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Inaccuracy: 5 Mistake: 3 Blunder: 2

Inaccuracy: 1 Mistake: 3 Blunder: 2

[Event "Rated game"]
[Site "/wrv25nkj"]
[Date "2025-01-14"]
[White "Derivat-Option"]
[Black "ronald-"]
[Result "0-1"]
[WhiteElo "1501"]
[BlackElo "1614"]
[PlyCount "86"]
[Variant "standard"]
[Annotator ""]

1. d4 c5 2. dxc5 e5 3. e4 Bxc5 4. Nf3 Nc6 5. Nc3 a6 6. Be2 Nf6 7. O-O h6 8. a3 d6 9. b4 Ba7 10. Bb2 b5 $6 { Inaccuracy. Best was c8e6. } 11. Bd3 Bg4 12. h3 Bh5 13. Be2 Bxf3 14. Bxf3 Nd4 15. Nd5 Nxd5 16. exd5 Nxf3+ 17. Qxf3 O-O 18. a4 Qb6 19. a5 $6 { Inaccuracy. Best was c2c3. } 19... Qb7 20. Qd3 f5 21. Rfd1 $6 { Inaccuracy. Best was c2c4. } 21... Rac8 22. Rac1 Qf7 $2 { Mistake. Best was c8c4. } 23. c4 bxc4 24. Rxc4 Rxc4 25. Qxc4 f4 26. Qxa6 $6 { Inaccuracy. Best was d1d2. } 26... f3 27. g3 $2 { Mistake. Best was g2g4. } 27... Qd7 $4 { Blunder. Best was f7f5. } 28. g4 $6 { Inaccuracy. Best was a6f1. } 28... h5 29. Qc6 $4 { Blunder. Best was b2e5. } 29... Qe7 30. b5 $4 { Checkmate is now unavoidable. Best was c6c4. } 30... hxg4 $2 { Lost forced checkmate sequence. Best was e7h4. } 31. hxg4 $4 { Checkmate is now unavoidable. Best was b5b6. } 31... Qh4 32. b6 Qxg4+ $2 { Lost forced checkmate sequence. Best was h4h3. } 33. Kf1 Qg2+ $4 { Blunder. Best was f8c8. } 34. Ke1 Qg1+ 35. Kd2 Qxf2+ 36. Kc1 Qe3+ 37. Kb1 $6 { Inaccuracy. Best was c1c2. } 37... Bb8 $2 { Mistake. Best was f3f2. } 38. a6 $2 { Mistake. Best was c6d7. } 38... f2 39. a7 $2 { Mistake. Best was c6b5. } 39... Bxa7 40. bxa7 Qxa7 $2 { Mistake. Best was f2f1q. } 41. Qxd6 $4 { Blunder. Best was d1f1. } 41... f1=Q 42. Qe6+ Qff7 43. Qxe5 $4 { Checkmate is now unavoidable. Best was d1f1. } 43... Qg6+ 0-1

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https://www.szachy.club/game/wrv25nkj/black

Otwieranie A43 Old Benoni Defense