Search found 1142 matches

by Gian-Carlo Pascutto
Sat Feb 28, 2009 10:30 am
Forum: Computer Chess Club: General Topics
Topic: An idea for a new WCCC format - what do you think?
Replies: 220
Views: 32818

Re: An idea for a new WCCC format - what do you think?

There are 2 strong points in favor of having a live tournament: a) It's easier to get sponsors and publicity. And hence, rewards both material and nonmaterial, for winning! b) It's human nature that the incentive to cheat is less if you are facing a person rather than in the anonymity of the interne...
by Gian-Carlo Pascutto
Sat Feb 28, 2009 10:11 am
Forum: Computer Chess Club: General Topics
Topic: An idea for a new WCCC format - what do you think?
Replies: 220
Views: 32818

Re: An idea for a new WCCC format - what do you think?

Is there some evidence to suggest that this is true. For example, a past CCT winner who you think did something like this? Formally, everything you can do in an internet tournament can also be done via remote play. Vas There were disputes about Junior and SearcherX in the past. And that's only thos...
by Gian-Carlo Pascutto
Sat Jan 31, 2009 9:18 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: parallel search (technical)
Replies: 18
Views: 2951

Re: parallel search (technical)

Can't you achieve what you want by requiring that the first node searched (which is always non-split) took at least x nodes before allowing a split?
by Gian-Carlo Pascutto
Sat Jan 31, 2009 9:15 am
Forum: Computer Chess Club: General Topics
Topic: Intel to detail eight-core Xeon processor
Replies: 8
Views: 1656

Re: Intel to detail eight-core Xeon processor

Sounds interesting ... personally I would really like to get my hands on an overclockable "Skulltrail" type platform for 2 x 8core Nehalems. Imagine 16 cores at 5ghz !!! I think after 16 cores the advantage of hardware for chess gets diminishing returns and thus a different method such as clusterin...
by Gian-Carlo Pascutto
Sat Jan 24, 2009 7:24 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP search stability
Replies: 2
Views: 828

Re: SMP search stability

Sounds absolutely normal and expected to me.
by Gian-Carlo Pascutto
Thu Jan 22, 2009 11:09 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: SMP and helpfull master concept
Replies: 12
Views: 2469

Re: SMP and helpfull master concept

My point was that I am willing to split _anywhere_. Sure you can, but that doesn't make that SMART :) Let me put it differently: your helpful master can go help the search for move 2 out of 20, or it can go help the search for move 20 out of 20. I'd rather have my master do the first than the latter.
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: 2469

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: 11156

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: 2915

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: 2469

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.