[Event "St Louis Inv GM 2019"]
[Site "Saint Louis USA"]
[Date "2019.11.21"]
[Round "1.4"]
[White "Stremavicius, T."]
[Black "Boros, De"]
[Result "1-0"]
[ECO "B14"]
[WhiteElo "2506"]
[BlackElo "2448"]
[Annotator "Tactical Analysis 2.20 (15s)"]
[PlyCount "87"]
[EventDate "2019.11.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "USA"]
[EventCategory "9"]
[SourceTitle "TWIC 1307"]
[Source "Mark Crowther"]
[SourceDate "2019.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.25"]
[SourceQuality "2"]
{[%evp 14,87,25,-24,29,-28,0,-25,27,-12,20,-8,24,-25,3,-51,0,-26,0,-38,9,-37,0,
-25,30,0,0,-24,-13,-20,0,0,0,0,51,0,36,39,57,10,10,9,49,9,76,76,76,72,80,59,70,
75,187,204,195,132,210,171,200,187,263,226,204,229,229,189,312,236,247,232,253,
245,255,236,479,479]} 1. c4 c5 2. Nf3 e6 3. Nc3 d5 4. cxd5 exd5 5. d4 Nc6 6. e3
Nf6 7. Bb5 cxd4 8. exd4 Bd6 9. Qe2+ (9. O-O O-O 10. h3 h6 11. Re1 Bf5
12. Ne5 Rc8 13. Bf4 Nb4 14. Ba4 Ne4 15. a3 Bxe5 16. Bxe5 Nc6 17. Nxe4 dxe4 18.
Bxc6 Rxc6 {1/2-1/2 (31) Zvjaginsev,V (2626)-Vidit,S (2722) Budva 2019}) 9...
Be6 10. Ng5 Qe7 (10... Qd7) 11. Nxe6 Qxe6 12. O-O O-O ({Predecessor:
} 12... Qxe2 13. Nxe2 O-O 14. Bg5 Ne4 15. Bh4 g5 16. Bg3 {0-1 (39) Kis Kos,
L-Turoczi,P LSS email 2007}) 13. Bxc6 (13. Be3) 13... bxc6 14. Qd3 ({
Better is} 14. Qxe6 fxe6 15. Be3) 14... Rfe8 15. Bd2 Ne4 16. Rae1 Qf5 (
16... Qg6) 17. Re3 (17. Nxe4 {should be considered.} dxe4 18. Qa6)
17... Qh5 {[%csl Gd6][%CAl Rh5h2]} 18. g3 {[%CAl Rc3e4]} f5 (18... Nxd2
19. Qxd2 Rxe3 20. Qxe3 Qg4) 19. Nxe4 fxe4 20. Qe2 Qxe2 21. Rxe2 c5 22. dxc5
Bxc5 23. Rd1 Rab8 (23... Rad8) 24. Bf4 (24. Bc3) 24... Rb5 25. a4 Ra5
26. Bc7 (26. b3) 26... Rxa4 {Hoping for ...d4.} 27. Rxd5 Rc4 28. Be5 a5 {
} (28... Kf7) 29. b3 {[%CAl Rb3c4][%mdl 2048] White is really
pushing.} Rc1+ 30. Kg2 {Strongly threatening Bb2.} Bb6 31. Rxe4 {aiming for
Rd7.} Rc2 32. Rf4 Re2 (32... Rf8) 33. Bc3 Rf8 34. Rd2 ({Less strong is
} 34. Bxa5 Rxf4 35. gxf4 Rxf2+ 36. Kg3 Rb2) ({White should play} 34. Rxf8+
$18 Kxf8 35. Rd2 (35. Bxa5 Rxf2+ 36. Kh3 Bxa5)) 34... Rfe8 (34... Rxf4
35. Rxe2 Rf8) 35. Rd7 R8e7 {} 36. Rd5 Ra2 (36... Rf7) 37. Rdf5 {
[%csl Gf4][%CAl Rf5f8]} h6 38. Rf8+ Kh7 39. R8f7 Rae2 (39... Rxf7 {keeps
fighting.} 40. Rxf7 Kg8 41. Rxg7+ Kf8) 40. R4f5 Kg6 41. Rxe7 Rxe7 42. Rb5 Re6
43. h4 ({Don't take} 43. Bxa5 Bxa5 44. Rxa5 Rb6) 43... h5 (43... Rc6
44. h5+ (44. Bxa5 Bxa5 45. Rxa5 Rb6) 44... Kh7) 44. Rg5+ {Accuracy: White
= 62% (17/10/35), Black = 35% (11/12/35).} 1-0
[Event "St Louis Inv GM 2019"]
[Site "Saint Louis USA"]
[Date "2019.11.23"]
[Round "4.1"]
[White "Matsenko, S."]
[Black "Boros, De"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "2533"]
[BlackElo "2448"]
[PlyCount "79"]
[EventDate "2019.11.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "USA"]
[EventCategory "9"]
[SourceTitle "TWIC 1307"]
[Source "Mark Crowther"]
[SourceDate "2019.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.25"]
[SourceQuality "2"]
{[%evp 0,49,21,14,56,19,23,22,16,22,26,38,25,30,40,44,45,45,38,38,42,38,52,50,
49,47,54,45,69,84,69,96,97,94,79,93,87,102,102,82,84,89,95,81,78,74,74,79,90,
94,101,77]} 1. Nf3 c5 2. c4 Nc6 3. e3 e5 4. Nc3 f5 5. d4 e4 6. d5 exf3 7. dxc6
dxc6 8. Qxd8+ Kxd8 9. gxf3 Be6 ({Relevant:} 9... Nf6 10. b3 g6 11. Bb2 Bg7 12.
O-O-O+ Ke7 13. h4 Be6 14. Be2 Rad8 15. Rdg1 Bf7 16. f4 h5 17. Na4 b6 18. Be5
Rhg8 19. f3 Nd7 20. Bxg7 Rxg7 21. Rd1 Rgg8 22. Rhe1 Nf6 23. Nb2 Rxd1+ 24. Rxd1
Rd8 25. Nd3 Nd7 26. Ne5 Nxe5 27. fxe5 Rxd1+ 28. Kxd1 Ke6 29. f4 Kd7 30. Kd2 Be6
31. Bd3 Kc7 32. Kc3 a5 33. e4 fxe4 34. Bxe4 Bf5 35. Kd3 Kd7 36. Ke3 Kc7 37.
Bxf5 gxf5 38. Kd3 Kd7 {1/2-1/2 (38) Petrov,N (2595)-Istratescu,A (2561) Abu
Dhabi 2019}) 10. b3 Be7 ({Predecessor:} 10... Nf6 11. Bb2 Bd6 12. O-O-O
Ke7 13. Bd3 Rhd8 14. f4 Rd7 15. Kc2 Rad8 16. f3 Kf8 17. Ne2 Ng8 18. h4 Be7 19.
Ng3 g6 20. e4 Bf6 21. Ba3 b6 22. exf5 gxf5 23. Bxf5 Rxd1 24. Rxd1 Rxd1 25. Kxd1
Bxh4 26. Bxe6 Bxg3 27. Bc1 Nf6 28. Bf5 h5 29. Ke2 h4 30. Bg4 Nxg4 31. fxg4 h3
32. Kf3 h2 33. Kg2 Kf7 34. a4 a6 35. Bd2 Kf6 36. Bc3+ Kf7 37. f5 Bf4 38. Be1
Kg7 39. Bh4 Kh6 40. Be7 {Rau,H (2455)-Skibbe,W (2274) Germany 2015 1-0 (79)})
11. Bb2 Bf6 12. O-O-O+ Ke7 13. Rg1 Nh6 {A flawed way to develop the knight}
(13... g6) 14. Na4 b6 {} (14... Bxb2+ 15. Kxb2 g6 16. Nxc5) 15.
Rxg7+ {Not so hard to see} (15. f4) 15... Bxg7 16. Bxg7 Nf7 17. Bxh8
Rxh8 18. f4 {Restricts Nf7} (18. Nb2 {Bringing the knight back into play is
also good} Rg8 (18... f4 19. Nd3 fxe3 20. fxe3) 19. Nd3) 18... Rg8 19.
f3 Rg6 20. Nc3 Nd6 21. Kc2 Rh6 22. Rd2 {Preparing to challenge the g-file as
well as securing the h-pawn} Bf7 23. Rg2 Bg6 24. Kd2 {The Rg2 is passive so
White brings the king to the kingside to secure the h-pawn and free Rg2 for
other action} Rh4 25. Ke1 Ne8 26. Kf2 Nf6 27. Kg1 Ne8 28. Rg3 Nd6 29. Kg2 Ne8
30. Rh3 {Forcing the rooks off} Rxh3 31. Kxh3 Nc7 32. Kg3 {White can now focus
on creating a kingside passer} Kf6 33. Bd3 Ne6 34. Kf2 h6 35. Ne2 a6 36. e4 Bh7
37. Ke3 {Every chance to improve piece position is taken} Ng7 38. Ng3 b5 39.
exf5 Nxf5+ 40. Bxf5 (40. Bxf5 Bxf5 41. Ne4+ {Wins another pawn} Ke7 42. Nxc5 a5
43. Kd4) 1-0
[Event "St Louis Inv GM 2019"]
[Site "Saint Louis USA"]
[Date "2019.11.24"]
[Round "6.2"]
[White "Hilby, Craig"]
[Black "Boros, De"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2414"]
[BlackElo "2448"]
[PlyCount "100"]
[EventDate "2019.11.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "USA"]
[EventCategory "9"]
[SourceTitle "TWIC 1307"]
[Source "Mark Crowther"]
[SourceDate "2019.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2019.11.25"]
[SourceQuality "2"]
{[%evp 0,38,17,17,27,-1,12,15,28,28,40,34,46,33,43,9,27,-2,7,4,-2,-9,-4,-4,-4,
-25,57,-10,-44,-44,-5,-35,6,9,-2,-31,-28,-78,-36,-44,-59]} 1. d4 Nf6 2. Bg5 c5
3. d5 d6 4. Nc3 h6 5. Bxf6 ({Relevant:} 5. Bd2 b5 6. Nxb5 Nxd5 7. e4 Nb6 8. a4
a6 9. Nc3 Nc6 10. f4 e6 11. Nf3 Be7 12. Bd3 O-O 13. a5 Nd7 14. Ne2 d5 15. b3
dxe4 16. Bxe4 Bb7 17. O-O Nf6 18. Bd3 Nb4 19. Bc4 Ne4 20. Be1 Bf6 21. c3 Nc6
22. Qc2 Nxa5 23. Bd3 Nd6 24. Ne5 Qc7 25. Ng4 Be7 26. c4 Nc6 27. Bc3 f5 28. Ne5
Bf6 29. Rae1 Rad8 30. Ng3 Nb4 31. Bxb4 cxb4 32. c5 Nb5 33. Qc4 Bxe5 34. Rxe5
Kh8 {Paravyan,D (2627)-Anton Guijarro,D (2643) Prague 2019 0-1}) 5... exf6 6.
e4 a6 7. Qf3 ({Predecessor:} 7. a4 g6 8. Bd3 Bg7 9. Nf3 Nd7 10. Nd2 Ne5
11. Be2 g5 12. O-O f5 13. f4 gxf4 14. exf5 Bxf5 15. Nde4 Ng6 16. Bg4 Bxg4 17.
Qxg4 Qd7 18. Qh5 O-O-O 19. a5 Rhe8 20. Na4 Kc7 21. Nb6 Qb5 22. Qf5 Re7 23. Rae1
Qxb2 24. Nxd6 Qd4+ 25. Kh1 Kxd6 26. Nc8+ Rxc8 27. Qxc8 Rxe1 28. Qd8+ Ke5 29.
Rxe1+ Kf5 30. Qd7+ Kg5 31. Qxf7 Qf2 32. Rb1 Qxc2 33. Qxb7 f3 34. gxf3 Be5 35.
f4+ Bxf4 36. Rg1+ Kh4 {Moreno Ruiz,J (2464)-Salgado Lopez,I (2627) Las Palmas
2017 0-1}) 7... g6 8. Bd3 Nd7 9. Qg3 b5 10. a4 c4 11. Be2 b4 12. Na2 Qb6 13. c3
bxc3 14. Qxc3 Nc5 15. a5 Qb3 16. Bxc4 Qxc3+ 17. Nxc3 Rb8 18. O-O-O Bg7 19. Nf3
Rb4 20. b3 f5 21. Kc2 O-O 22. Na2 Rb7 23. Nd4 fxe4 24. b4 Nd3 25. Nc6 Rc7 26.
Bxd3 exd3+ 27. Kxd3 Bf5+ 28. Kc4 Bc2 29. Rde1 Ba4 30. Re7 Rfc8 31. Rxc7 Rxc7
32. Rc1 Bb2 33. Re1 g5 34. Nc3 Bxc6 35. dxc6 Rxc6+ 36. Kb3 Bxc3 37. Rc1 d5 38.
Rxc3 Rd6 39. b5 d4 40. Rd3 axb5 41. Kb4 Kf8 42. Kxb5 Rd5+ 43. Kb4 Rd6 44. Kc5
Ra6 45. Kb5 Ra8 46. a6 Rb8+ 47. Ka5 Ke7 48. Rxd4 Rd8 49. Rxd8 Kxd8 50. a7 Ke7
1-0
[Event "St Louis Inv GM 2019"]
[Site "Saint Louis USA"]
[Date "2019.11.25"]
[Round "8.3"]
[White "Yoo, Christopher Woojin"]
[Black "Boros, De"]
[Result "1-0"]
[ECO "B35"]
[WhiteElo "2449"]
[BlackElo "2448"]
[Annotator "Yip"]
[PlyCount "120"]
[EventDate "2019.11.21"]
[EventType "tourn"]
[EventRounds "9"]
[EventCountry "USA"]
[EventCategory "9"]
[SourceTitle "TWIC 1308"]
[Source "Mark Crowther"]
[SourceDate "2019.12.02"]
[SourceVersion "1"]
[SourceVersionDate "2019.12.02"]
[SourceQuality "2"]
1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Be3 Nf6 7. Bc4 O-O 8.
