Author: Peter Berger
Date: 13:17:22 11/28/03
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Subject: Junior - Crafty NPS Challenge - a user experiment -------------------------------------------------------------------------------- [ Post Followup (without quoting) ] [ Post Followup (with quoting) ] [ Computer Chess Resource Center ] [ Message Listing ] -------------------------------------------------------------------------------- Posted by Peter Berger (Profile) on November 21, 2003 at 16:47:52: Following recent heated discussions I'd love to do a little testmatch. There are different versions of the challenge online - I chose one that I can kind of simulate myself with slower hardware. Junior 8.0.0.2 will play on a P233MMX, 32 MB RAM. Crafty 19.4 will play on a PIV2.0GHz notebook, 1GHz RAM. Time control will be game in 2 hours with 10 seconds increment/move. The match will be done like older FIDE world championship matches - the first one to win 6 games wins the match, draws won't count. Junior uses 16MB Hash, 3+4 men tablebases, 1MB cache, junior8.ctg. Crafty uses 384MB Hash, 64MB hashp, 3+4 men tablebases, 32MB cache, own book, aware of playing a computer. Compairing setups with Crafty bench (hash 12M, hashp 3M, cache 1M on the slower one) suggests a speed difference factor of about 10.5 in raw nodes per seconds and 11.0 in "SMP time to-ply-measurement" between the two computers. As the Junior Mark doesn't work on the slower one and Junior chooses to search different depths on both in the starting position, I can't really give a number. The difference seems to be slightly lower for Junior though, sth like 9.0 maybe. Saying that the faster computer is about 10 times faster shouldn't be too wrong. That's also clearly an upper-bound for faster hardware Crafty could reasonably come up to compete with against a single-CPU opponent in a current competition on fast computers IMHO - the speedup demands 16 CPUs I guess, and I don't know if Crafty can really scale that well. With this setup Crafty should be the clear favourite I suppose. Crafty won the toss and will have the white pieces in the first game. Peter
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