Author: Enrique Irazoqui
Date: 02:16:22 05/28/00
Go up one level in this thread
On May 27, 2000 at 19:04:35, Peter McKenzie wrote: >On May 27, 2000 at 15:12:29, Pete Galati wrote: > ><snip> >>[D]5k2/p1p4R/1pr5/3p1pP1/P2P1P2/2P2K2/8/8 w > >This position caught my eye because its from a famous Capablanca game. The key >move is Kg3! > >Out of curiosity i tried it on LambChop, and of course Chop initially prefered >Rd7, but at depth 14 it switched to Kg3 with a score of about +0.4. It took >about 15min on Pentium 133. > >How do other programs do on this position? > >cheers, >Peter Tiger finds Kg3 in 2 seconds with an evaluation that keeps climbing at every ply. F6a takes 69 seconds, Century 1.2 186 seconds, Shredder 4 291 seconds and CM6K sticks to Rd7 for more than 5 minutes. Enrique 5k2/p1p4R/1pr5/3p1pP1/P2P1P2/2P2K2/8/8 w - - 0 1 Analysis by Fritz 6a, P600E, 184MB hash: 1.Rxc7-- -+ (-1.84) Depth: 1/2 00:00:00 1.Rxc7-- Rxc7 -+ (-3.25) Depth: 1/3 00:00:00 1.c4! -+ (-2.28) Depth: 1/3 00:00:00 1.c4! Rxc4 ² (0.41) Depth: 1/3 00:00:00 1.Rh8+! ² (0.66) Depth: 1/4 00:00:00 1.Rh8+! Kg7 ± (0.94) Depth: 1/4 00:00:00 1.Rh8+-- ² (0.56) Depth: 2/7 00:00:00 1.Rh8+-- Kg7 2.Re8 Rxc3+ 3.Ke2 = (-0.06) Depth: 2/7 00:00:00 1.c4! ² (0.41) Depth: 2/7 00:00:00 1.c4-- = (0.06) Depth: 3/6 00:00:00 1.c4-- = (0.06) Depth: 3/9 00:00:00 1.g6! = (0.09) Depth: 3/9 00:00:00 1.g6! Rxg6 = (0.16) Depth: 3/9 00:00:00 1.Ke2! = (0.19) Depth: 3/9 00:00:00 1.Ke2! Rxc3 ² (0.34) Depth: 3/9 00:00:00 1.Ke2 Rxc3 2.Kd2 ² (0.34) Depth: 4/9 00:00:00 1kN 1.Rd7! ² (0.38) Depth: 4/12 00:00:00 2kN 1.Rd7! Rxc3+ 2.Ke2 Rc4 ² (0.63) Depth: 4/13 00:00:00 2kN 1.Rd7-- ² (0.31) Depth: 5/16 00:00:00 3kN 1.Rd7-- Rxc3+ 2.Ke2 Rc2+ 3.Kd3 Rf2 4.Ke3 = (0.16) Depth: 5/16 00:00:00 4kN 1.Ke2! = (0.19) Depth: 5/16 00:00:00 4kN 1.Ke2! Rxc3 ² (0.34) Depth: 5/16 00:00:00 5kN 1.Ke2 Rxc3 2.g6 Rc6 3.Rf7+ Ke8 4.Rxf5 Rxg6 5.Rxd5 = (0.16) Depth: 6/16 00:00:00 9kN 1.Rd7! = (0.19) Depth: 6/18 00:00:00 14kN 1.Rd7! Rxc3+ 2.Ke2 c5 3.dxc5 Rxc5 4.Rxa7 d4 ² (0.63) Depth: 6/18 00:00:00 18kN 1.Rd7 Rxc3+ 2.Ke2 Rc4 3.Rxd5 c6 4.Rxf5+ Kg7 5.Kd3 Rxa4 ² (0.59) Depth: 7/20 00:00:00 28kN 1.Rd7 Rxc3+ 2.Ke2 c5 3.dxc5 Rxc5 4.Rxa7 Rc4 5.Ke3 Re4+ ² (0.63) Depth: 8/22 00:00:00 64kN 1.Rd7 Rxc3+ 2.Ke2 c5 3.Rxd5 cxd4 4.Rxd4 Ke7 5.Rd5 Rc4 ² (0.69) Depth: 9/22 00:00:00 147kN 1.Rd7 Rxc3+ 2.Ke2 c5 3.Rxd5 cxd4 4.Rxd4 Ke7 5.Rd5 Ra3 ² (0.66) Depth: 10/26 00:00:00 276kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.66) Depth: 11/26 00:00:01 669kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.44) Depth: 12/30 00:00:02 1345kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.56) Depth: 13/30 00:00:05 2665kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.56) Depth: 14/33 00:00:10 5103kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.47) Depth: 15/32 00:00:23 11949kN 1.Rd7 Rxc3+ 2.Ke2 c6 3.Rxa7 Rc4 4.Kd3 c5 5.dxc5 bxc5 ² (0.47) Depth: 16/32 00:00:50 25808kN, tb=3 1.Kg3! ² (0.50) Depth: 16/33 00:01:09 34850kN, tb=3 1.Kg3 Rxc3+ 2.Kh4 Rc1 3.Kh5 Rd1 4.Rxc7 Rxd4 5.Rxa7 Rxf4 ± (0.72) Depth: 17/34 00:02:07 64390kN, tb=9 1.Kg3 Rxc3+ 2.Kh4 Rc1 3.Kh5 Rd1 4.Kg6 Rxd4 5.Kf6 Ke8 ² (0.69) Depth: 18/36 00:03:21 101264kN, tb=28 1.Kg3 Rxc3+ 2.Kh4 Rc1 3.Kh5 Rd1 4.Kg6 Rxd4 5.Rh8+ Ke7 ± (0.75) Depth: 19/36 00:06:03 182720kN, tb=142
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