[Event "tatkogabko64's Study: Bíro, Karol (2019) - Sichnenko, Grigorij (1962)"] [Date "2025.11.10"] [Result "0:1"] [Variant "Standard"] [ECO "A46"] [Opening "Torre Attack: Classical Defense"] [StudyName "tatkogabko64's Study"] [ChapterName "Bíro, Karol (2019) - Sichnenko, Grigorij (1962)"] [ChapterURL "https://lichess.org/study/b3W74rie/AHkrbqdk"] [Annotator "https://lichess.org/@/tatkogabko64"] [UTCDate "2025.11.10"] [UTCTime "10:59:32"] [Orientation "white"] 1. Nf3 { [%eval 0.1] } 1... Nf6 { [%eval 0.18] } 2. d4 { [%eval 0.11] } 2... e6 { [%eval 0.14] } 3. Bg5 { [%eval -0.01] } 3... c5 { [%eval 0.0] } 4. Nc3 { [%eval 0.0] } 4... cxd4 { [%eval 0.0] } 5. Nxd4 { [%eval -0.15] } 5... a6 { [%eval 0.16] } 6. e4 { [%eval 0.13] } 6... Bb4 { [%eval 0.11] } 7. Bd3 { [%eval 0.13] } 7... Qc7 { [%eval 0.37] } 8. Ne2 { [%eval -0.13] } 8... Nc6 { [%eval -0.22] } 9. Qd2 { [%eval -0.18] } 9... Be7 { [%eval -0.15] } 10. f4 { [%eval -0.11] } 10... d6 { [%eval -0.06] } 11. O-O-O { [%eval 0.01] } 11... Rb8 { [%eval 0.44] } 12. Bxf6 { [%eval 0.29] } 12... Bxf6 { [%eval 0.3] } 13. g4 { [%eval 0.29] } 13... b5 { [%eval 0.26] } 14. g5 { [%eval 0.2] } 14... Be7 { [%eval 0.28] } 15. h4 { [%eval 0.3] } 15... Bd7 { [%eval 0.82] } 16. f5?? { [%eval -1.18] } { Blunder. Ng3 was best. } (16. Ng3 Nb4 17. Kb1 Nxd3 18. Qxd3 b4 19. Nce2 O-O 20. f5 Rfc8 21. Nd4 Bb5) 16... b4 { [%eval -1.07] } 17. Nb1 { [%eval -1.03] } 17... b3?? { [%eval 1.47] } { Blunder. Ne5 was best. } (17... Ne5) 18. axb3 { [%eval 1.26] } 18... Na5?! { [%eval 2.09] } { Inaccuracy. Ne5 was best. } (18... Ne5) 19. Qc3 { [%eval 2.09] } 19... Qb6?? { [%eval 4.59] } { Blunder. Qc5 was best. } (19... Qc5 20. Nf4 Qe5 21. Qxe5 dxe5 22. Nh5 g6 23. fxe6 fxe6 24. Nf6+ Bxf6 25. gxf6) 20. Nd2? { [%eval 2.65] } { Mistake. Qxg7 was best. } (20. Qxg7 Rf8 21. Nbc3 Nc6 22. Kb1 Ne5 23. Qxh7 Kd8 24. f6 a5 25. fxe7+ Kxe7) 20... O-O { [%eval 1.94] } 21. f6 { [%eval 1.75] } 21... Rfc8 { [%eval 1.78] } 22. Nc4 { [%eval 1.84] } 22... Nxc4 { [%eval 1.72] } 23. Bxc4 { [%eval 1.47] } 23... Bf8 { [%eval 1.76] } 24. h5 { [%eval 1.61] } 24... Bc6?? { [%eval 4.73] } { Blunder. Bb5 was best. } (24... Bb5) 25. Qd3?? { [%eval 1.35] } { Blunder. g6 was best. } (25. g6 Qc5 26. gxf7+ Kxf7 27. Rdf1 Qg5+ 28. Nf4 Ke8 29. Bxe6 Qxf6 30. Qxf6 gxf6) 25... d5 { [%eval 1.58] } 26. exd5 { [%eval 1.6] } 26... exd5 { [%eval 1.34] } 27. Bxd5?? { [%eval -0.87] } { Blunder. Bxa6 was best. } (27. Bxa6) 27... Bxd5 { [%eval -0.96] } 28. Qxd5?! { [%eval -2.06] } { Inaccuracy. fxg7 was best. } (28. fxg7) 28... Qe3+ { [%eval -1.89] } 29. Rd2?? { [%eval -4.24] } { Blunder. Kb1 was best. } (29. Kb1 Qxe2 30. Rd2 Qb5 31. Qf3 Qc6 32. Qh3 Rd8 33. Rf2 Rd6 34. fxg7 Bxg7) 29... Rd8 { [%eval -4.17] } 30. Nc3 { [%eval -4.23] } 30... Rxd5 { [%eval -4.25] } 31. Nxd5 { [%eval -4.1] } 31... Qxg5 { [%eval -4.14] } 32. Rd1 { [%eval -4.36] } 32... gxf6 { [%eval -4.38] } 33. Kb1 { [%eval -4.18] } 33... h6 { [%eval -4.12] } 34. Rd3 { [%eval -4.21] } 34... Bg7 { [%eval -4.52] } 35. Rf1 { [%eval -4.4] } 35... Qe5 { [%eval -4.25] } 36. Rf5 { [%eval -4.48] } 36... Qe1+ { [%eval -4.7] } 37. Ka2 { [%eval -5.3] } 37... Rb5 { [%eval -5.18] } 38. b4 { [%eval -4.59] } 38... Qe6 { [%eval -4.45] } 39. c4 { [%eval -5.04] } 39... Rxb4 { [%eval -5.52] } 40. Re3 { [%eval -5.47] } 40... Qd7 { [%eval -5.38] } 41. b3 { [%eval -5.38] } 41... Rb8 { [%eval -5.19] } 42. Ref3 { [%eval -5.75] } 42... Re8 { [%eval -5.29] } 43. Rxf6 { [%eval -5.74] } 43... Re2+ { [%eval -5.57] } 44. Ka3 { [%eval -5.58] } 44... a5 { [%eval -5.3] } 45. Rg3 { [%eval -5.31] } 45... Kh8 { [%eval -5.22] } 46. Rb6?? { [%eval #-14] } { Checkmate is now unavoidable. Rxh6+ was best. } (46. Rxh6+ Bxh6 47. Rg8+ Kxg8 48. Nf6+ Kf8 49. Nxd7+ Ke7 50. Nb6 Kd8 51. Ka4 Re5) 46... Bf8+ { [%eval -8.97] } 0:1