[Event "Masthanaiah chess world 1978"] [Site "https://lichess.org/0LI8vqP6"] [Date "2022.11.08"] [White "Turbotronik"] [Black "DmitrySibiryakov"] [Result "0-1"] [UTCDate "2022.11.08"] [UTCTime "10:24:06"] [WhiteElo "2383"] [BlackElo "2096"] [WhiteRatingDiff "-8"] [BlackRatingDiff "+137"] [Variant "Standard"] [TimeControl "420+3"] [ECO "E83"] [Opening "King's Indian Defense: Sämisch Variation, Panno Formation"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. c4 d6 3. Nc3 g6 4. e4 Bg7 5. f3 Nc6 6. Nge2 O-O 7. Be3 a6 { E83 King's Indian Defense: Sämisch Variation, Panno Formation } 8. Qd2 Na5 9. Nc1 b6 10. Be2 c5 11. O-O?! { (0.96 → 0.35) Inaccuracy. Nb3 was best. } (11. Nb3 Nxb3 12. axb3 Rb8 13. d5 Nd7 14. h4 h5 15. Bh6 b5 16. g4 Nf6 17. O-O-O Qa5) 11... Nc6 12. Nb3 e5 13. dxe5 dxe5 14. Nd5 Nh5 15. Nc1 f5 16. Bd3 f4 17. Bf2 g5 18. h3?! { (0.11 → -0.52) Inaccuracy. b4 was best. } (18. b4 Nxb4 19. Nxb4 cxb4 20. c5 b5 21. Rd1 Qe7 22. Be2 g4 23. fxg4 Nf6 24. Qxb4 Nxg4) 18... Nd4?! { (-0.52 → 0.14) Inaccuracy. a5 was best. } (18... a5 19. Rb1 Nd4 20. Ne2 Nf6 21. Rfe1 Nd7 22. a3 a4 23. Nec3 h5 24. Qd1 Nf6 25. Nxa4) 19. b4 Nxf3+ 20. gxf3 Bxh3 21. bxc5?? { (0.30 → -2.68) Blunder. Kh2 was best. } (21. Kh2 Bxf1) 21... g4 22. Kh2 Bxf1 23. Bxf1 g3+ 24. Kg1 gxf2+ 25. Qxf2 Qg5+?! { (-3.58 → -2.26) Inaccuracy. bxc5 was best. } (25... bxc5 26. Nb3 Qg5+ 27. Qg2 Ng3 28. Nc7 Rf6 29. Nxa8 Rg6 30. Nc7 Qh4 31. Nxc5 Nxf1 32. Rxf1) 26. Qg2 Qxg2+ 27. Kxg2 bxc5 28. Nd3 Rab8 29. Be2 Kf7 30. Rh1? { (-3.31 → -5.62) Mistake. Kf2 was best. } (30. Kf2 Ng3 31. Bd1 Bf6 32. Bb3 Rfc8 33. Rc1 a5 34. Re1 Bh4 35. Kg2 Nh5 36. Rd1 Rg8+) 30... Ng3 31. Re1 Rfc8 32. Bf1 h5 33. Kf2 Bf6?! { (-5.26 → -3.40) Inaccuracy. Nxf1 was best. } (33... Nxf1) 34. Bh3 Rg8 35. Nxc5?? { (-3.05 → -16.40) Blunder. Rd1 was best. } (35. Rd1 a5 36. Ke1 Rh8 37. Nc7 Rhd8 38. Nd5 Rd6 39. Rd2 Bg7 40. Rd1 a4 41. Nxc5 Rb2) 35... Rb2+ 36. Kg1 Nxe4+ 37. Kh1?! { (-17.69 → Mate in 5) Checkmate is now unavoidable. Bg4 was best. } (37. Bg4 Nxc5 38. Kf1 hxg4 39. Re2 Rxe2 40. Kxe2 g3 41. Nb4 g2 42. Nd3 Nxd3 43. Kxd3 Rd8+) 37... Nf2+ 38. Kh2 Nd3+ 39. Kh1 Nxe1?! { (Mate in 5 → -11.72) Lost forced checkmate sequence. Nf2+ was best. } (39... Nf2+ 40. Kh2 Nxh3+ 41. Kh1 Rgg2 42. Re2 Rbxe2 43. Nxf6 Rh2#) 40. Be6+ Kg7 41. Bxg8?! { (-12.59 → Mate in 3) Checkmate is now unavoidable. Nd3 was best. } (41. Nd3 Nxd3 42. Bxg8 Kxg8 43. Nxf6+ Kf7 44. Nd5 Rxa2 45. Kg1 Rc2 46. Nc7 Ne1 47. Nxa6 Nxf3+) 41... Kxg8?! { (Mate in 3 → -11.41) Lost forced checkmate sequence. Nxf3 was best. } (41... Nxf3 42. Ne6+ Kh6 43. Nxf6 Rh2#) 42. Nxf6+ Kf7 43. Nfe4 Nxf3 44. Nd3?! { (-57.85 → Mate in 1) Checkmate is now unavoidable. Ng5+ was best. } (44. Ng5+ Nxg5 45. Kg1 e4 46. Kf1 Rxa2 47. Ke1 e3 48. Nd3 Nf3+ 49. Kd1 Rd2+ 50. Kc1 Rxd3) 44... Rxa2?! { (Mate in 1 → -10.30) Lost forced checkmate sequence. Rh2# was best. } (44... Rh2#) 45. c5?! { (-10.30 → Mate in 1) Checkmate is now unavoidable. Ndf2 was best. } (45. Ndf2 Kg6 46. Kg2 Nd2 47. Nd6 Rc2 48. Kg1 Rc1+ 49. Kh2 Nxc4 50. Nc8 Rc2 51. Kg1 Nd2) 45... Rh2# { Black wins by checkmate. } 0-1