[Event "FSIM February 2021"] [Site "Budapest HUN"] [Date "2021.02.13"] [Round "7.2"] [White "Mendonca, Leon Luke"] [Black "Juhasz, Agoston"] [Result "0-1"] [ECO "D37"] [WhiteElo "2544"] [BlackElo "2341"] [Annotator "Yip"] [PlyCount "134"] [EventDate "2021.02.06"] [EventType "tourn"] [EventRounds "9"] [EventCountry "HUN"] [EventCategory "2"] [SourceTitle "TWIC 1372"] [Source "Mark Crowther"] [SourceDate "2021.02.22"] [SourceVersion "1"] [SourceVersionDate "2021.02.22"] [SourceQuality "2"] 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bf4 O-O 6. a3 Nbd7 7. Nb5 Ne8 8. e3 {The position is equal.} a6 9. Nc3 dxc4 $1 10. Bxc4 b5 11. Be2 $36 {[%mdl 2048] White is pushing.} Bb7 $146 ({Predecessor:} 11... c5 12. O-O Bb7 13. d5 exd5 14. Nxd5 Bd6 15. a4 c4 16. Bg5 f6 17. Bh4 Nc5 18. axb5 axb5 {1-0 (32) Mamedyarov,S (2772)-Jakovenko,D (2698) Jerusalem 2019}) 12. b4 {Preveenting the normal ..c5 freeing break} a5 {Fighitng for some freedom} 13. Rb1 $11 (13. Bxb5 axb4 14. axb4 Bxb4 $17) 13... c6 $2 {This looks horrible for the Bb7} ( 13... Nef6 $11 {keeps the balance.} 14. O-O axb4 15. axb4 {tr 13..axb5} Nb6 $11 ) (13... axb4 14. axb4 Nef6 15. Nxb5 (15. Bxb5 Nb6 $1 {is a surprising resource threatening ..Nd5 winning back the b4-pawn} 16. O-O (16. Bg3 $2 Nfd5 $17) 16... Nfd5 17. Nxd5 Nxd5 $11) 15... Nd5 16. O-O N7f6 $11 (16... N7b6) 17. Qb3 (17. Bg3 $4 c6 $19) 17... Nxf4 18. exf4 Nd5 19. g3 Bxb4 $11 {Regains the pawn with a nice game}) 14. O-O $16 Nb6 15. Qc2 Nd6 16. Bxd6 $1 {A key exchange that removes a piece that can occupy c4 for a piece that cannot influence it} Bxd6 {[#]} 17. Ne4 $1 Qe7 {[%CAl Ra5b4]} 18. Nxd6 {Removing the better bishop of the pair and White looks forward to an excellent good knight vs bad bishop configuration} Qxd6 {[#]} 19. Ng5 $1 {[%csl Gg5][%CAl Rc2h7] The knight gains a tempo with a mate threat on the way to the key c5-outpost} ({ But not} 19. bxa5 $6 Rxa5 20. Ng5 f5 $11) 19... g6 20. Ne4 Qe7 21. Rfc1 { Bringing the last piece into play} (21. Nc5 {is also good} Ra7 22. Rfd1 $16) 21... Ra7 (21... axb4 $142 22. axb4 Na4 23. Bf3 Rfd8 24. Rb3 Kg7 $16) 22. Qc5 { Going for an endgame bind but White could just have well kept the queens on for an excellent middllegame} (22. Nc5 axb4 23. axb4 Rfa8 24. Qe4 Nd5 25. Qe5 Ra3 $16) 22... Qxc5 23. Nxc5 {bxa5 is the strong threat.