[Event "Tigran Petrosian 4"] [Site "https://lichess.org/GNomq5nx"] [Date "2021.06.20"] [White "PatriciaHdez"] [Black "Majalaviri"] [Result "0-1"] [GameId "GNomq5nx"] [UTCDate "2021.06.20"] [UTCTime "02:08:15"] [WhiteElo "2190"] [BlackElo "2372"] [WhiteRatingDiff "-3"] [BlackRatingDiff "+3"] [WhiteTitle "FM"] [BlackTitle "FM"] [Variant "Standard"] [TimeControl "180+2"] [ECO "A05"] [Opening "King's Indian Attack: Symmetrical Defense"] [Termination "Normal"] [Annotator "lichess.org"] 1. Nf3 { [%eval 0.13] } 1... Nf6 { [%eval 0.25] } 2. g3 { [%eval 0.11] } 2... g6 { [%eval 0.18] } { A05 King's Indian Attack: Symmetrical Defense } 3. Bg2 { [%eval 0.18] } 3... Bg7 { [%eval 0.23] } 4. O-O { [%eval 0.13] } 4... O-O { [%eval 0.25] } 5. c4 { [%eval 0.16] } 5... d6 { [%eval 0.36] } 6. Nc3 { [%eval 0.33] } 6... Nc6 { [%eval 0.48] } 7. d3 { [%eval 0.21] } 7... e5 { [%eval 0.32] } 8. Rb1 { [%eval 0.33] } 8... h6?! { (0.33 → 0.98) Inaccuracy. a5 was best. } { [%eval 0.98] } (8... a5 9. a3 Nd4 10. b4 axb4 11. axb4 c6 12. Bg5 Ne6 13. Bh4 Qc7 14. b5 Nh5 15. e3) 9. b4 { [%eval 0.91] } 9... Ne8 { [%eval 0.99] } 10. b5 { [%eval 0.97] } 10... Ne7 { [%eval 0.94] } 11. Qb3 { [%eval 0.77] } 11... Kh7 { [%eval 1.17] } 12. a4 { [%eval 1.14] } 12... f5 { [%eval 0.95] } 13. Nd2 { [%eval 0.82] } 13... f4 { [%eval 1.11] } 14. a5 { [%eval 0.89] } 14... Rb8 { [%eval 0.73] } 15. Nde4 { [%eval 1.1] } 15... Nf5 { [%eval 1.45] } 16. Nd5 { [%eval 0.96] } 16... Nd4 { [%eval 0.48] } 17. Qa2 { [%eval 0.77] } 17... Be6 { [%eval 1.17] } 18. a6?? { (1.17 → -0.62) Blunder. e3 was best. } { [%eval -0.62] } (18. e3 Nxb5 19. exf4 c6 20. fxe5 Bxd5 21. cxd5 Bxe5 22. Be3 Nec7 23. dxc6 bxc6 24. Qd2 Bg7) 18... bxa6 { [%eval -0.71] } 19. e3 { [%eval -0.81] } 19... fxe3?! { (-0.81 → 0.00) Inaccuracy. f3 was best. } { [%eval 0.0] } (19... f3) 20. fxe3 { [%eval 0.04] } 20... Rxf1+ { [%eval 0.0] } 21. Kxf1 { [%eval 0.0] } 21... Bxd5 { [%eval 0.0] } 22. exd4? { (0.00 → -1.12) Mistake. cxd5 was best. } { [%eval -1.12] } (22. cxd5 Nxb5 23. Kg1 Nf6 24. Bd2 Nxe4 25. Bxe4 Qg5 26. Rf1 Qg4 27. Bf3 Qf5 28. Be4) 22... Bxe4 { [%eval -1.22] } 23. Bxe4 { [%eval -1.37] } 23... axb5?! { (-1.37 → -0.61) Inaccuracy. Nf6 was best. } { [%eval -0.61] } (23... Nf6 24. Bc6 exd4 25. bxa6 Rxb1 26. Qxb1 Qc8 27. Bb7 Qf5+ 28. Kg2 h5 29. h4 Ng4 30. Bf4) 24. Qxa7? { (-0.61 → -2.12) Mistake. Rxb5 was best. } { [%eval -2.12] } (24. Rxb5 Nf6 25. Bf3 Nd7 26. dxe5 Nxe5 27. Be4 Rxb5 28. cxb5 Qd7 29. Bf4 Ng4 30. Bc6 Qf5) 24... exd4? { (-2.12 → -0.46) Mistake. b4 was best. } { [%eval -0.46] } (24... b4 25. d5 Nf6 26. Kg2 Qc8 27. Qa4 Qb7 28. Rb3 Qb6 29. Qa2 h5 30. Bg5 Nxe4 31. dxe4) 25. Rxb5 { [%eval -0.39] } 25... Rxb5 { [%eval -0.4] } 26. cxb5 { [%eval -0.46] } 26... Qf6+ { [%eval -0.07] } 27. Kg2 { [%eval -0.04] } 27... Qe5 { [%eval -0.03] } 28. Qb7 { [%eval -0.41] } 28... Nf6 { [%eval -0.4] } 29. Bf4?? { (-0.40 → -2.25) Blunder. Bf3 was best. } { [%eval -2.25] } (29. Bf3 Qc5 30. Qc6 Qc3 31. Qxc3 dxc3 32. Kf2 Nd7 33. Ke2 Nc5 34. Be3 c2 35. Kd2 Bd4) 29... Qc5 { [%eval -2.38] } 30. Bc6?? { (-2.38 → -6.63) Blunder. Qc6 was best. } { [%eval -6.63] } (30. Qc6 Nxe4 31. dxe4 Qh5 32. Qxc7 Qe2+ 33. Kg1 Qe1+ 34. Kg2 Qxe4+ 35. Kf2 d3 36. b6 Qe2+) 30... Qc2+ { [%eval -6.67] } 31. Kh3 { [%eval -6.58] } 31... Qxd3 { [%eval -6.54] } 32. Qxc7?! { (-6.54 → -12.61) Inaccuracy. Bf3 was best. } { [%eval -12.61] } (32. Bf3 g5 33. Kg2 Qc2+ 34. Kf1 gxf4 35. Qc6 Qxh2 36. Be4+ Kh8 37. Qa8+ Ng8 38. Bd5 Qh3+) 32... g5 { [%eval -8.42] } 33. Bxg5? { (-8.42 → Mate in 8) Checkmate is now unavoidable. Qb7 was best. } { [%eval #-8] } (33. Qb7 d5) 33... hxg5?! { (Mate in 8 → -10.45) Lost forced checkmate sequence. Qf1+ was best. } { [%eval -10.45] } (33... Qf1+ 34. Kh4 hxg5+ 35. Kxg5 Qe2 36. Be4+ Qxe4 37. Qc2 Qxc2 38. h3 Qc1+ 39. Kf5 Qe3 40. g4) 34. b6?! { (-10.45 → Mate in 3) Checkmate is now unavoidable. Qc8 was best. } { [%eval #-3] } (34. Qc8 Qf1+) 34... Qf1+ { [%eval #-2] } 35. Bg2 { [%eval #-2] } 35... g4+ { [%eval #-5] } 36. Kh4 { [%eval #-5] } 36... Qxg2 { [%eval #-5] } 37. b7 { [%eval #-3] } 37... Qxh2+ { [%eval #-2] } 38. Kg5 { [%eval #-2] } 38... Qh5+ { [%eval #-1] } 39. Kf4 { [%eval #-1] } 39... Qe5# { Black wins by checkmate. } 0-1