Search found 1146 matches

by Gian-Carlo Pascutto
Thu Jan 22, 2009 7:09 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP and helpfull master concept
Replies: 12
Views: 2636

Re: SMP and helpfull master concept

Another trick which you can try is to only allow the master to help in subtrees below its own splitpoint. Why the limit? I let the "master" help anywhere in the tree... IIRC this gave a small extra speedup on low numbers of CPUs at some point. I no longer do this, though. It will also save splitpoi...
by Gian-Carlo Pascutto
Thu Jan 22, 2009 7:02 am
Forum: Computer Chess Club: General Topics
Topic: Core i7 and chess
Replies: 63
Views: 11742

Re: Core i7 and chess

How then does non-chess software get a speedup on the Intel Core i7? I was reading of the claims of 1.7 to 3.5 speedup for commercial applications on the new RHEL 5.3 Presumably all those applications are not written specifically for the Intel Core i7 and have been out for years and years? 1) They ...
by Gian-Carlo Pascutto
Sun Jan 18, 2009 11:56 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: additions to the shannon algorithm?
Replies: 13
Views: 3097

Re: additions to the shannon algorithm?

Another very important thing is knowing which endgames are drawn.
by Gian-Carlo Pascutto
Sun Jan 18, 2009 11:54 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP and helpfull master concept
Replies: 12
Views: 2636

Re: SMP and helpfull master concept

Another trick which you can try is to only allow the master to help in subtrees below its own splitpoint.
by Gian-Carlo Pascutto
Fri Jan 16, 2009 7:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: additions to the shannon algorithm?
Replies: 13
Views: 3097

Re: additions to the shannon algorithm?

I'm surprised nobody mentions passed pawns
by Gian-Carlo Pascutto
Fri Jan 16, 2009 7:46 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP and helpfull master concept
Replies: 12
Views: 2636

Re: SMP and helpfull master concept

Yes. You don't want to do this if the subtrees below the splitpoint get too small.
by Gian-Carlo Pascutto
Fri Jan 16, 2009 7:44 pm
Forum: Computer Chess Club: General Topics
Topic: Core i7 and chess
Replies: 63
Views: 11742

Re: Core i7 and chess

Karmazen & Oliver wrote:
in chess HT 23 % up for this CPU. Yes, I write that I was thinking about this... in a previus post...

bye
Nodes per second speedup means NOTHING for actual playing strength, which will be clear if you actually read this thread.
by Gian-Carlo Pascutto
Sun Jan 11, 2009 7:19 pm
Forum: Computer Chess Club: General Topics
Topic: Core i7 and chess
Replies: 63
Views: 11742

Re: Core i7 and chess

------------------------------------------------------------------------------------------- Program Exe Processor GHz Threads Kn/s Time Hardware User ------------------------------------------------------------------------------------------- Crafty v22.8 64 bit i7 920 HT off @4.00GHz 4CPU 18072085 ...
by Gian-Carlo Pascutto
Sun Jan 11, 2009 6:59 pm
Forum: Computer Chess Club: General Topics
Topic: Core i7 and chess
Replies: 63
Views: 11742

Re: Core i7 and chess

I don't see any problem,because the chess engine should see the 8threads and use them like 8cores..and if you turn HT off then is it just a quad core cpu! So,i think the problem must be in Rybka! and i'am sure the core i7 is faster then a skulltrail for chess! I have used Toga ,because i have to us...
by Gian-Carlo Pascutto
Wed Jan 07, 2009 9:22 pm
Forum: Computer Chess Club: General Topics
Topic: ICGA WCCC prospects ...
Replies: 86
Views: 10017

Re: ICGA WCCC prospects ...

Also, I would to mention that uniform platform was not a problem at all, at the Chess960 computer world championships in Mainz, 2005-2008. Did anyone NOT join them because the hardware was limited?! I don't think so. It's a prove that it can be done, and the software competition is more meaningful ...