Search found 337 matches

by brianr
Fri Aug 17, 2007 8:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Opening / Middle game
Replies: 3
Views: 2062

Re: Opening / Middle game

Please keep in mind that book development is done both with and without "engine" integration. Either way, there is a lot of art and science in developing good books. Morevoer, it might be non-trival to even define an "opening move" (GUI only, GUI/Engine integration with "limited" searching, engine b...
by brianr
Thu Aug 16, 2007 2:37 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: nondeterministic testing
Replies: 86
Views: 33177

Re: nondeterministic testing

I use a hierarchy of tests, that have been very slowly evolving from more to less ad-hoc. There are about a half dozen hard coded test positions in Tinker covering various game stages that over the years I have become familiar with and can see if something odd seems to be happening. I also do a "mir...
by brianr
Mon Jul 30, 2007 4:02 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Going crazy over Glaurung...
Replies: 14
Views: 7350

Re: Going crazy over Glaurung...

Also note that Glaurung does some potentially significant evaluation scaling right at the end. In particular, beyond the midgame and endgame phase scaling it finally does this: const int GrainSize = 4; ... return Value(int(result) & ~(GrainSize - 1)); This may tend to minimize th...
by brianr
Thu May 17, 2007 11:15 pm
Forum: Computer Chess Club: General Topics
Topic: Fixed depth games/tournaments
Replies: 2
Views: 1414

Re: Fixed depth games/tournaments

Engines often count depth (or ply) very differently, making it a practical impossibility to run an "equal" depth match.

To account for speed differences, some testers adjust the search times instead.
by brianr
Wed May 16, 2007 1:53 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: a beat b,b beat c,c beat a question
Replies: 9
Views: 6505

Re: a beat b,b beat c,c beat a question

Firstly, I think you are already in pretty good shape if in fact you can actually test two versions of your program to the extent that you see a "significant score" difference. More importantly, many have said testing an engine against itself may highlight differences that testing an engine against ...
by brianr
Wed May 09, 2007 2:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Faster EGTB File Open Times
Replies: 0
Views: 1936

Faster EGTB File Open Times

There have been some posts about this before, but I thought it might be helpful to post something that I noticed recently. This is for Windows XP. Tinker uses about 80GB of EGTB files with all 3/4/5 and about 70GB of 6 men files. The time to open only the 3/4/5 men EGTB files was longer the first ti...
by brianr
Wed Apr 18, 2007 8:17 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Who will win the Hammer of Thor Open? 7 Round Swiss
Replies: 9
Views: 4238

Re: Who will win the Hammer of Thor Open? 7 Round Swiss

That which does not kill Tinker only makes it stronger!

Actually, I had no idea which other engines would be in this round.
:shock: