Search found 18624 matches

by hgm
Tue Apr 17, 2007 8:53 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Material imbalance evaluation
Replies: 10
Views: 14976

Re: Material imbalance evaluation

I just did an interesting experiment in uMax concerning piece values. The standard version always used the 'classical' values 1,3,3,5,9. As uMax fails to correct for piece-square points of the captured piece, this makes trades of B vs N, B or N vs 3P, 2B vs R+P completely equal, and therefore often ...
by hgm
Mon Apr 16, 2007 10:26 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Material imbalance evaluation
Replies: 10
Views: 14976

Re: Material imbalance evaluation

I would be afraid that such an evaluation is very prone to systematic errors. For example, if you look at win prercentage of games where a Knight was sacrificed for two Pawns, you might conclude that the Pawns have a pretty good chance. But this would most likely be caused because these two Pawns wo...
by hgm
Sun Apr 15, 2007 4:50 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Test versions / private versions wanted for testing purposes
Replies: 20
Views: 22790

Re: Test ... / private versions ... Why SMIRF is different

Well, you should have a look at SMIRF. That is, why I still hasitate to have a UCI version of SMIRF (as I had done with SmirfMateUCI for a short time). There are some problems with common protocols: a) no support for Chancellor and Archbishop (playing, promoting ...) b) no support for different cas...
by hgm
Sat Apr 14, 2007 2:07 pm
Forum: Computer Chess Club: General Topics
Topic: Windows Vista: 32-bit or 64-bit?
Replies: 15
Views: 10407

Re: Windows Vista: 32-bit or 64-bit?

Hmm, it seems they don't want to sell me this computer with a 64-bit system, as they are not sure that 64-bit drivers exist for the video card it comes with. Buying an 'a la carte' PC from them with a simpler video card but otherwise the same hardware specs, and 64-bit Vista Basic in stead of 32-bit...
by hgm
Sat Apr 14, 2007 9:38 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Enhanced Transposition Cutoff
Replies: 6
Views: 9506

Re: Enhanced Transposition Cutoff

All my engines use IID, and I guess that this is automatically upward compatible with ETC: as in any node the search (after static move ordering) starts at d=1 (i.e. the replies to all moves are searched to QS level), it probes the hash in the daughter nodes for any position that can be reached. If ...
by hgm
Sat Apr 14, 2007 8:00 am
Forum: Computer Chess Club: General Topics
Topic: Windows Vista: 32-bit or 64-bit?
Replies: 15
Views: 10407

Re: Windows Vista: 32-bit or 64-bit?

Well, this computer will basically only serve one purpose: run Chess programs (run test games for my engines, act as a server to play remote at OTB tournaments, build 7-men EGTBs). As such I am unlikely to ever buy any hardware extensions to it. So as long as the Windows Vista has drivers for the ha...
by hgm
Sat Apr 14, 2007 7:46 am
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Test versions / private versions wanted for testing purposes
Replies: 20
Views: 22790

Re: Protocols controlling the computerchess world ?

To get an impression of the real playing strength of SMIRF and also the both other 10x8 chess protagonits it would be helping to have a seriously performed test of SMIRF playing traditional chess. Well, this is exactly the point I tried to make. There are hundreds of engines out there to perform su...
by hgm
Sat Apr 14, 2007 7:26 am
Forum: Computer Chess Club: General Topics
Topic: Windows Vista: 32-bit or 64-bit?
Replies: 15
Views: 10407

Re: Windows Vista: 32-bit or 64-bit?

OK, thanks. I was afraid of this. Strange that they sell computers standard with an OS that is not suitable for it, and even advertize that they might not be able to deliver the 64-bit version...
by hgm
Sat Apr 14, 2007 6:36 am
Forum: Computer Chess Club: General Topics
Topic: Windows Vista: 32-bit or 64-bit?
Replies: 15
Views: 10407

Windows Vista: 32-bit or 64-bit?

I want to buy a new computer with Core 2 Duo CPU. But they seem to be sold with a 32-bit version of Vista in standard configuration. What does this mean? Will I not be able too run 64-bit applications on this machine under this OS? Or is it just that the kernel of the OS itself is running in 32-bit ...
by hgm
Fri Apr 13, 2007 9:26 pm
Forum: Computer Chess Club: Programming and Technical Discussions
Topic: Compiler switches
Replies: 16
Views: 19394

Re: Compiler switches

This is not entirely true. Some optimalizations at the higher optimization levels are 'unsafe', bcause they make certain assumptions that might not be fulfilled (e.g. that different pointers do not point to the same object, or that pointers will not get to point to simple variables, so that after p=...