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Re: about gnuchess
From: |
Guest |
Subject: |
Re: about gnuchess |
Date: |
Fri, 11 Jul 2008 12:24:16 -0500 |
I don't know if you are interested in GNU Chess specifically or if it's just
because it's available in source.
If your interest in just because it's there, then I'd suggest going to:
http://chessprogramming.wikispaces.com/
http://www.talkchess.com/forum/viewforum.php?start=0&f=7&topic_view=flat
The first is a wiki that has lots of basic material on chess programming.
The second is a very popular forum on chess programming where you can ask
questions.
Also, it's worth pointing out there are many free chess programs available
in source. Many of them are much stronger than GNU Chess was before it was
abandoned. And there are many that are much easier to understand than GNU
Chess is.
If your interest is in GNU chess specifically, then you might want to look
at some of the older versions which were much more simple.
"Li, Chendong" <address@hidden> wrote in message
news:address@hidden
Dear Sir,
I am very interested in gnuchess and I want know more information about it.
Could you please tell me where I could find more detailed documentation
about gnuchess. I have read the the file eval.c, but I am still not clear
about the how the evaluation function works for a specified scenario. Could
you please tell me how the scoring algorithm of gnuchess works? How does the
program evaluate the each ply? I want to understand the how the gnuchess
gets the score (column of Eval) in the following form. Could you tell me
where I could find the information about all these parameters, like what is
the meaning of "Pawn=64%" ? Thank you very much! I appreciate it!
Root = -10, Phase = 1 Depth = 6
Ply Time Eval Nodes Principal-Variation
1. 0.00 62 20 e4
2& 0.00 -10 60 e4 e5
2. 0.00 -10 133 e4 e5
3& 0.00 34 397 e4 d5 Nc3 dxe4 Nxe4
3& 0.00 41 553 d4 d5 Nf3
3. 0.00 41 631 d4 d5 Nf3
4& 0.00 -10 872 d4 d5 Nf3 Nf6
4& 0.01 -3 2217 e4 Nf6 Nc3 d5 exd5 Nxd5
4. 0.01 -3 2583 e4 Nf6 Nc3
5& 0.03 -10 7612 e4 d5 exd5 Qxd5 Nc3 Qe5+ Be2
5& 0.04 13 9514 d3 d5 Nc3 Nf6 Nf3
5& 0.04 40 12761 d4 d5 Nf3 Nf6 Nc3
5. 0.05 40 14715 d4 d5 Nf3 Nf6 Nc3
6& 0.07 -10 19152 d4 d5 Nf3 Nf6 Nc3 Nc6
6& 0.16 -9 48987 e4 Nc6 d4 Nf6 d5
6. 0.16 -9 48987 e4 Nc6 d4 Nf6 d5
Time = 0.2 Rate=297245 Nodes=[44779/4208/48987] GenCnt=49817
Eval=[15547/21899] RptCnt=0 NullCut=1313 FutlCut=3679
Ext: Chk=813 Recap=169 Pawn=269 OneRep=30 Horz=12 Mate=0 KThrt=35
Material=[3600/3600 : 4400/4400] Lazy=[191/186] MaxPosnScore=[274/238]
Hash: Success=20% Collision=87% Pawn=64%
Have a nice day!
Best wishes,
Sincerely,
Chendong
___________
Computer Science Department
Texas Tech University
806.742.3513
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