Author: Christophe Theron
Date: 20:16:25 05/31/01
Go up one level in this thread
On May 31, 2001 at 20:16:42, Michael Conway wrote:
>On May 31, 2001 at 14:28:37, Christophe Theron wrote:
>
>>On May 31, 2001 at 05:00:59, Michael Conway wrote:
>>
>>>In this game, Chess Tiger blundered away a knight in the opening with the
>>>terrible 7...h6?? and then came back to crush ChessGenius using a powerful pawn
>>>push.
>>>
>>>I think this game shows the importance of the opening book, especially in a
>>>weaker chess engine (7...Qe7 is the book continuation). The game also showed
>>>ChessGenius' weakness in evaluating advanced and passed pawns.
>>>
>>>Interestingly, Genius likes 7...Qe7 after around three seconds of evaluation
>>>while Tiger after six minutes in analysis mode preferred 7...Be7 (after giving
>>>7...Qh4 a long look). Tiger never gave 7...Qe7 serious consideration.
>>>
>>>Christophe, I noticed in analysis mode that if Tiger had given itself several
>>>seconds to look at 7...h6, it wouldn't have played it. Can anything be done to
>>>the program to reduce the likelihood of such blunders?
>>>
>>>Thanks.
>>>
>>>
>>>TRGpro overclocked to 28 MHz. No PB.
>>>
>>>[Event "10-min Game"]
>>>[Site "Brooklyn"]
>>>[Date "2001.05.31"]
>>>[Round "1"]
>>>[White "ChessGenius"]
>>>[Black "Chess Tiger"]
>>>[Result "0-1"]
>>>
>>>1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Nd7 6. Nxd7 Bxd7 7. Qe2 h6
>>>8. f3 Bc6 9. fxe4 dxe4 10. c3 Qe7 11. Bc4 g6 12. O-O f5 13. g4 Qg7
>>>14. Bf4 Bd6 15. Bxd6 cxd6 16. Nd2 d5 17. Bb5 O-O 18. gxf5 gxf5+ 19. Kh1 Kh7
>>>20. Rg1 Qf7 21. Raf1 f4 22. Bxc6 bxc6 23. Qg4 h5 24. Qg5 f3 25. Qg3 Rab8
>>>26. b3 Rbe8 27. c4 Rg8 28. Qd6 Rxg1+ 29. Rxg1 f2 30. Rf1 e3 31. Qxc6 e2
>>>32. Qxd5 Qxd5+ 33. cxd5 e1=Q 34. Kg2 Qxd2 35. h4 Rg8+ 36. Kf3 Qd3+
>>>37. Kxf2 Rf8+ 38. Kg2 Qxf1+ 39. Kg3 Rf3+ 40. Kh2 Rh3# 0-1
>>
>>
>>
>>Thanks for pointing this out, Michael.
>>
>>I'll fix it today.
>>
>>
>>
>> Christophe
>
>Just out of curiosity, Christophe, when you say you'll fix it, do you mean
>you'll add 7...Qe7 to the opening book or will you do something additional to
>the engine itself?
I have been working on the engine since the release of the free version. The new
engine is better, but it would still blunder in this game. Actually it just
needs a few seconds more to avoid h6??, but at the time control you have used it
plays before realizing that the move is bad.
So the fix is to add Qe7 in the opening book.
And actually... guess what I have noticed today when I tried to add this move in
the book?
Well... I had ALREADY fixed this in the book, on May 2nd. But I did not
recompile the book, so the book which has been released with the free version
does not have this update (as you noticed).
Now I have recompiled the book (after fixing a number of other lines as well).
>Also, when you fix it, will you make the modified version of the program
>available to us?
I'm going to email you the new book right now.
If another Chess Tiger for Palm user wants this update, please send me a request
at
support@chesstiger.com
Christophe
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