A08 King's Indian Attack (1.g3 d5 2.Bg2 Nf6 3.Nf3 c5 4.O-O Nc6)

This is a rather old game, played over six years ago at Chess.com. At that time I was still creating open challenges and this is one of them. The game went wrong for me on move 11 when I moved my bishop to d7, which was passive and I should have gone for the aggressive square g4.

Armenia123 found the strongest reply 12.dxe4 and then I made the game losing blunder 12...Nxe4. A better alternative for me was 12...d4, but even then I would have been in serious trouble. The move 12...Nxe4 is a horrible move because it loses a piece by force. Had I not moved my bishop to d7 and ruined the connection between the queen and the bishop on d6, then the move Nxe4 would have been a playable option. The game ended with the moves 13.Nxe4 dxe4 14.Qxd6.

[Event "Let's Play!"] [Site "Chess.com"] [Date "2011.07.31"] [Round "?"] [White "Armenia123"] [Black "Vierjoki, Timo"] [Result "1-0"] [ECO "A08"] [WhiteElo "1733"] [BlackElo "1863"] [Annotator "Tactical Analysis 2.10 (30s), TV"] [PlyCount "27"] [EventDate "2011.??.??"] {[%evp 14,27,-54,-53,0,-26,-23,-43,46,43,108,127,508,516,541,514]} 1. g3 { A00 Hungarian Opening} d5 2. Bg2 Nf6 3. Nf3 c5 4. O-O Nc6 {A08 King's Indian Attack} 5. b3 e5 6. Bb2 Bd6 7. d3 (7. c4 d4 8. e3 O-O 9. exd4 cxd4 10. d3 h6 11. Re1 Bf5 12. a3 a5 13. Qc2 Nd7 14. Nbd2 Nc5 15. Ne4 Bxe4 16. dxe4 Qb6 17. Nd2 {1/2-1/2 (17) Aleksic,N (2417) -Pegorari,P (2380) Cutro 2001}) 7... O-O 8. Nbd2 {LiveBook: 9 Games. Black is slightly better.} Bf5 $146 {0.00/26} (8... Re8 $15 {-0.53/25} 9. e4 d4 10. a4 h6 11. Nc4 Be6 12. Nfd2 Bg4 13. f3 Bh5 14. Qe1 Nb4 15. Qd1 g5 16. Rf2 Qe7 17. Nxd6 Qxd6 18. Nc4 Qe7 19. Qd2 Nd7 20. f4 f6 21. Raf1 Rf8 22. Bh3 Nc6 23. Bf5 Kg7 {Macedo,A (1825)-Veiga,E (2082) Natal 2016 1-0 (45)}) (8... Bg4 9. e4 d4 10. h3 Bxf3 11. Nxf3 b5 12. a4 a6 13. Nh4 Re8 14. Nf5 Bf8 15. g4 c4 16. bxc4 bxc4 17. Ba3 Bxa3 18. Rxa3 c3 19. g5 Nd7 20. Qg4 Nf8 21. h4 Nb4 22. Rb3 a5 23. f4 {Kazarian,A (2162)-Paulet,I (2272) Amstelveen 2017 0-1 (37)}) (8... h6 9. c4 d4 10. Ne1 Be6 11. Ne4 Nxe4 12. dxe4 Rb8 13. Nd3 Qe7 14. f4 b5 15. f5 Bxc4 16. Rc1 Bxd3 17. exd3 f6 18. Bf3 a5 19. Bh5 Rfc8 20. Rb1 Nb4 21. a3 Na6 22. Qd2 Qd8 23. Rfc1 {Romano,J (1911)-Ruiz,C Buenos Aires 2003 0-1}) 9. e3 Re8 10. a3 e4 {0.46/25} (10... Qd7 $15 {-0.43/26} ) 11. Nh4 {[%tqu "En", "","","","f5g4","",10]} Bd7 {1.08/24} ({Better is} 11... Bg4 $1 $14 {0.43/27} 12. Bxf6 Bxd1 13. Bxd8 Bxc2) 12. dxe4 $16 Nxe4 $2 { 5.08/24 [%mdl 8192] [#]} (12... Be5 $16 {1.27/27}) 13. Nxe4 $18 dxe4 14. Qxd6 1-0 [Event "Chessmaster 8000 Rated Game"] [Site "?"] [Date "2002.09.19"] [Round "?"] [White "Vierjoki, Timo"] [Black "Tasha"] [Result "1-0"] [ECO "A08"] [Annotator "Tactical Analysis 2.10 (30s), TV"] [PlyCount "127"] [EventDate "2002.??.??"] 