. a4 e5 16. axb5 axb5 17. Ra7 (17. Qxb5 $6 Bxf3 18. Bxf3 exd4 $14) 17... Bxf3 18. Bxf3 e4 19. Bg2 e3 {[#]} 20. f4 (20. Qxb5 $6 exf2+ 21. Kf1 Nf6 $11) 20... Nf6 21. Bf3 ({Don't do} 21. Qxb5 $6 Qxd4 22. Rb7 (22. Rcxc7 $2 Qd1+ 23. Bf1 Qe1 $19) (22. Raxc7 $2 Rxc7 23. Rb1 Rcc8 $19) 22... Qd2 $14) 21... Qd7 22. Qc5 {Strongly threatening Bc6.} Ne4 23. Qc6 Qxc6 24. Rxc6 f5 25. Rcxc7 ({Don't play} 25. Raxc7 $6 Rxc7 26. Rxc7 Rd8 $16) (25. Rb7 $18) 25... Rxc7 26. Rxc7 $18 {[%mdl 4096] Endgame KRB-KRN} Rd8 27. Rb7 Rd5 28. Kg2 g6 29. g4 (29. b3 $16) 29... Rxd4 $14 30. Rxb5 Nd2 31. gxf5 Rxf4 32. fxg6 hxg6 {[#]} 33. Kg3 $1 {[%CAl Rg3f4]} Rf6 34. Bd5+ Kf8 35. Rb8+ Ke7 36. Rb7+ Kd6 37. Bf3 { Hoping for Rb6+.} Kc5 38. Rc7+ Kd4 $1 39. Rd7+ Kc4 40. Rc7+ Kd4 $1 41. Rd7+ ( 41. Rc6 $5 {[%CAl Rc6f6]} Rf8 42. Rd6+ (42. Rxg6 Nxf3 43. Rg4+ Kd5 $11) 42... Kc5 43. Re6 $11) 41... Kc4 42. Rc7+ {Blacks defense is rewarded with a draw. Weighted Error Value: White=0.11/Black=0.08} (42. b3+ $14 Kxb3 43. Bg2) 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.25"] [Round "9.1"] [White "Burke, John M"] [Black "Li, Ben"] [Result "1-0"] [ECO "C90"] [WhiteElo "2538"] [BlackElo "2376"] [Annotator "TA"] [PlyCount "101"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 16,101,22,21,36,11,36,34,38,31,43,37,51,21,28,26,36,13,20,7,9,6,47,48, 33,34,45,37,39,51,50,55,79,73,99,64,76,68,85,66,127,130,235,249,276,263,271, 267,313,247,272,277,350,373,425,424,403,397,604,600,606,626,736,568,1869,1889, 5106,3692,2541,2639,29980,29975,29984,29985,29984,29975,29975,29976,29976, 29977,29976,29977,29977,29978,29983,29984,29984,29985]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. a4 Bg4 9. c3 b4 {C90: Closed Ruy Lopez with 7...d6: Early deviations.} 10. a5 bxc3 11. Ba4 Bd7 { [#] White is slightly better.} 12. dxc3 $146 ({Predecessor:} 12. bxc3 O-O 13. d3 Nb8 14. d4 exd4 15. cxd4 d5 16. e5 Ne4 17. Bb3 Bf5 18. Ba3 Bxa3 19. Nxa3 { 0-1 (33) Asplund,S-Svensson,O Sweden 1979}) 12... O-O 13. b4 Qc8 14. Nbd2 Nd8 15. Bc2 Ne6 16. Nc4 Re8 17. Ne3 g6 18. Rb1 Qb7 19. Nd5 Nxd5 20. exd5 Ng7 21. c4 f5 22. Ba4 Bxa4 23. Qxa4 Bf6 24. Bh6 {Black is now going downhill.} Re7 25. Bg5 Bxg5 26. Nxg5 e4 27. Qb3 h6 {[#]} (27... Qa7 $14) 28. Nf3 $1 $16 {[%mdl 576] Pin} Rf8 (28... Nh5 $16) (28... Qa7 29. c5) 29. Nd4 $18 Ree8 30. b5 axb5 31. cxb5 f4 32. b6 cxb6 33. axb6 f3 34. gxf3 exf3 35. Rxe8 Rxe8 36. Qxf3 Rf8 (36... Kh7 $142 37. Nc6 Ra8) 37. Qg3 Kh7 38. Qxd6 Rf7 39. Ne6 {Strongly threatening Nd8.