[Event "2023 Summer Marathon"] [Site "https://lichess.org/xU8v4kwU"] [Date "2023.08.05"] [White "Viktor_Tahirov555"] [Black "Santutxu"] [Result "0-1"] [UTCDate "2023.08.05"] [UTCTime "15:34:14"] [WhiteElo "2453"] [BlackElo "1774"] [WhiteRatingDiff "-11"] [BlackRatingDiff "+11"] [Variant "Standard"] [TimeControl "60+0"] [ECO "A07"] [Opening "King's Indian Attack: Yugoslav Variation"] [Termination "Normal"] [Annotator "lichess.org"] 1. Nf3 d5 2. g3 c6 3. Bg2 Nf6 4. O-O Bg4 { A07 King's Indian Attack: Yugoslav Variation } 5. e3?! { (0.47 → -0.25) Inaccuracy. h3 was best. } (5. h3 Bh5 6. d4 e6 7. c4 Bd6 8. Qb3 Qb6 9. c5 Qxb3) 5... e6 6. h3 Bh5 7. g4 Bg6 8. Ne5 Nbd7 9. Nxg6 hxg6 10. d4 Bb4 11. c3 Ba5 12. c4?! { (-0.06 → -0.82) Inaccuracy. Nd2 was best. } (12. Nd2 Bc7 13. g5 Nh5 14. Qb3 Rb8 15. Nf3 O-O 16. Re1 f5 17. Bd2 Nb6 18. Bf1 Qe7) 12... Bc7 13. cxd5 cxd5?! { (-0.72 → 0.02) Inaccuracy. exd5 was best. } (13... exd5 14. Nd2) 14. Nc3 Rc8 15. Nb5?! { (0.03 → -0.55) Inaccuracy. g5 was best. } (15. g5 Nh5) 15... Bb8 16. Bd2 a6 17. Na3?! { (-0.65 → -1.38) Inaccuracy. Nc3 was best. } (17. Nc3 Nb6) 17... Qc7? { (-1.38 → -0.10) Mistake. Ne4 was best. } (17... Ne4 18. f4 g5 19. Rc1 Rxc1 20. Bxc1 f5 21. Nb1 Ndf6 22. Nd2 gxf4 23. exf4 Qb6 24. Qa4+) 18. Rc1?? { (-0.10 → Mate in 1) Checkmate is now unavoidable. f4 was best. } (18. f4) 18... Qh2# { Black wins by checkmate. } 0-1