Author: Robert Hyatt
Date: 21:09:04 07/23/02
Go up one level in this thread
On July 23, 2002 at 22:26:40, Anson T J wrote: >On July 23, 2002 at 22:21:38, Dann Corbit wrote: > >>On July 23, 2002 at 22:13:35, Anson T J wrote: >> >>>New position >>>[d]r1b1r1k1/1q3ppp/ppn5/2bNp3/P4B2/5Q1P/BP3PP1/R2R2K1 w - - 0 1 >>> >>>Analysis by Shredder 6.02: >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 e4 4.Qg3+ Bg4 5.Qxg4+ Kh8 6.Bxf8 Rxf8 7.Qxe4 Rfe8 >>>8.Bxc6 Qxc6 >>> ³ (-0.48) Depth: 11/22 00:00:34 12383kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 e4 4.Qg3+ Bg7 5.Bxg7 Nd4 6.Bxb7 Ne2+ 7.Kh2 Re6 >>> = (-0.13) Depth: 11/22 00:00:36 13345kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Qxf6 Re6 5.Bxe6 Bxe6 6.Ra3 Ne7 7.Bxf8 Rxf8 >>>8.Rg3+ Ng6 9.Qxe5 >>> = (0.14) Depth: 11/22 00:00:49 18628kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Qxf6 Re6 5.Bxe6 Bxe6 6.Qg5+ Kh8 7.Rd8 Rxd8 >>>8.Bxf8 f6 9.Qxf6+ Kg8 10.Ba3 Bf7 >>> = (0.09) Depth: 12/24 00:01:18 29771kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Re6 5.Bxf8 Rxf8 6.Qg4+ Kh8 7.Rg3 e4 8.Bxe4 >>>Re7 9.Qg7# >>> ² (0.34) Depth: 13/26 00:02:37 60529kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Bxh6 5.Qxf6 Bf5 6.Bxc6 Bg7 7.Rg3 Bg6 >>>8.Qxg7+ Kxg7 9.Bxb7 b5 10.Bxa8 >>> ² (0.67) Depth: 13/26 00:03:09 73323kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Bxh6 5.Qxf6 Bf5 6.Bxc6 Bg7 7.Bxb7 Bxf6 >>>8.Bxa8 Rxa8 9.Rf3 Bc2 10.Rd2 >>> ± (0.92) Depth: 14/28 00:05:56 139257kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Bxh6 5.Qxf6 Bf5 6.Bxc6 Bg7 7.Bxb7 Bxf6 >>>8.Bxa8 Rxa8 9.Rf3 Bxh3 10.Rxf6 Be6 >>> +- (1.42) Depth: 14/28 00:07:46 181222kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Bxh6 5.Qxf6 Re6 6.Bxe6 Bxe6 7.Rg3+ Kf8 >>>8.Qxh6+ Ke7 9.Qh4+ Kf8 10.Qxh7 Ke7 11.Qh4+ Kf8 12.Qf6 >>> +- (2.04) Depth: 14/28 00:10:33 246316kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bd7 4.Ra3 Bxh6 5.Qxf6 Bf5 6.Bxc6 Bg7 7.Bxb7 Bxf6 >>>8.Bxa8 Rxa8 9.Rf3 Bxh3 10.Rxf6 >>> +- (2.05) Depth: 15/30 00:17:30 408062kN >>>1.Nf6+ gxf6 2.Bh6 Bf8 3.Bd5 Bxh6 4.Bxc6 Qe7 5.Bxe8 Rb8 6.Bc6 f5 7.Re1 Bg7 8.Rac1 >>> +- (2.28) Depth: 16/32 00:42:31 993322kN >>> >>>At depth 16, shredder prefers Nf6+ gxf6 Bh6 Bf8 Bd5 *Bxh6* >> >>Perhaps an indication of why Shredder wins so many championships. On the tough >>positions, it's smarter than the average bear. >> >>What sort of hardware do you have, and how much hash did you allocate? > >Dual PIII 700MHz (Clocked at 933MHz) 256 MB Hash > >I think the 256 hash is only good for 1-2 mins of searching though wish i had >more ram. > >I agree with you, Shredder is very impressive. Yes it is very good. For some rough comparisons, DB Jr had 16 chess processors at 2M nodes per second each. Roughly 32M nodes per second. But then Hsu claimed about 30% efficiency so make that 9M nodes per second. They took about 2 minutes to find the +2.5 score (I am trying to locate this old email to get the exact output and time but I only have about a million emails I have sent over the past 7+ years so finding that one is non-trivial). In any case, you can probably compare them at 9M nodes per second times 120 seconds, vs Shredder at whatever time it took... One thing is to see if Shredder has found _the_ line yet. IE the line played in the game was optimal. DB Jr had every move right for about 10 moves until the PV ran out due to the hardware... so it saw what was really going to happen pretty well...
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