} Nf5 40. Qc6 Qb8 41. b7 Nh4 42. d6 Qa7 {[#]} 43. Nf4 $1 {[%mdl 512] White mates.} Qd4 {[#]} (43... Qb8 44. Qc8) 44. b8=Q $1 Qxf4 {[#]} 45. Qbb7 $3 Nf3+ { [#]} 46. Qxf3 $3 Qxf3 47. Qxf3 Rxf3 48. Rb7+ Kg8 49. d7 Rf8 {[#]} 50. Rc7 $1 { [%CAl Rc7c8]} Rd8 51. Rc8 {Weighted Error Value: White=0.06/Black=0.41} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.25"] [Round "9.2"] [White "Hong, Andrew"] [Black "Wang, Justin"] [Result "1-0"] [ECO "C54"] [WhiteElo "2474"] [BlackElo "2467"] [Annotator "TA"] [PlyCount "115"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 14,115,18,6,11,11,4,8,4,4,14,-2,37,6,15,0,0,0,52,49,44,34,74,50,40,34, 62,41,48,27,31,30,42,27,45,23,47,47,44,47,52,72,79,59,49,61,203,133,186,141, 213,126,171,177,177,139,166,146,179,184,199,120,197,174,327,327,407,407,433, 424,435,425,428,406,492,481,484,476,491,477,481,483,488,481,678,677,731,725, 699,685,943,928,2136,2046,1989,2037,29986,29987,29987,29988,29992,29993,29994, 29995]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. O-O h6 7. Re1 O-O 8. h3 a5 {is recently more successful than 8...a6. C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 9. Nbd2 Be6 10. Bb5 Qb8 {The position is equal. } 11. Nf1 Qa7 12. d4 {[#]} Bb6 $146 {[%CAl Re5d4]} ({Predecessor:} 12... exd4 13. Bxc6 dxc3 14. Ba4 Bxf2+ 15. Kh2 Bxe1 16. Qxe1 d5 17. Be3 c5 18. e5 Ne4 19. bxc3 {0-1 (49) Alekseenko,K (2823)-Sevian,S (2989) Chess.com INT 2020}) 13. d5 {Be3 is the strong threat.} Bxf2+ 14. Kh2 Bxe1 15. Be3 {[%CAl Re3a7]} Qb8 ({ Black should play} 15... Bg3+ $11 16. Kxg3 Nxe4+ 17. Kh2 Qb8) 16. dxe6 $14 fxe6 17. Qxe1 Ne7 18. Bc4 {[%mdl 1024] White has strong compensation.} Qc8 (18... Nxe4 $6 19. Qh4 $16) 19. Rd1 Kh7 20. Bc1 Ng6 21. Ne3 Qe8 22. Ng4 b5 23. Bd3 Rb8 24. Bc2 Qe7 25. Qe3 {[%CAl Rg4h6]} Nxg4+ 26. hxg4 Rf7 27. g3 Kg8 28. Kg2 Rbf8 29. Rf1 Rf6 (29... c5 $14) 30. Bd3 c6 (30... Qe8 $16 {was worth a try.}) 31. Be2 Qe8 (31... d5 $16 {was called for.}) 32. Bd2 (32. Qd3 $18) 32... a4 33. Qd3 R6f7 34. Rh1 (34. Qxd6 Rd7 $17) 34... c5 {[#]} 35. g5 $1 (35. Qxd6 Rd7 $11) 35... h5 36. Be3 ({Don't take} 36. Qxd6 $6 Rd7 $16) (36. Rxh5 c4 $16) 36... c4 37. Qb1 ({Stronger than} 37. Qxd6 Qa8 $17) (37. Qd1 $18) 37... Rc7 {[#]} (37... Rd7 $16 {keeps fighting.}) 38. Qd1 $1 $18 Qc6 $2 (38... Rd7 39. Rxh5 a3) 39. Nd2 h4 40. Bh5 Ne7 41. Qg4 g6 {With the idea ...Nf5.} 42. Qxe6+ {[%mdl 64] Double Attack} Kg7 43. Bg4 b4 44. a3 bxc3 45. bxc3 Ng8 46. gxh4 {And now h5 would win.