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about gnuchess
From: |
Li, Chendong |
Subject: |
about gnuchess |
Date: |
Wed, 9 Jul 2008 15:49:30 -0500 |
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
- about gnuchess,
Li, Chendong <=