Search found 130 matches

by Codesquid
Wed Jun 19, 2013 10:01 pm
Forum: Computer Chess Club: General Topics
Topic: Octochess r5132 released
Replies: 4
Views: 1020

Octochess r5132 released

Hi all, a new version of Octochess has been released. This versions adds support for Multi-PV analysis mode. In addition, moves can now be excluded from analysis. There have been some bug fixes as well, mostly regarding endgame evaluation and subtle problems with enpassant captures. Last but not lea...
by Codesquid
Wed Jun 05, 2013 5:36 pm
Forum: Computer Chess Club: General Topics
Topic: Why most engines can't find this mate in 3 ?
Replies: 22
Views: 6468

Re: And why most engines can't find this draw ?

[d] 1R6/pPk1r3/2p5/K7/8/2B1b3/8/8 w - - 0 1 Ka6 draws, but almost no engine can find it... But if you move Ka6 by yourself and let the engine think after this, they will find a draw-score nearly instantly ! I really wonder why this happens. In particular Ka6 is found quickly if I let Octochess sear...
by Codesquid
Tue May 21, 2013 8:45 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: Sleeping Giants 4CPU
Replies: 56
Views: 4837

Re: Round 46 and Final Standings

Thanks for running this tournament. Looks like I've got some work to do :P
by Codesquid
Sun Apr 14, 2013 6:55 am
Forum: Computer Chess Club: General Topics
Topic: List of engines that can use 8 cores
Replies: 48
Views: 5218

Re: List of engines that can use 8 cores

Octochess can handle up to 64 cores.
by Codesquid
Mon Apr 08, 2013 5:39 pm
Forum: Computer Chess Club: General Topics
Topic: Interview with Don Dailey
Replies: 5
Views: 2642

Re: Interview with Don Dailey

Thanks, nice interview.
by Codesquid
Mon Apr 08, 2013 5:07 pm
Forum: Computer Chess Club: Tournaments and Matches
Topic: 40th Amateur Series Division 3
Replies: 27
Views: 2119

Re: Standings after Round 6 of 44

lucasart wrote:
lucasart wrote: I bet OctoChess will win this one, and DiscoCheck will be 2nd or 3rd.
I won my bet :D
Congratulations on your bet :)
by Codesquid
Fri Mar 29, 2013 8:15 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Repetition check
Replies: 20
Views: 2692

Re: Repetition check

bob wrote:We had this discussion last year. And the net result was that it is BETTER to leave repetition detection on through null-moves. I don't remember the exact Elo numbers, but I suppose one might be able to do a search to find the thread...
Interesting, will try this out.
by Codesquid
Fri Mar 29, 2013 8:10 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Strange results when TT's and quiescence are combined??
Replies: 7
Views: 1046

Re: Strange results when TT's and quiescence are combined??

Could the lack of check(mate) handling in your qsearch cause this?
by Codesquid
Fri Mar 29, 2013 11:12 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Repetition check
Replies: 20
Views: 2692

Re: Repetition check

Does Fairymax do nullmoves? Repetition information carried over from before the null move seems problematic.
by Codesquid
Sun Mar 24, 2013 8:26 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Magic bitboards: Cache issues and state of the art?
Replies: 9
Views: 2642

Re: Magic bitboards: Cache issues and state of the art?

My first question is: Is it worth the effort to try to pack the attack tables in fewer kilobytes? I guess processor cache sizes still limit the performance? Since the outcome of the magic move generation is symmetric with respect to the square index and occupation mask, I tried to half memory requi...