Bb3 Re8 9. O-O ({Relevant:} 9. f3 d5 10. exd5 Nb4 11. Nde2 e6 12. d6 Nbd5 13.
Bd4 Qxd6 14. Bxd5 exd5 15. Qd2 b5 16. Nxb5 Qe7 17. Nbc3 Rb8 18. O-O-O Bf5 19.
g4 Qb4 20. b3 Nxg4 21. fxg4 Rxe2 22. Nxe2 Qa3+ 23. Kb1 Rxb3+ 24. axb3 Qxb3+ 25.
Ka1 Qa3+ 26. Kb1 {1/2-1/2 (26) Caruana,F (2819)-Dubov,D (2700) Paris 2019})
9... d6 10. h3 Na5 11. Re1 b6 12. Bg5 Bb7 13. f4 ({Predecessor:} 13. Qd3
a6 14. Ba4 b5 15. Ncxb5 axb5 16. Bxb5 Rf8 17. b4 e5 18. bxa5 exd4 19. a6 Bc8
20. Rab1 Qa5 21. e5 dxe5 22. Bxf6 Bf5 23. Qf3 Bxf6 24. g4 Bxc2 25. Qxf6 Bxb1
26. Rxb1 Rab8 27. a4 d3 28. Qxe5 d2 29. Rd1 Rbc8 30. Qf4 Qc3 31. Qxd2 Qxh3 32.
Bd7 Ra8 33. g5 Qh4 34. Qe3 Qb4 35. a7 Qa5 36. Bc6 Rxa7 37. Rd5 Qc7 38. Rd7 Qxd7
39. Bxd7 Rxd7 40. a5 Ra8 41. Kg2 Rda7 42. Kh2 Rxa5 {Vasilescu,M (1814)
-Pritchard,A (1552) Albena 2011 1/2-1/2}) 13... a6 14. Bxf6 Bxf6 15. Bd5 e6 16.
Bxb7 Nxb7 17. e5 Bg7 18. Nf3 Qc7 19. Qe2 Na5 20. Rad1 Nc4 21. exd6 Nxd6 22. Ne5
b5 23. Ne4 Rad8 24. Nxd6 Rxd6 25. Rxd6 Qxd6 26. c3 Rd8 27. Qe4 Qc5+ 28. Kh2 Qc7
29. a4 Rd5 30. axb5 axb5 31. Kh1 h5 32. Nf3 Bf6 33. h4 Kg7 34. g3 Qa7 35. Kg2
Qa2 36. Re2 Qa1 37. Rf2 Bd8 38. Nd4 Bb6 39. Rd2 b4 40. Qf3 Kg8 41. Qd1 Qa2 42.
Nf3 Be3 43. Rxd5 exd5 44. Qc2 Qc4 45. Qd1 {} (45. Ne5 Qc7 46. Qd3 Bc1 47.
cxb4 Bxb2) 45... b3 {Missing a great chance} (45... Qe4 46. Kf1 b3
47. Ne1 Bc5 48. Qxb3 Qe3) 46. Nd4 Bxd4 47. Qxd4 Qxd4 48. cxd4 {} Kg7
$2 {Black has a couple of ways to draw} (48... f5 {White can win the
b3-pawn but Black shockingly draws} 49. Kf3 Kf7 50. Ke3 Ke6 51. Kd3 Kd6 52. Kc3
Kc6 53. Kxb3 Kb5 {One would think the P+ should win} 54. Kc3 Ka5 55. b3 (55.
b4+ Ka4) (55. Kb3 Kb5) 55... Kb5 56. Kc2 Kb4 57. Kb2 Ka5 58. Ka3 Kb5
59. b4 Kc4 60. Ka4 Kxd4 61. b5 Ke3 62. b6 d4 63. b7 d3 64. b8=Q d2 65. Qb1 Ke2
66. Qb2 Ke1 67. Qe5+ Kf2 68. Qd4+ Ke2 69. Qb2 Ke1 {A rather odd draw}) (
48... Kf8 49. Kf3 Ke7 50. g4 hxg4+ 51. Kxg4 Kf6) 49. Kf3 Kf6 50. g4 Ke7
(50... hxg4+ 51. Kxg4 Kg7 52. f5 Kh6 53. f6 Kh7 54. Kg5 Kg8 55. h5 gxh5 56.
Kxh5 Kf8 57. Kh6 Kg8 58. Kg5 Kf8 59. Kf5) 51. f5 hxg4+ 52. Kxg4 Kf6 53.
Kf4 Kg7 54. fxg6 fxg6 55. Ke5 Kh6 56. Kxd5 Kh5 57. Kc6 g5 58. hxg5 Kg6 59.
d5 Kf5 60. d6 Ke5 1-0
