Crafty 22.4 is now available

[bob]

Two changes:

(1) pawn island evaluation term removed. Cluster testing with 32,000 games showed this to be worth +14 Elo to remove it.

(2) bug Dann found earlier has been fixed, but in a different way from what he had tried because the Malloc() need to be done by each individual thread for NUMA reasons... this should solve the problem of compiling with CPUS=4 or whatever, but running with < 4 threads, which is what would produce the segfault.

[krazyken]

Mac OS X intel 64bit binary available here.
icc-profiled and good for up to 8 CPUs.

[Peter Skinner]

New builds are on my site as well.

[gerold]

New builds are on my site as well.

Thanks again Robert and Peter..

Crafty 22.4 appears to be the strongest version of Crafty
so far.

Best to you,

Gerold.

[bob]

New builds are on my site as well.

Thanks again Robert and Peter..

Crafty 22.4 appears to be the strongest version of Crafty
so far.

Best to you,

Gerold.

some 500,000 games played this last week has helped a good bit. The cluster testing is actually working, and quite well... There is more to come...

[geots]

New builds are on my site as well.

Thank you very much, Bob and Pete- and all the rest who helped on this version.

Best Always,

George

[swami]

Thanks, Bob, Denis, Dann and Peter and others who helped!

[F.Huber]

New builds are on my site as well.

Any chance for a Crafty 22.4 build which is still working on old systems (Windows 98) and CPUs (Celeron)?

Even with new compilers this should only be a thing of setting some switches (like Win98-compatible, no SSE2/3 instructions ...).

[bob]

New builds are on my site as well.

Any chance for a Crafty 22.4 build which is still working on old systems (Windows 98) and CPUs (Celeron)?

Even with new compilers this should only be a thing of setting some switches (like Win98-compatible, no SSE2/3 instructions ...).

This is the reason I stopped offering executables years ago. There are so many architectures. And everyone wants the fastest version they can get for their specific machine. And intel has indeed given us a _lot_ of architectural variance over the years. The number might well be up to near 100 possible different executables today...

You would really do far better to get a good C compiler, learn how to compile Crafty, then play with the compiler options to produce the best speed you can. Then use that each time a new version comes out and you will always have the best that can be...

[Denis P. Mendoza]

Franz,

Every person needs to be given the opportunity to test this engine. Here's the all-purpose Crafty. Just choose which compile is better for you. I did 2 profiling using single and dual-core. I don't know if there's a difference. Anyway, I added a logo for remembrance and good luck !

http://computerchessengines.mylivepage. ... ileid=4005

Denis