} ({Less strong is} 46. Rxh4 Re8 $18) 46... Re8 47. Qd5 Qxd5 48. exd5 Rb8 (48... Ne7 $142 49. Be6 Nf5) 49. Ne4 Ne7 50. Be6 Nf5 51. Bf2 Rb3 52. h5 Rxa3 53. Bxf5 gxf5 54. Nxd6 Rxc3 55. Ne8+ {White mates.} Kf8 56. Nxc7 e4 57. h6 f4 58. h7 {Weighted Error Value: White=0.09/Black=0.40} 1-0 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.25"] [Round "9.3"] [White "Brodsky, David"] [Black "Balakrishnan, Praveen"] [Result "1/2-1/2"] [ECO "C55"] [WhiteElo "2455"] [BlackElo "2507"] [Annotator "TA"] [PlyCount "103"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 10,103,37,30,25,33,40,31,36,15,20,-16,8,5,15,4,-2,0,-5,-13,28,-18,0,-11, -12,-40,-28,-18,-20,-20,-17,-18,-18,-41,-34,-66,-33,-151,-125,-131,-70,-75,-73, -66,-62,-83,-10,-11,25,38,23,23,70,22,29,29,29,31,15,18,28,0,0,-218,-208,-198, 69,0,8,7,8,8,8,8,8,8,8,0,8,8,8,8,8,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. O-O d6 6. c3 g5 $1 {[%mdl 4] is currently scoring better than 6...g6. C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} 7. a4 {[%CAl Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Bg7 8. a5 O-O {White is slightly better.} 9. a6 {[#]} b6 $146 ({Predecessor:} 9... d5 10. exd5 Nxd5 11. Re1 Nb6 12. Bb5 Qd5 13. c4 Qd6 14. Nc3 f5 15. Qb3 Kh7 {0-1 (32) Brodsky,D (2455)-Stearman,J (2361) chess.com INT 2021}) 10. Nbd2 Ne7 11. d4 Ng6 12. dxe5 dxe5 13. Qc2 g4 14. Ne1 c6 15. Nb3 Ne8 16. f3 Nd6 17. Be2 f5 18. fxg4 fxg4 19. Rxf8+ Qxf8 20. Be3 Be6 21. Rd1 Nc4 22. Bf2 Qf7 23. Nc1 ({White should play} 23. Nd2 $1 $15) 23... Rf8 24. Ned3 h5 (24... Nf4 $17 25. b3 Na5) 25. b3 $1 $15 { [%CAl Rb3c4]} Nd6 26. Be3 Nxe4 27. Nb4 $1 {[#]} Nc5 (27... Nf6 $1 $17 { Strongly threatening ...c5.} 28. Nxc6 Nd5) 28. Nxc6 $11 Bf5 ({Don't blunder} 28... Nxb3 $2 29. Nd8 $18) (28... Bxb3 $2 29. Nxb3 Nxb3 30. Nd8 $18) 29. Qa2 { Hoping for Bxc5.} Kh7 {White must now prevent ...Ne4.} 30. b4 $1 {[%CAl Rb4c5]} Ne6 31. Bc4 {Nd8! is the strong threat.} (31. Bd3 {feels hotter.} Qd7 32. b5 Bxd3 33. Rxd3 Qf7 34. Rd1) 31... Qc7 {[%CAl Rc7c6] [#]} 32. Nxa7 Qxa7 33. Bxe6 Bxe6 34. Qxe6 Qxa6 35. Qxb6 Qc4 36. Qc5 $2 (36. Bc5 $11 Ra8 37. Qd6) 36... Qe4 $19 {[%mdl 1024] Black has strong compensation.} 37. Bg5 h4 $2 (37... Qc2 $19 { [%CAl Rc2d1]} 38. Re1 Rf5) 38. Qd5 (38. Qe3 $1 $14 Qf5 39. Ne2) 38... Qf5 { ( -> ...Qf2+). The position is equal.} 39. Be3 $36 {[%mdl 2048] White has the initiative.} h3 40. Ne2 hxg2 41. Qxg2 Qc2 42. Rf1 Rxf1+ 43. Kxf1 Qb1+ 44. Nc1 Qf5+ 45. Qf2 Qe4 46. b5 Nf4 47. Bxf4 exf4 48. Qh4+ Bh6 {aiming for ...Qh1+.