Author: John Merlino
Date: 08:41:59 05/20/04
Go up one level in this thread
On May 20, 2004 at 10:06:36, Will Singleton wrote: >Sometimes Crafty gives me a headache. I was sitting there, minding my own >business, when all of a sudden pow! and Crafty wins another one. Must be >something to this smp business. > >Anyway, on ICC Crafty runs on a 2x 2.8ghz xeon. It found Rxg6 in about a >minute, if you count my thinking time plus its thinking time (assuming it >pondered correctly, which it probably did). If I run the same position on my p4 >2.8ghz, it takes Crafty 4:44 to find the move. I suppose the hash could affect >things, but that's still quite a speedup. > >Here's the position. Finding Rxg6 probably depends in large part on >king-safety, since Amateur likes it fairly quickly (p4 2.8ghz): > >[d]2rq1r1k/1pp1bp2/p5pp/1n1Pp3/2B1N3/4PP2/PPQ2PRP/6RK w - - > >10 -28 283 1103649 Qb3 Nd6 Bd3 Nxe4 >11 -23 452 1839082 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 f4 Bc5 Bc2 Qd6 f5 Rg8 fxg6 fxg6 >12 -14 889 3652804 Qb3 Nd6 Bd3 Bh4 >13 -9 1572 6584263 Qb3 Nd6 Bd3 Nxe4 fxe4 Rb8 Qc3 Qd6 Rc1 Rc8 f4 Bf6 Qc5 Qd7 >14 -5 4219 17715012 Qb3 Nd6 Bd3 Ra8 Nxd6 Qxd6 Qc3 Rd8 e4 >14 6 6427 26545535 Rxg6 fxg6 Rxg6 Rf5 CM_SKR on a P4-2.4 finds Rxg6 in six seconds: Time Depth Score Positions Moves 0:00 1/4 0.38 10232 1.a3 c6 2.Rd1 cxd5 3.Rxd5 0:00 1/4 0.98 13825 1.f4 exf4 2.Bxb5 axb5 3.Qc3+ Kg8 4.Rd1 0:00 1/5 0.80 24285 1.f4 exf4 2.Bxb5 axb5 3.Qc3+ Kg8 4.Rd1 c6 0:00 1/6 0.80 89330 1.f4 exf4 2.Bxb5 axb5 3.Qc3+ Kh7 4.Rd1 f5 0:01 1/7 0.35 229061 1.f4 c6 2.dxc6 Rxc6 3.Qb3 exf4 4.Bxf7 0:02 1/7 0.50 302208 1.Bxb5 axb5 2.Rd1 Ra8 3.Qc3 Rxa2 4.Qxe5+ f6 5.Qc3 Kg7 0:05 1/8 0.28 880225 1.Bxb5 axb5 2.Rd1 Kh7 3.Rgg1 Ra8 4.d6 cxd6 5.Qb3 Kg7 6.Qxb5 Rxa2 7.Qxb7 0:06 1/8 0.57 1056360 1.Rxg6 fxg6 2.Rxg6 Rf5 3.a4 Na7 4.Rxh6+ Kg7 5.Ng3 Kxh6 6.Qxf5 Bf6 7.Qh5+ Kg7 0:14 1/9 0.74 2653062 1.Rxg6 fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 b5 6.Bf1 Rc1 0:25 1/10 0.76 5113799 1.Rxg6 fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 Rg8 6.h4 b5 7.Bd3 Rc1+ 8.Kh2 0:57 1/11 0.72 12263493 1.Rxg6 fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 Rg8 6.f4 b5 7.Bf1 Rc1 8.Qd3 2:36 1/12 0.83 34523945 1.Rxg6 fxg6 2.Rxg6 Nd6 3.Nxd6 Qxd6 4.Rxd6 cxd6 5.Qe4 Rg8 6.h3 Rg7 7.f4 b5 8.Bd3 Rc1+ 9.Kh2 jm
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