Author: Thomas Lagershausen
Date: 14:21:30 01/15/01
Go up one level in this thread
On January 15, 2001 at 16:27:38, Thomas Lagershausen wrote: >On January 15, 2001 at 07:05:54, Mogens Larsen wrote: > >>On January 15, 2001 at 06:22:35, Thomas Lagershausen wrote: >> >>>>[D]1r2k1r1/3p1p2/2bR1Bp1/p1K1P2p/5P1P/1P6/3R4/8 w - - 0 32 >>> >>>It is now clear that two moves earlier the move 30.a5 is the winner. >>>Black has no good alternative defense. >>>For example 31...Ra6 32.Ra2 Ra7 33.b4 a4 34.b5 Ra5 35.Rxc6 dxc6 36.Rd2 Ra8 >>>37.bxc6 and winning. Or 31...Rc8 and 32.Kb6! wins clear. >>>So the real question is:"Wins a program with the white pieces after the 29th >>>move by black? We know 30.a5! is a winner. >> >>I gave Gandalf a chance on my Athlon 800 with 56Mb hash. >> >>Analysis by Gandalf 4.32g: >> >>30.Kc3 b5 >> = (0.09) Depth: 2 00:00:00 >>30.Kc3 b5 31.axb5 Bxb5 >> = (-0.01) Depth: 3 00:00:00 >>30.Rd1 >> = (0.01) Depth: 3 00:00:00 >>30.Rd1 >> = (0.01) Depth: 4 00:00:00 >>30.Rd1 >> = (0.01) Depth: 5 00:00:00 2kN >>30.Kc3 >> = (0.03) Depth: 5 00:00:00 2kN >>30.Kc3 b5 31.axb5 Bxb5 32.R2d5 Rc8 >> = (0.11) Depth: 5 00:00:00 2kN >>30.Kc3 Rb8 31.Kc2 Be4+ 32.Kb2 Rb7 33.Rd1 >> = (0.11) Depth: 6 00:00:00 25kN >>30.Kc3 Rf8 31.Kb2 Rg8 32.Kc1 b5 33.axb5 Bxb5 >> = (0.08) Depth: 7 00:00:00 79kN >>30.Kc3 Rf8 31.Kd3 Rg8 32.Kc4 Rc8 33.Rd1 Ra8 >> = (0.16) Depth: 8 00:00:01 232kN >>30.Kc3 Rf8 31.Kd3 Rg8 32.Kc4 Rb8 33.Kc3 Ra8 34.Kc4 >> = (0.16) Depth: 9 00:00:01 323kN >>30.Kc3 Rf8 31.Kc2 Rg8 32.Kb2 Rf8 33.Kc3 b5 34.axb5 >> = (0.14) Depth: 10 00:00:04 874kN >>30.Kc3 Rf8 31.Kc2 Rg8 32.Kb2 Rf8 33.Kc3 Rg8 34.Kc4 >> = (0.14) Depth: 11 00:00:06 1362kN >>30.Kc3 Rf8 31.Kc2 Rg8 32.Kb2 Rf8 33.Kc3 Rg8 34.Kc4 >> = (0.14) Depth: 12 00:00:08 2016kN >>30.Kc3 Rf8 31.Kc2 Rg8 32.Kb2 Rf8 33.Kc3 Rg8 34.Kc4 Rc8 >> = (0.14) Depth: 13 00:00:15 3621kN >>30.Kc3 Rf8 31.Rc2 Rg8 32.Kd3 Ra5 33.Ke3 Rf8 34.Rcd2 Ra8 >> = (0.12) Depth: 14 00:01:03 14559kN >>30.a5 >> = (0.14) Depth: 14 00:02:02 14559kN >>30.a5 bxa5 31.Kxc5 Ra6 32.Ra2 Ra7 33.b4 a4 34.Rad2 Be4 >> = (0.24) Depth: 14 00:02:21 14559kN >>30.a5 bxa5 31.Kxc5 Rb8 32.Rxc6 dxc6 33.Kxc6 Kf8 34.Kc7 Ra8 >> ² (0.46) Depth: 15 00:07:16 87829kN >>30.a5 bxa5 31.Kxc5 Ra6 32.Ra2 Ra8 33.Kc4 Be4 34.b4 a4 >> ² (0.57) Depth: 16 00:13:23 163041kN >> >>Regards, >>Mogens > >Wow.Maybe Gandalf beets every other program in this position? > >I had only time to testing Rebel Century 3. >Rebel needs 4 hours 28 minutes and 29 sec. to see 30.a5! >CPU: K6-2+ 600 Mhz ply 16 Variation 9 score only +0,24 >Rebel shows only 30.a5 ba5: 31.Ra2?! Bb7 >I think now we have a difficult position for computers. Now i had time to test Nimzo 7.32 (K6-2+ 600Mhz - 184MB Hash) At ply 17 it plays 30.a5! Time: 15 Min. 06 sec. later with the complete solution. Is Nimzo 8 better? Dömges - Lagershausen r3k1r1/3p1p2/1pbR1Bp1/2p1P2p/P1K2P1P/1P6/3R4/8 w - - 0 1 Analysis by Nimzo 7.32: 30.a5 -+ (-1.78) Tiefe: 1/11 00:00:02 30.f5 -+ (-1.68) Tiefe: 1/11 00:00:02 30.f5 -+ (-1.68) Tiefe: 1/11 00:00:03 30.Lg5 µ (-0.87) Tiefe: 1/11 00:00:03 30.Lg5 µ (-0.87) Tiefe: 1/11 00:00:03 30.T6d3 µ (-0.75) Tiefe: 1/11 00:00:03 30.T6d3 µ (-0.75) Tiefe: 1/11 00:00:03 30.T2d3 ³ (-0.56) Tiefe: 1/11 00:00:03 30.T2d3 ³ (-0.56) Tiefe: 1/11 00:00:03 30.Td1 = (0.00) Tiefe: 1/11 00:00:03 30.Td1 = (0.00) Tiefe: 3/14 00:00:03 30.Td1 = (0.00) Tiefe: 5/17 00:00:03 30.Td1 = (0.00) Tiefe: 6/19 00:00:03 30.Td1 = (0.00) Tiefe: 7/20 00:00:03 30.Td1 = (0.00) Tiefe: 8/22 00:00:03 30.Td1 = (0.00) Tiefe: 9/23 00:00:03 30.Td1 = (0.00) Tiefe: 10/25 00:00:04 245kN 30.Td1 = (0.00) Tiefe: 11/26 00:00:04 245kN 30.Td1 = (0.00) Tiefe: 12/28 00:00:06 1115kN 30.Td1 = (0.00) Tiefe: 13/29 00:00:10 2882kN 30.Td1 = (0.00) Tiefe: 14/31 00:00:19 6896kN 30.Td1 = (0.00) Tiefe: 15/32 00:00:40 18285kN 30.Td1 = (0.00) Tiefe: 16/34 00:01:29 43412kN 30.Td1 = (0.00) Tiefe: 17/35 00:03:27 105441kN 30.a5 = (0.01) Tiefe: 17/35 00:15:06 466549kN 30.a5 bxa5 31.Kxc5 Tb8 32.Txc6 dxc6 33.Kxc6 Kf8 34.Td5 Tb5 35.Txb5 ² (0.59) Tiefe: 17/35 00:24:25 757120kN Thomas
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