[Event "LOTTO POL-ch Men 2017"] [Site "Warsaw"] [Date "2017.03.24"] [Round "4"] [White "Jarmula, Lukasz"] [Black "Piorun, Kacper"] [Result "0-1"] [WhiteElo "2473"] [BlackElo "2648"] [Variant "Standard"] [TimeControl "-"] [ECO "D39"] [Opening "Queen's Gambit Declined: Ragozin Defense, Vienna Variation"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 { D39 Queen's Gambit Declined: Ragozin Defense, Vienna Variation } 6. e4 b5?! { (0.12 → 0.81) Inaccuracy. c5 was best. } (6... c5) 7. a4?! { (0.81 → 0.22) Inaccuracy. e5 was best. } (7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Qd5 11. Bxf6 Rg8 12. Qd2 Nd7 13. Nxd5 Bxd2+) 7... c5 8. dxc5?! { (0.47 → -0.18) Inaccuracy. axb5 was best. } (8. axb5 cxd4 9. Bxf6 Qxf6 10. Qxd4 Qxd4 11. Nxd4 Bb7 12. Ra4 Bd6 13. Bxc4 Nd7 14. Be2 Nc5) 8... Qxd1+ 9. Rxd1 a6 10. axb5?! { (-0.53 → -1.10) Inaccuracy. Nd2 was best. } (10. Nd2 O-O 11. Be2 Bd7 12. O-O Bc6 13. Be3 Nbd7 14. axb5 axb5 15. Nf3 Bxc5 16. Bxc5 Nxc5) 10... axb5 11. Nd4 Bd7 12. f3 Ra2 13. Rd2 Rxb2 14. Rxb2 Bxc3+ 15. Rd2 e5 16. Ne2 Bxd2+ 17. Kxd2 Na6 18. Nc3 Nxc5 19. Bxf6?! { (-2.44 → -3.40) Inaccuracy. Be2 was best. } (19. Be2 Nb3+) 19... gxf6 20. Nd5 Bc6 21. Nxf6+ Ke7 22. Ng4 f6 23. Kc3 Ra8 24. Be2? { (-3.45 → -5.55) Mistake. Kb2 was best. } (24. Kb2 Rd8) 24... Ra2 25. Bd1 Kd6 26. Nxf6 Nd3? { (-6.19 → -3.24) Mistake. Ne6 was best. } (26... Ne6) 27. Bc2?? { (-3.24 → -9.54) Blunder. Bb3 was best. } (27. Bb3) 27... Kc5 28. Bxd3? { (-8.76 → Mate in 1) Checkmate is now unavoidable. Kd2 was best. } (28. Kd2) 28... b4# { Black wins by checkmate. } 0-1