[Event "USSR Championship"] [Site "Leningrad URS"] [Date "1974.12.02"] [Round "3"] [White "Rafael Vaganian (?)"] [Black "Viktor Kupreichik (?)"] [Result "1-0"] [WhiteElo "?"] [BlackElo "?"] [Variant "Standard"] [TimeControl "-"] [ECO "A45"] [Opening "Trompowsky Attack: Poisoned Pawn Variation"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. Bg5 c5 3. d5 Qb6 4. Nc3 { A45 Trompowsky Attack: Poisoned Pawn Variation } Qxb2 5. Bd2 Qb6 6. e4 d6 7. f4 g6 8. e5 dxe5 9. fxe5 Nfd7 10. Nf3 Bg7?! { (0.24 → 1.07) Inaccuracy. a6 was best. } (10... a6 11. Bc4 Bg7 12. Qe2 O-O 13. O-O Qd8 14. a4 Nb6 15. Ba2 Bg4 16. Rab1 N6d7 17. Bf4) 11. Rb1 Qd8 12. e6 fxe6 13. Ng5 Nf6 14. Bb5+ Kf8 15. dxe6 a6?! { (1.15 → 2.03) Inaccuracy. Nc6 was best. } (15... Nc6 16. O-O Kg8 17. Kh1 Qe8 18. Bd3 Nb4 19. Bb5 Nc6 20. Be3 h6 21. Nf7 Bxe6 22. Bxc6) 16. Be3 Qa5? { (2.41 → 4.87) Mistake. Qxd1+ was best. } (16... Qxd1+ 17. Rxd1 Bh6 18. Rd8+ Kg7 19. Rxh8 Bxg5 20. Rxc8 Bxe3 21. Bc4 Bg5 22. Rxc5 Bf4 23. Nd5) 17. O-O h6?? { (4.70 → Mate in 10) Checkmate is now unavoidable. axb5 was best. } (17... axb5 18. Rxb5 Ke8 19. Rxa5 Rxa5 20. Qd3 Nc6 21. Nb5 Nd5 22. Bxc5 Be5 23. a4 Nf4 24. Qf3) 18. Qd3 Kg8 19. Qxg6 Bxe6 20. Nxe6 Rh7 21. Rxf6 Nd7 22. Bxd7?! { (Mate in 12 → 16.91) Lost forced checkmate sequence. Nd5 was best. } { Black resigns. } (22. Nd5 Qxb5 23. Rxb5 Kh8 24. Rxb7 Bxf6 25. Rxd7 Rg7 26. Nxg7 Bh4 27. Qxh6+ Kg8 28. Nxe7+ Bxe7) 1-0