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Puzzles (3 cohencoins award for each match):

Puzzle mOZor: 828

GM Nathan4 (1305) −8

Puzzle UfYPL: 999999999

Ayaan (1419?) +20
FEN
[Event " MrCohenOS Arena"] [Site "https://cohenchessclub.com/qOCC6kQt"] [Date "2025.09.05"] [White "Nathan4"] [Black "Ayaan"] [Result "0-1"] [UTCDate "2025.09.05"] [UTCTime "23:14:00"] [WhiteElo "1305"] [BlackElo "1419"] [WhiteRatingDiff "-8"] [BlackRatingDiff "+20"] [WhiteTitle "GM"] [Variant "Standard"] [TimeControl "420+2"] [ECO "B01"] [Opening "Scandinavian Defense: Mieses-Kotroc Variation"] [Termination "Normal"] [Annotator "cohenchessclub.com"] 1. e4 d5?! { (0.33 → 0.96) Inaccuracy. c5 was best. } (1... c5 2. Nf3 d6 3. Nc3 e5 4. Bc4 Be7 5. d3 Nc6 6. O-O h6 7. Nd5 Nf6 8. Nxf6+) 2. exd5 Qxd5 { B01 Scandinavian Defense: Mieses-Kotroc Variation } 3. Nc3 Qd8 4. Nf3 Nc6 5. Bb5 e5?? { (1.34 → 3.18) Blunder. e6 was best. } (5... e6 6. d4) 6. O-O Bd7?! { (2.71 → 3.49) Inaccuracy. Bd6 was best. } (6... Bd6 7. Nxe5) 7. d3?? { (3.49 → 1.46) Blunder. Re1 was best. } (7. Re1 Be7) 7... Qe7?? { (1.46 → 4.67) Blunder. Bd6 was best. } (7... Bd6 8. Bxc6) 8. Bg5? { (4.67 → 2.56) Mistake. Bxc6 was best. } (8. Bxc6 Bxc6) 8... Nf6?? { (2.56 → 5.45) Blunder. f6 was best. } (8... f6 9. Bxc6) 9. Nd5?? { (5.45 → 1.48) Blunder. Bxc6 was best. } (9. Bxc6 bxc6) 9... Qc5?? { (1.48 → 5.37) Blunder. Qd6 was best. } (9... Qd6 10. Ne3) 10. Bc4?? { (5.37 → -5.38) Blunder. Nxc7+ was best. } (10. Nxc7+ Kd8) 10... O-O-O?? { (-5.38 → 4.57) Blunder. Nxd5 was best. } (10... Nxd5 11. b4) 11. Bxf6?? { (4.57 → 2.25) Blunder. Nxf6 was best. } (11. Nxf6 gxf6) 11... gxf6 12. Nxf6 Qd6 13. Nxd7 Qxd7?! { (2.79 → 4.24) Inaccuracy. Rxd7 was best. } (13... Rxd7 14. c3 a6 15. Re1 Kb8 16. Qe2 Bg7 17. Qe4 Rf8 18. Qf5 b5 19. Bb3 Qxd3 20. Re4) 14. c3? { (4.24 → 2.44) Mistake. Ng5 was best. } (14. Ng5 Rg8) 14... Bd6?! { (2.44 → 3.30) Inaccuracy. f6 was best. } (14... f6 15. Nh4) 15. d4? { (3.30 → 1.62) Mistake. Ng5 was best. } (15. Ng5) 15... Qe8?? { (1.62 → 4.04) Blunder. exd4 was best. } (15... exd4 16. cxd4 h5 17. Re1 Kb8 18. a3 Qg4 19. Bxf7 Qg7 20. Be6 Bc5 21. d5 Qxb2 22. Qb1) 16. dxe5? { (4.04 → 2.53) Mistake. Re1 was best. } (16. Re1 f6 17. Bd5 Kb8 18. Qc2 Ne7 19. Be4 c6 20. dxe5 fxe5 21. Rad1 Rf8 22. g3 Qf7) 16... Nxe5 17. Nxe5?! { (2.69 → 1.75) Inaccuracy. Re1 was best. } (17. Re1 f6) 17... Bxe5? { (1.75 → 3.41) Mistake. Qxe5 was best. } (17... Qxe5) 18. Qg4+ Rd7?? { (3.09 → 7.59) Blunder. Kb8 was best. } (18... Kb8 19. Rfe1) 19. Bb5?? { (7.59 → 2.96) Blunder. Rfe1 was best. } (19. Rfe1 Qe7 20. Rad1 Rd8 21. Rxd7 Rxd7 22. g3 Qf6 23. Bf1 h5 24. Qxh5 Rd2 25. Re2 Rxe2) 19... c6 20. Bd3? { (3.14 → 1.65) Mistake. Bc4 was best. } (20. Bc4) 20... Qf8?? { (1.65 → 8.22) Blunder. Kb8 was best. } (20... Kb8 21. Qf5 Bc7 22. Rae1 Qd8 23. Bc2 Rd5 24. Qxf7 Rd7 25. Qc4 Rd2 26. Rd1 h5 27. Rxd2) 21. Bf5 Qh6 22. Bxd7+ Kc7 23. Bf5?? { (9.08 → Mate in 1) Checkmate is now unavoidable. g3 was best. } (23. g3) 23... Qxh2# { Black wins by checkmate. } 0-1
Computer analysisMove timesCrosstableFEN & PGN
Reconnecting