Author: Jeremiah Penery
Date: 20:22:04 05/22/99
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On May 22, 1999 at 04:34:48, Dave Gomboc wrote: >On May 21, 1999 at 21:40:57, Dave Gomboc wrote: > >>First, the (famous) game. >> >>Glucksberg - Najdorf, Warsaw 1935. >> >>1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 f5 5.Nf3 Nf6 6.Bd3 Bd6 7.O-O O-O 8.Ne2 Nbd7 9.Ng5 >>Bxh2+ 10.Kh1 Ng4 11.f4 Qe8 12.g3 Qh5 13.Kg2 Bg1 14.Nxg1 Qh2+ 15.Kf3 e5 16.dxe5 >>Ndxe5+ 17.fxe5 Nxe5+ 18.Kf4 Ng6+ 19.Kf3 f4 20.exf4 Bg4+ 21.Kxg4 Ne5+ 22.fxe5 h5# >> >>Now for the questions: >> >>How long does it take for programs to... >> >>1) decide to play 15...e5! >> >>2) assess 15...e5! as about +4 for Black (roughly the score if White had played >>21.Ke3 and dropped his queen. The interpolation of 16.cxd5 cxd5 doesn't >>substantially change matters.) >> >>3) decide to play 13...Bg1! (it's better than ...Bxg3) >> >>4) assess 13...Bg1! as about +2 for Black (up two pawns). >> >>Dave > >I just went for "the big enchilada" and skipped over 1 and 2 for now. I cleared >out position.bin and position.lrn, and set Crafty thinking on Black's 13th move. > Here's what I get on my dual PII-300: <snip> >An hour was long enough, the hash table was probably swamped. I will try to >double it in size to 96M and run it overnight. > >Dave Ack! Sorry for the duplicate post - I accidentally submitted before typing. :P Anyway, the hash table was certainly full by then, but a full hash table doesn't seem to hurt Crafty in any noticeable way, like it hurts Fritz, for example. I run with only 12MB hash, even for overnight analyses, and the results are almost identical when I run with larger hashes. Jeremiah
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