Re: about gnuchess

[Guest]

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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