} Ba8 {White has various ways to increase the advantage with no risk. The Nc5 is well placed but also indirectly shields the c6-pawn from a frontal attack. The primary weakess is the c6-pawn/passive Ba8 but this will not be enough to break the defence. The next phase will be to make every improving move possible before creating a second front on the kingside} 24. f3 {Preparing to improve the king. Immediately gaining more kingside space is also possible} (24. h4 $16) (24. g4 $16 {This advance prevents ..h5 which would seem unlikely as adding another pawn onto a light squares is not great news for the Ba8}) 24... Rc8 25. Kf2 { Black has no active play so improving the king is logical} Kf8 {[#]} 26. e4 ( 26. Ra1 $18 Ke7 27. Nb3 axb4 28. axb4 Rcc7 29. Nc5 f6 30. e4 $18) (26. g4 $18) 26... Ke7 (26... Rd8 $142) 27. Nb3 axb4 28. axb4 Ra3 {[#] At long last Black has a bit of activity but the evaluation of the position does not changed} 29. Na5 (29. g4 {Gaining more kingside space is also possible} h6 30. h4 $16) 29... Kd7 $6 (29... Ra4 $16 {was worth a try.}) 30. Ra1 $18 {Exchanging off Black's most active piece makes sense to reduce potential counterplay} (30. h4 $18) ( 30. g4 $16) 30... Rxa1 31. Rxa1 Rc7 (31... Kc7 32. Rc1 Kd6 33. f4 $18 {Black is getting slowly suffocated} (33. g4)) 32. Nb3 (32. g4 $18) 32... Na4 33. Ke3 (33. g4 Rc8 34. h4 $18) 33... Bb7 {[#]} 34. Na5 (34. g4 $18) (34. h4 $18) 34... Ba8 {[#]It is not so clear why this bishop should be saved but RB vs RN is also a great ending for White given that play on both wings favors the bishop and the Na4 is on the edge and needs some time to be improved} (34... f6 $18) 35. h4 {Now White turns attention to gaining space on the kingside} h6 36. g4 Ke7 37. Rc1 Kd7 38. Kf4 (38. f4 {Gaining even more space is a strong plan} Kd6 39. Nb3 Nb6 40. Nc5 Ra7 41. Rh1 Ra3+ 42. Kf2 Ra2 43. h5 $1 $18) 38... Kd6 39. Bd3 Ra7 (39... Nb6 $142 40. Kg3 Rc8) 40. Ra1 Rc7 41. Nb3 Bb7 42. g5 h5 43. Nc5 Nxc5 (43... Bc8 44. e5+ (44. Nxa4 Ra7 $16 {[%mdl 64] Pin}) 44... Ke7) 44. bxc5+ {[%mdl 4096] Endgame KRB-KRB} ({Weaker is} 44. dxc5+ Kd7 $16) 44... Kd7 45. Ke5 Bc8 46. Kf6 Kd8 47. Bc2 Rd7 48. Ke5 Ke7 49. Ra8 Rc7 50. Bb3 Bd7 51. f4 Bc8 52. Rb8 Bd7 53. Ra8 Bc8 {Black hopes to continue with ...Bd7.} 54. Ra1 Bd7 55. Ra2 Bc8 {Now ...Bd7 and Black clings on.} 56. Ra8 Bd7 57. Rh8 Ra7 (57... Rc8 $142 58. Rh7 Rf8) 58. f5 exf5 59. d5 {[%csl Gc5,Ge5][%CAl Rd5d6]} Be8 60. d6+ Kd8 61. exf5 gxf5 {[#]White has a crushing position} 62. Rh7 $4 {[%mdl 8192]} (62. Bc2 $18 Ra1 63. Bxf5 Re1+ 64. Kf6) ({Stockfish 13: 1)} 62. Rf8 f4 63. Bd1 Ra1 64. Bxh5 f3 65. Bxf3 Rc1 66. Bg4 Rxc5+ 67. Kf6 Rd5 68. d7 Rd6+ 69. Kg7 Rxd7 70. Bxd7 Kxd7 71. h5 b4 72. g6 f5 73. h6 b3 {[%eval 909,22]}) 62... f6+ $1 $19 { [%mdl 64] Discovered Attack. Black is clearly winning.} 63. Kxf5 Rxh7 64. Kxf6 b4 65. Bc2 Rf7+ 66. Ke5 Rf2 67. Bb3 Rf3 {Weighted Error Value: White=0.14/ Black=0.25} 0-1