} 49. Qxg4 Qh1+ {[%mdl 64] Double Attack} 50. Qg1 Qf3+ 51. Qf2 Qh1+ 52. Qg1 { Weighted Error Value: White=0.20/Black=0.21} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.25"] [Round "9.4"] [White "Niemann, Hans Moke"] [Black "Jacobson, Brandon"] [Result "1/2-1/2"] [ECO "A20"] [WhiteElo "2571"] [BlackElo "2504"] [Annotator "TA"] [PlyCount "141"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 11,141,22,16,7,33,14,20,16,35,37,39,35,41,39,23,35,39,24,21,19,23,11,27, 29,35,41,29,47,108,93,100,100,115,108,98,104,95,18,50,56,50,10,9,8,8,8,8,8,9,6, 6,4,6,6,5,0,0,0,0,-7,-10,-72,0,0,29,0,50,18,95,40,55,8,12,30,12,19,29,22,24,31, 23,21,23,6,43,4,4,0,47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 28,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0]} 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nf3 Nc6 6. O-O Nb6 7. b3 {A20: English Opening: 1...e5.} Bd6 {White should prevent ...e4.} 8. Nc3 O-O 9. d4 {[#]} Re8 $146 ({Predecessor:} 9... Bb4 10. Bb2 exd4 11. Nb5 d3 12. Qxd3 Qxd3 13. exd3 Nd5 14. Ne5 Nce7 15. a3 Ba5 { 1/2-1/2 (45) Adams,M (2694)-Studer,N (2546) Caleta 2020}) 10. d5 Ne7 11. Bb2 Bg4 12. Qd3 c6 13. dxc6 Nxc6 14. Rfd1 Bf8 15. Qe4 Qc8 16. Rac1 $36 {[%mdl 2048] White has good play.} Bh3 17. Nb5 {Black must now prevent Bxh3.} Bxg2 18. Kxg2 f6 19. Nh4 a6 ({Better is} 19... Rd8 $14) 20. Nd6 $16 Bxd6 21. Rxd6 Qc7 22. Ba3 Rad8 23. Nf5 Nc8 24. Rdd1 (24. Rdxc6 $16 bxc6 25. Rxc6) 24... Qf7 25. h4 Kh8 26. Rd3 g6 27. Rxd8 Rxd8 28. Ne3 N8a7 29. h5 Nb5 30. Bc5 gxh5 31. Nf5 Qd5 32. Qxd5 Rxd5 33. a4 Nbd4 34. e4 Rd8 35. Bxd4 exd4 $11 {[%mdl 4096] Endgame KRN-KRN } 36. Kf3 (36. Rd1 $11) 36... Kg8 (36... d3 $17) 37. Ke2 Kf7 38. f4 Ke6 39. Rc4 a5 (39... d3+ $11 40. Kd2 Rd7) 40. Kd3 (40. Rc5 $16) 40... Rg8 $14 41. Rc1 (41. Rc5 $5 {[%CAl Rc5b5]}) 41... h4 $1 {[%CAl Rh4g3]} 42. gxh4 Rg4 43. Rf1 h5 44. Rf3 Kd7 45. Kc4 Kc7 46. Rf1 Kd7 47. Rf2 Kc7 48. Kd5 Kd7 49. Kc4 Kc7 50. Nxd4 Nxd4 51. Kxd4 {KR-KR} Kd6 52. Rd2 Rxh4 53. Ke3+ Ke7 54. Rd5 Rh3+ 55. Kd4 Rxb3 56. Rxh5 Rb4+ 57. Kd5 Kf7 58. f5 b5 59. Rh7+ Kg8 60. Ra7 bxa4 61. Rxa5 Kf7 62. Ra7+ Ke8 63. Ke6 {[#] Intending Ra8+ and mate.} Rb6+ 64. Kd5 Rb4 {The position is equal.} 65. Ra8+ (65. e5 {feels hotter.} Rb5+ 66. Ke6 Rb6+ 67. Kd5 Rb5+) 65... Kf7 66. Ra6 (66. Ra7+ {is more complex.}) 66... Kg7 67. Ra7+ Kf8 68. e5 Rb5+ 69. Ke6 {[#] Threatens to win with Ra8+.} Rb6+ 70. Kd5 {With the idea e6.