Search found 1367 matches

by diep
Sat May 26, 2007 7:27 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: question about symmertic evaluation
Replies: 37
Views: 25711

Re: question about symmertic evaluation

I found that my evaluation is not symmetric for white and black. one of the reason is that in some part of my evaluation I simply calculate score from white point of view and later divide by 8 now (14>>3)=1 and (-14>>3)=-2 so I can get a different number for white and black. My question is how do y...
by diep
Sat May 26, 2007 7:21 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Speedup with bitboards on 64-bit CPUs
Replies: 49
Views: 41580

Re: Speedup with bitboards on 64-bit CPUs

[This is far faster at a K7 than crafty at a 64 bits chip. Vincent Ofcourse, you can say anything you want because we have no way of testing Crafty against your engine. May be you and Hyatt should do a 100 game online match at ICC at a decent time control. The statement makes no sense. That implies...
by diep
Sat May 26, 2007 7:19 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An instructive problem
Replies: 15
Views: 10609

Re: An instructive problem

Buzz seems to see it. Not quite sure what makes it work but probably try check extensions, singular-reply extensions, and perhaps checks in qsearch. Also recapture extensions might work on this position. Some may even trigger extensions by some trojan-pattern and/or switch the eval in some take-car...
by diep
Sat May 26, 2007 7:17 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: An instructive problem
Replies: 15
Views: 10609

Re: An instructive problem

Ermintrude playing black, recently got itself into this position against a human player in a blitz game (6 seconds per move): [d] r1bqr1k1/pp2bpp1/5n1p/3p2N1/3B3P/2PB1Q2/PP3PP1/R4K1R b - - 1 15 Having declined playing hxg5 for some moves, ermintrude wrongly judged it was now safe to do so, and lost...
by diep
Sat May 26, 2007 7:03 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Software Optimization Guide for AMD Family 10h Processors
Replies: 8
Views: 6570

Re: Software Optimization Guide for AMD Family 10h Processor

Hi, Very dissappointing that K8L at least as it looks like from specs, let's hope they managed to improve other stuff than the 64 ==> 128 bits bus thing. The rest looks nearly 100% the same. Besides of course SSE4 support as well additionally it has a hardware instruction for popcount. That's what i...
by diep
Sat May 19, 2007 5:33 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Comments on Lisp
Replies: 15
Views: 12883

Re: Comments on Lisp

See: http://lispers.org/ You are living in the ancient past. Man you need a few courses to make up. C/C++ is a lot faster than LISP. It is easier to program in than LISP. It is not only easier & faster, it also is easier to debug than LISP. Too easy to forget a ( or a ) in lisp. It is better cross ...
by diep
Sat May 19, 2007 5:20 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Speedup with bitboards on 64-bit CPUs
Replies: 49
Views: 41580

Re: Speedup with bitboards on 64-bit CPUs

Telepath (bitboard) is slower than NoonianChess in NPS by about 2x using a 32 bit complier (g++) for both on a Core2Duo and an AMD 4400+. Both machines using a 32 bit version of windows. When I went to the newer version of MSVC, Telepath gained a 33% speedup and it still was a 32 bit compile runnin...