1. Nf3 {A04 Réti Opening} Nf6 2. g3 c5 3. Bg2 Nc6 4. O-O d5 {A08 King's Indian Attack} 5. e3 (5. b3 e5 6. Bb2 Bd6 7. c4 d4 8. e3 O-O 9. exd4 cxd4 10. d3 h6 11. Re1 Bf5 12. a3 a5 13. Qc2 Nd7 14. Nbd2 Nc5 15. Ne4 Bxe4 16. dxe4 Qb6 17. Nd2 {1/2-1/2 (17) Aleksic,N (2417)-Pegorari,P (2380) Cutro 2001}) 5... Bg4 {0.24/24} (5... e5 $17 {-0.79/21}) 6. d3 {-0.81/24} (6. h3 $11 {0.24/24} Bh5 7. d3) (6. d4 e6 7. Nc3 cxd4 8. exd4 Bd6 9. Bg5 h6 10. Bf4 Bxf4 11. gxf4 Ne4 12. h4 Bh5 13. Qe1 Nxc3 14. Qxc3 Rc8 15. Qb3 O-O 16. Qxb7 Bxf3 17. Bxf3 Nxd4 18. Bd1 Qxh4 19. Kg2 Qxf4 20. Qxa7 Nf5 {Villalba Galeano,A-Ramirez,L (1259) Ciudad del Este 2016 0-1}) 6... Qc7 $146 {0.08/23} (6... e5 $17 {-0.81/24}) (6... e6 7. b3 g6 8. Bb2 Bg7 9. Nbd2 O-O 10. h3 Bxf3 11. Nxf3 Re8 12. Qe2 e5 13. Rfd1 d4 14. e4 Nd7 15. Nd2 Qc7 16. Rf1 b5 17. a4 a6 18. f4 f6 19. h4 exf4 20. gxf4 Rac8 21. Rf2 {Lanchava,T (2276)-Gitu,P (1815) Tromsoe 2014 1-0 (52)}) 7. Nbd2 { -0.74/24} (7. h3 $11 {0.08/23} Bh5 8. b3) 7... Ne5 $2 {0.79/24 [#]} (7... Bh5 $17 {-0.74/24}) 8. h3 {White is better.} Nxf3+ {0.93/24} (8... Bxf3 $14 { 0.40/29} 9. Nxf3 Nc6) 9. Nxf3 $16 Bh5 {1.15/24} (9... Bxf3 $14 {0.43/28} 10. Qxf3 (10. Bxf3 O-O-O $14) 10... e5) 10. Qe1 {0.20/28} (10. b3 $16 {1.15/24}) 10... Bxf3 11. Bxf3 c4 {1.40/22} (11... Rd8 $11 {0.20/27}) 12. dxc4 {0.89/28} ( 12. e4 $142 {1.40/22}) 12... e6 {2.22/25} (12... Qxc4 $16 {0.89/28 was worth a try.} 13. Qd2 Rc8) 13. cxd5 $18 exd5 {2.69/23} (13... Nxd5 {1.94/26 might work better.} 14. Qe2 Rc8) 14. c3 {1.47/27} (14. e4 $18 {2.69/23}) 14... Bc5 { 1.97/22} (14... Bd6 $16 {1.47/27 is a better defense.} 15. Qe2 O-O) 15. b4 { 1.31/27} (15. b3 $18 {1.97/22}) 15... Bd6 $16 16. Bb2 {1.32/29} ({White should try} 16. Qe2 $18 {1.74/24}) 16... Qe7 {2.58/22} (16... O-O $16 {1.32/29 was necessary.} 17. Qe2 Be5) 17. Rd1 $18 Rd8 18. Qe2 {1.56/25} ({Better is} 18. Bxd5 $18 {2.63/24} Nxd5 19. Rxd5) 18... Kf8 $2 {3.51/23 [#]} (18... O-O $16 { 1.56/25} 19. Rd2 (19. Bxd5 Bxg3 20. Bg2 Be5 $16) 19... Qe6) 19. Rfe1 Be5 $2 { 3.94/22} (19... h5 {2.33/28} 20. c4 Bxb4) 20. e4 dxe4 21. Bxe4 ({Weaker is} 21. Rxd8+ Qxd8 22. Bxe4 Nxe4 $18) 21... Rxd1 22. Rxd1 $2 {1.53/27} (22. Qxd1 $18 { 4.81/25 is the precise move to win. aiming for Bxb7!} b6 23. Bc2) 22... Ne8 $2 {5.25/24} (22... Bxg3 $16 {1.53/27} 23. fxg3 Nxe4) 23. Qf3 h5 24. Bxb7 Rg8 $2 { 8.09/24} (24... h4 {3.99/27} 25. g4 Rh6) 25. h4 Nd6 26. Be4 Nxe4 27. Qxe4 g5 28. Rd5 Bf6 29. Qxe7+ Kxe7 30. hxg5 Bxg5 {Endgame KRB-KRB} 31. c4 h4 32. Kh2 hxg3+ 33. fxg3 Bf6 34. Bxf6+ Kxf6 {KR-KR} 35. Kg2 Rg4 36. Rc5 Rd4 37. a4 Ke6 38. Rc6+ Ke5 39. b5 Rd8 40. Rc7 Rd2+ 41. Kf3 Rc2 42. a5 Ke6 43. b6 axb6 44. axb6 Rb2 45. c5 Kd5 46. b7 f5 47. c6 {White mates.} Kc5 48. Rc8 Rb3+ 49. Kf4 Rb5 50. b8=Q Rxb8 51. Rxb8 Kxc6 {KR-KP} 52. Rf8 Kb5 53. Rxf5+ {KR-K} Kb4 54. g4 Kb3 55. g5 Kb2 56. g6 Kc2 57. g7 Kb2 58. g8=Q Kc3 59. Qd5 Kb2 60. Qd3 Ka2 61. Ra5+ Kb2 62. Re5 Ka1 63. Qd2 Kb1 64. Re1# {Accuracy: White = 51%, Black = 15%.} 1-0