[Event "2023 Winter Marathon"] [Site "https://lichess.org/DQDho6nC"] [Date "2023.12.29"] [White "otmar1"] [Black "MATALON"] [Result "1-0"] [UTCDate "2023.12.29"] [UTCTime "23:18:13"] [WhiteElo "1660"] [BlackElo "2462"] [WhiteRatingDiff "+11"] [BlackRatingDiff "-11"] [BlackTitle "IM"] [Variant "Standard"] [TimeControl "180+0"] [ECO "A45"] [Opening "Indian Defense"] [Termination "Normal"] [Annotator "lichess.org"] 1. d4 Nf6 { A45 Indian Defense } 2. Bf4 c5 3. c3 Qb6 4. Qc2 cxd4 5. cxd4 Nc6 6. Be3?? { (-0.36 → -2.53) Blunder. e3 was best. } (6. e3 d5 7. Nc3 Bf5 8. Qb3 Qxb3 9. axb3 e6 10. Bb5 Bb4) 6... d5?! { (-2.53 → -1.81) Inaccuracy. Nxd4 was best. } (6... Nxd4 7. Bxd4 Qxd4 8. Nf3 Qe4 9. Qd2 Qd5 10. Nc3 Qxd2+ 11. Nxd2) 7. Nf3 Bf5 8. Qc1?? { (-2.03 → -6.58) Blunder. Qb3 was best. } (8. Qb3 e6 9. Bd2 Qxb3 10. axb3 Nb4 11. Na3 Rc8 12. e3 a6 13. Nh4 Bc2 14. Rc1 Bd6) 8... Rc8 9. Nc3 Nb4 10. Ne5 Nc2+ 11. Kd1 Nxa1 12. Qxa1 e6 13. Bf4?! { (-6.83 → -10.38) Inaccuracy. f3 was best. } (13. f3 Bd6) 13... Bb4 14. Qc1 Ne4 15. e3 Bxc3 16. b3 Nxf2+ 17. Ke2 Nxh1 18. Qa3 Bb4 19. Qa4+ Ke7?? { (-16.76 → Mate in 2) Checkmate is now unavoidable. Kf8 was best. } (19... Kf8 20. Bg3 Qa5 21. Qxa5 Rc2+ 22. Kd1 Bxa5 23. a3 Rd2+ 24. Kc1 Nxg3 25. hxg3 Rf2 26. Bd3) 20. Qd7+ Kf6 21. Qxf7# { White wins by checkmate. } 1-0