itch.io

Here's another game: I played the sharp 'B90 Sicilian Defense: Najdorf Variation, English Attack' and sacrificed my bishop to gain a strong attack. Notice that black(AI) isn't moving any pawn to attack my King. And when I was about to deliver checkmate, Its eval showed 00.25!

Additionally, I think your Chess AI cannot play openings that require sacrifices or strong pawn attacks, such as the Sicilian Defence, or the English opening I showed I my previous comment.

https://lichess.org/DjkVv9j6#59

In this game, the AI just allows me to checkmate instead of taking the Knight with its Queen.

pgn:

1. c4 g6 2. Nc3 Nc6 3. e3 Nf6 4. d4 e5 5. Nf3 e4 6. Ng1 Bb4 7. f3 Bxc3+ 8. bxc3 d5 9. cxd5 Nxd5 10. Qc2 Bf5 11. fxe4 Qh4+ 12. Qf2 Qxe4 13. Bd2 Qc2 14. Nf3 Nxc3 15. Bc4 Qb2 16. O-O Nb1 17. Bxf7+ Kxf7 18. Ng5+ Ke7 19. e4 Qxa1 20. exf5 Qxa2 21. Qe3+ Kd6 22. Qf4+ Kd7 23. f6 Nxd2 24. Qg4+ Kd8 25. Ne6+ Kc8 26. Nc5+ Kb8 27. Nd7+ Kc8 28. Nb6+ Kb8 29. Qc8+ Rxc8 30. Nd7#