} Rb5+ 71. Ke6 {Weighted Error Value: White=0.11/Black=0.09} 1/2-1/2 [Event "USA-ch Juniors 2021"] [Site "Saint Louis"] [Date "2021.07.25"] [Round "9.5"] [White "Checa, Nicolas"] [Black "Yoo, Christopher Woojin"] [Result "1-0"] [ECO "D85"] [WhiteElo "2552"] [BlackElo "2479"] [Annotator "TA"] [PlyCount "123"] [EventDate "2021.07.16"] [EventType "tourn"] [EventCountry "USA"] [SourceTitle "playchess.com"] [Source "ChessBase"] [SourceQuality "1"] {[%evp 12,123,48,13,24,0,-5,-6,34,9,14,18,25,10,21,12,35,41,35,21,55,58,54,48, 106,118,118,117,150,122,155,155,144,183,164,169,198,168,183,159,153,131,333, 353,360,368,367,368,435,436,436,425,426,421,419,416,527,470,575,553,639,517, 515,493,423,368,397,402,402,402,402,397,366,364,344,316,1089,1054,1184,1184, 2537,1319,5611,5608,29975,29976,29976,29976,29976,29977,29976,29977,29977, 29978,29979,29980,29980,29981,29981,29982,29982,29983,29985,29986,29986,29987, 29986,29987,29988,29989,29993,29994,29994,29995]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Qa4+ Qd7 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} 8. Qa3 $1 {[%mdl 4] now scores much better than the old 8.Qb3.} O-O 9. Nf3 {[#]} Re8 $146 {The position is equal.} ({Predecessor:} 9... b6 10. Bd3 c5 11. O-O Nc6 12. Bb5 cxd4 13. cxd4 a6 14. Be3 Bb7 15. Be2 e6 {1/2-1/2 (31) Nakamura,H (2799)-Grischuk,A (2780) Khanty-Mansiysk 2015}) 10. Be3 b6 11. Rd1 Bb7 12. Bd3 c5 13. O-O Qc7 14. d5 c4 15. Bc2 a6 16. Qb4 Nd7 17. Rb1 {[%CAl Re3b6]} a5 (17... Rab8 $14) 18. Qa3 $16 e6 19. d6 Qd8 20. Nd2 Bc6 {[#]} 21. Ba4 {[%CAl Ra4c6]} (21. Nxc4 $6 b5 $14) 21... Rc8 22. Nxc4 b5 23. Rxb5 Bxb5 24. Bxb5 Rf8 25. Rc1 Qh4 26. Nd2 (26. Qxa5 $6 Qxe4 27. Qa4 (27. Bxd7 Rxc4 28. g3 Rb8 $11) 27... Rfd8 $14) (26. Nxa5 $6 Ne5 $16) 26... Nf6 {This move loses the game for Black.} (26... Ne5 $16 27. c4 (27. Qxa5 Qh5 $11) 27... Rb8) 27. c4 $18 ({Less strong is} 27. Qxa5 Ng4 $16) 27... Rb8 28. Qd3 ({Weaker is} 28. Qxa5 Ng4 $18) 28... Ng4 29. Nf3 Qh5 30. Bd4 Ne5 31. Nxe5 Bxe5 32. Bxe5 Qxe5 33. c5 Rfd8 {intending ...Qb2.} 34. a4 Rbc8 35. Qe3 f5 36. f4 Qxe4 37. Qxe4 fxe4 {[%mdl 4096] Endgame KRR-KRB} 38. Ba6 Rc6 {[#]} 39. Bb7 $1 {[%CAl Rb7c6]} Rdxd6 {...Rc7 is the strong threat.} 40. Bxc6 Rxc6 { KR-KR} 41. Kf2 Kf7 42. Ke3 Ke7 43. Kxe4 Rc8 $2 (43... Kd7 44. Kd4 Rc8) 44. c6 { [%CAl Bc5c6,Bc6c7][%mdl 32]} Kd6 45. c7 h6 46. g4 g5 47. f5 exf5+ 48. Kxf5 { White mates.} Kd7 49. Kg6 Rg8+ 50. Kh7 Rc8 51. Kxh6 Rh8+ 52. Kxg5 Kc8 53. h4 Rg8+ 54. Kf4 Rf8+ 55. Kg3 Rf6 56. g5 Rb6 57. h5 Rb3+ 58. Kg4 Rb4+ 59. Kf5 Rxa4 60. g6 Rh4 61. g7 Rxh5+ 62. Kg6 {Weighted Error Value: White=0.07/Black=0.27} 1-0