Re: bugs in gnu chess?

[Simon Waters]

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Aksis wrote:
> This is only for Chess Commander gnu chess 5 users. Open attachment.

Go on give the rest of us some background as to what is happening here.

> Open attachment and try take back! Won't work. The computer hangs on stale
> mate with infinite "thinking". It should be possible to take back when
> "thinking" in any cases, and at least when stale mate or stale mate should
> stop make it thinking immediately!
>
> Btw. check number 27. Black (computer) moves to Rxa4. That's a pretty
silly
> move when white can do Ra8 next and then Rxf8. I've set max thinking time.
> This must be another bug. Even an idiot does not do that the computer did
> now! It practically gave away the tower

Yes and current versions of GNU Chess find 26 Rxf3 winning a piece in
under 2 seconds on my rather old PC. What is the time variable in, what
is it running on, I assumed hundreths of a second but it must be
thousanths of a second I guess?

Similarly a quarter of a second to find 27. Rf5 instead of Rxa4.

Where did the version of GNU Chess come from? What version? Have they
nobled it in some way, such as specifying maximum depth?

I have some nagging concerns about interfaces with pondering/analysis,
as the output of the engine can overwhelm some of the GUI's in specific
situations. However I can't reproduce problems from this case, and have
no idea what Chess Commander is.

Oh PGN version of the game, it won't be setting the chess world on fire.

[Event ""]
[Site ""]
[Date ""]
[Round ""]
[White ""]
[Black "GNU Chess"]
[WhiteELO "0"]
[BlackELO "0"]
[Result ""]
1. e4 d6 2. Nh3 Nf6 3. Ng5 h6 4. Nh3 Nxe4 5. b3 Bxh3 6. gxh3 e6 7. Bg2
Nxf2 8. Kxf2 Qf6 9. Qf3 Qxf3 10. Bxf3 d5 11. a4 Nc6 12. Nc3 O-O-O 13.
Ba3 Bxa3 14. Rxa3 Nd4 15. Ra2 f5 16. Nb5 Nc6 17. c4 Nb4 18. Raa1 dxc4
19. bxc4 a6 20. Nc3 Rxd2 21. Kg3 f4 22. Kxf4 Rf8 23. Kg3 Rd3 24. Rhf1
Nc2 25. Rab1 Rxc3 26. Rxb7 Rxc4 27. Ra7 Rxa4 28. Ra8 Kd7 29. Rxf8 e5 30.
Rf7 Kd6 31. Rxg7 Rf4 32. Bg2 Rxf1 33. Bxf1 a5 34. Rg6 Kd5 35. Rxh6 a4
36. Ra6 Ne3 37. Bg2 Nxg2 38. Kxg2 Ke4 39. Rxa4 Kf5 40. Rc4 e4 41. Rxc7
e3 42. Re7 Kf4 43. Kf1 Kf3 44. Ke1 Kf4 45. Ke2 Kg5 46. Rxe3 Kh4 47. Kf2
Kg5 48. Re4 Kf5 49. Kf3 Kg5 50. h4+ Kf5 51. h5 Kg5 52. Re5+ Kh6 53. Kg4
Kg7 54. Re6 Kf7 55. Kf5 Kg7 56. h6+ Kh7 57. Kg5 Kg8 58. Re7 Kf8 59. Kf6
Kg8 60. h7+ Kh8 61. Kg6
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