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Subject: Re: evaluationfunction tuning

Author: Uri Blass

Date: 08:27:27 09/08/03

Go up one level in this thread


On September 07, 2003 at 21:24:34, Joel wrote:

>Hey Jan,
>
>If you cannot beat TSCP all the time with a pretty advanced search function, I
>would be very worried about bugs.
>
>I don't like tuning my engine by hand -> I am no chess player, and it is mind
>numbing!
>
>Joel

Usually even programs at Gerbil level beat tscp but programs may lose not only
because of bugs.

Note that List4.61 lost against tscp in because of bad opening choice that was a
result of a bad evaluation.

see http://wbec-ridderkerk.nl/html/his4thedition.html
3rd Division Group B

I believe that the problem was not bad search but bad evaluation that caused
list to play stupid moves in the opening 1.e4 e5 2.Nf3 d5 3.exd5 e4 4.Qe2 when I
guess that later tscp did not see more forward but simply got a better position
and won the game becuse list4.61 had no plan and maybe in bad position it
decided to defend against threats that tscp even did not see.

Here is the game

[Event "WBEC4 3rd Div.Gr.B"]
[Site "DUAL-P3-933"]
[Date "2002.12.29"]
[Round "9.2"]
[White "TSCP 1.73"]
[Black "List 4.61"]
[Result "1-0"]
[PlyCount "127"]
[EventDate "2002.??.??"]
[TimeControl "40/2400:0"]

1. e4 e5 2. Nf3 d5 3. exd5 e4 4. Qe2 Nf6 5. Nc3 Be7 6. Nxe4 Nxd5 7. c4 Nb4 8.
d4 O-O 9. a3 N4c6 10. d5 Na5 11. Qc2 b5 12. cxb5 Qxd5 13. Nc3 Qe6+ 14. Be2 Re8
15. O-O h6 16. Be3 c5 17. Bd3 Bb7 18. Bh7+ Kf8 19. Nd2 Qg4 20. Be4 Bd6 21. Rad1
Nd7 22. Qa4 Bc7 23. b4 Bxe4 24. Ncxe4 cxb4 25. axb4 Nb7 26. Qa6 Nd8 27. Rfe1
Re6 28. Qa2 Nb6 29. h3 Qf5 30. Rc1 Qe5 31. Nf3 Qd5 32. Qc2 Be5 33. Nc5 Rg6 34.
Bxh6 Bf6 35. Bf4 Rc8 36. Re3 Kg8 37. Re8+ Kh7 38. Rd1 Qxf3 39. Qxg6+ Kxg6 40.
gxf3 Ne6 41. Rxc8 Nxf4 42. Rc7 Nxh3+ 43. Kf1 Nf4 44. Rxa7 Kf5 45. Rxf7 Kg6 46.
Ra7 Nbd5 47. Nd7 Bd8 48. b6 Bxb6 49. Nxb6 Nxb6 50. Rd6+ Kh7 51. Rxb6 Nd5 52.
Rb5 Nf4 53. Rg5 Ne6 54. Rgxg7+ Nxg7 55. b5 Kh8 56. b6 Kg8 57. b7 Kf7 58. b8=Q+
Kf6 59. Qf8+ Ke5 60. Qxg7+ Kd5 61. Qc7 Ke6 62. Qc6+ Kf5 63. Ra5+ Kf4 64. Qf6# {
white mates} 1-0



Uri



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