[Event "Maehrisch-Ostrau"] [Site "Ostrava CSR"] [Date "1923.07.12"] [Round "9"] [White "Efim Bogoljubov (?)"] [Black "Siegbert Tarrasch (?)"] [Result "0-1"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "A05"] [Opening "Zukertort Opening: Nimzo-Larsen Variation"] [Termination "Unknown"] [Annotator "lichess.org"] 1. Nf3 Nf6 2. b3 { A05 Zukertort Opening: Nimzo-Larsen Variation } g6 3. Bb2 Bg7 4. e4 d6 5. d3 O-O 6. Nbd2 e5 7. g3 Bd7 8. Bg2 Qc8 9. h3 Re8 10. Qe2 a5 11. a4 Nc6 12. g4 h5 13. g5 Nh7 14. Nc4 Nf8 15. Ne3 Ne6 16. Nd5?! { (-1.02 → -1.87) Inaccuracy. Qd2 was best. } (16. Qd2 Nf4 17. Bf1 Nb4 18. h4 b5 19. axb5 Bxb5 20. Rh2 Qb7 21. Ng2 Nxg2+ 22. Bxg2 d5) 16... Nb4 17. Nxb4 axb4 18. Bc1 b5 19. a5 c5 20. O-O Nf4 21. Bxf4 exf4 22. Kh2 Bxa1 23. Rxa1 Qc7 24. Qd2 Rxa5 25. Rg1?! { (-2.06 → -3.18) Inaccuracy. Rxa5 was best. } (25. Rxa5 Qxa5 26. Qxf4 Qb6 27. Nd2 Be6 28. h4 Qc7 29. Nf1 c4 30. bxc4 bxc4 31. dxc4 Qxc4) 25... Ra2 26. Rc1 d5 27. e5 d4 28. Qxf4 Bc6 29. Re1?! { (-3.11 → -4.02) Inaccuracy. h4 was best. } (29. h4 Bxf3 30. Bxf3 Qxe5 31. Qxe5 Rxe5 32. Be4 Kg7 33. Kg3 Re6 34. f4 f5 35. gxf6+ Kxf6) 29... Rxc2 30. Nd2 Bxg2 31. Kxg2 Rxd2 32. Qxd2 Rxe5 33. Rxe5 Qxe5 34. f4? { (-3.93 → -6.51) Mistake. Kg1 was best. } (34. Kg1 Qf5 35. Kh2 Qf3 36. Qc2 Qf4+ 37. Kg1 Qxg5+ 38. Kf1 Kg7 39. h4 Qd5 40. Ke2 Kf6) 34... Qd5+ 35. Kg3 Qxb3 36. f5?! { (-6.73 → -9.76) Inaccuracy. Kg2 was best. } (36. Kg2 Qd5+ 37. Kh2 Qe6 38. Qd1 Qe3 39. Kg2 Qxf4 40. Qc2 Qxg5+ 41. Kf1 Qf5+ 42. Ke1 c4) 36... c4 37. Kh4 Qxd3 38. Qxb4?! { (-17.34 → Mate in 8) Checkmate is now unavoidable. Qe1 was best. } (38. Qe1 Qxf5 39. Kg3 c3 40. Qe8+ Kh7 41. Qd8 c2 42. Qc7 Qd3+ 43. Kh4 Qe4+ 44. Kg3 Qe1+) 38... Qxf5?! { (Mate in 8 → -52.47) Lost forced checkmate sequence. Qe3 was best. } (38... Qe3 39. Qd6 Qe1+ 40. Qg3 Qe4+ 41. Qg4 hxg4 42. fxg6 Qg2 43. gxf7+ Kxf7 44. g6+ Kxg6 45. hxg4) 39. Qd6?! { (-52.47 → Mate in 12) Checkmate is now unavoidable. Kg3 was best. } (39. Kg3 Qxg5+) 39... Qf2+ { Black wins. } 0-1