Author: Carsten Kossendey
Date: 07:22:45 01/25/98
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On January 25, 1998 at 01:11:03, Richard A. Fowell (fowell@netcom.com) wrote: >On January 24, 1998 at 22:26:15, Carsten Kossendey wrote: > >>On January 24, 1998 at 20:11:39, Jay Scott wrote: >> >>>Then I tried MacChess 4.0. Searching to depth 7 took it less >>>than one second and didn't give an accurate speed, so I went >>>to depth 9. It reported ~250K nps. From my experience, that's >>>at the lower end of its normal range--it's what you'd expect >>>in this position. >>> >>>Considering chip performance alone, I'd expect crafty to run >>>rather faster on a G3 Mac than on a PPro 200. > >The classic tradeoff in chess is - look at lots of positions >superficially? >Or look at fewer positions carefully? > >For instance, on my 7300/180: >- HIARCS 6.0 is in 22,000 nps range, >- Crafty 14.5 is in the 40,000 nps range, >- MacChess is in the 150,000 nps range. > >However, in terms of strength, >HIARCS > Crafty > MacChess (IMHO). I second that ... where would you rank Chessmaster? >As I understand it, HIARCS and Crafty probably just have much more >complex evaluation functions than MacChess. This was in the part of my post which you snipped ;) >It seems there is a large difference even between >Crafty 12.9 and Crafty 14.5 here - not so much in nps, >but in time to search to 9 ply - I'm getting a >factor of three in time, with 14.5 taking longer. [snip] >Here's my canonical "a3" at depth 9 test output for Crafty 14.5: [snip] > time: 51.80 cpu:100% mat:0 n:2155330 nps:41608 [snip] >Crafty 12.9, (which Carsten might have juiced up a little) under >the same conditions, takes much less time to search to depth 9, but >with fewer positions, and only slightly more nodes/second: [snip] > time: 17.13 cpu:100% mat:0 n:760250 nps:44381 I just tried the original DOS executable; it searches 849824 nodes, so I guess I hacked something here ;)
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