Illegal move by NEG 1.3
Posted: 21 Mar 2023, 10:54Hello dear forum members.
Here is a game where NEG 1.3 (one of my favourite engines) has played an illegal move.
It seems that the only legal move was an en passant capture, and that the engine didn't see it (if I understand correctly).
Here is a game where NEG 1.3 (one of my favourite engines) has played an illegal move.
[Event "?"]
[Site "?"]
[Date "2023.03.21"]
[Round "18"]
[White "Aquilon 0.0.5"]
[Black "NEG 1.3"]
[Result "1-0"]
[ECO "A30"]
[GameDuration "00:00:10"]
[GameEndTime "2023-03-21T10:02:19.660 CET"]
[GameStartTime "2023-03-21T10:02:09.185 CET"]
[Opening "English"]
[PlyCount "75"]
[Termination "illegal move"]
[TimeControl "40/20"]
[Variation "Symmetrical Variation"]
1. c4 {book} c5 {book} 2. Nf3 {book} Nf6 {book} 3. Ng5 Nc6 {-0.14/2 0s} 4. b3
e5 {-0.14/2 0s} 5. e3 Bd6 {-1.10/2 0s} 6. Qf3 a5 {-1.00/2 0s} 7. g3
b6 {-1.00/2 0s} 8. Nc3 Bb7 {-1.00/2 0s} 9. Bd3 g6 {-1.00/2 0s} 10. O-O
h5 {-1.00/2 0s} 11. Bb2 Rb8 {-1.10/2 0s} 12. Ne2 Qc8 {-1.00/2 0s} 13. Qxf6
Rg8 {-1.00/2 0s} 14. Qxd6 Ra8 {-1.00/2 0s} 15. Be4 Qd8 {-1.00/2 0s}
16. Bxc6 {0.56s} Bxc6 {-1.00/2 0s} 17. Qxe5+ {0.56s} Qe7 {0.00/2 0s} 18. Nxf7
Kxf7 {-1.00/2 0s} 19. Qc7 {0.54s} Be4 {-1.00/2 0s} 20. Qf4+ Ke6 {-0.12/2 0s}
21. Qxe4+ Kd6 {-0.10/2 0s} 22. Be5+ Qxe5 {-0.10/2 0s} 23. Qf3 g5 {-1.00/2 0s}
24. d4 Qe6 {0.00/2 0s} 25. dxc5+ bxc5 {0.00/2 0s} 26. Rfd1+ Ke7 {-9.50/2 0s}
27. Nd4 Qf6 {0.00/2 0s} 28. Nc6+ dxc6 {+3.31/2 0s} 29. Rd7+ Kxd7 {0.00/2 0s}
30. Qxf6 Rab8 {-1.00/2 0s} 31. Qf7+ Kd6 {0.00/2 0s} 32. Rd1+ Ke5 {-0.10/2 0s}
33. Qc7+ Kf5 {-0.10/2 0s} 34. Qh7+ Rg6 {-0.10/2 0s} 35. Qf7+ Ke5 {0.00/2 0s}
36. Qxg6 g4 {0.00/2 0s} 37. Rd7 Rc8 {0.00/2 0s}
38. f4+ {Black makes an illegal move: b8c8} 1-0
It seems that the only legal move was an en passant capture, and that the engine didn't see it (if I understand correctly).