Author: Uri Blass
Date: 02:19:56 08/10/03
Go up one level in this thread
On August 10, 2003 at 04:23:56, Drexel,Michael wrote: >On August 09, 2003 at 20:45:47, John Merlino wrote: > >>On August 09, 2003 at 17:25:47, Vincent Lejeune wrote: >> >>>On August 09, 2003 at 15:38:47, Yar wrote: >>> >>>>On August 09, 2003 at 15:16:21, John Merlino wrote: >>>> >>>>>On August 09, 2003 at 15:05:39, Yar wrote: >>>>> >>>>>>Hello ! >>>>>> >>>>>>What is your engine says about this pos ? >>>>>>[D] r1r3kb/pp2pp2/1q1p1npB/6Q1/2nNPNP1/PP3P2/2P5/2KR3R b - - 0 20 >>>>>> >>>>>>Have a nice day >>>>>> >>>>>>Yar >>>>> >>>>>Not sure what the best move is, but Chessmaster 9000, on a P4-2.4, seems to >>>>>think that White has a winning position, and Black's best move is Qa5: >>>>> >>>>>Time Depth Score Positions Moves >>>>>0:00 1/3 -0.09 10262 20...Qa6 21.a4 Rc5 22.Nf5 >>>>>0:00 1/4 0.05 13991 20...Qa6 21.bxc4 Qxa3+ 22.Kb1 Rxc4 >>>>> 23.Qb5 >>>>>0:00 1/4 -0.04 15233 20...Ne5 21.Qh4 Qa5 22.Bg5 Qxa3+ >>>>> 23.Kb1 >>>>>0:00 1/5 -0.48 59871 20...Ne5 21.Kb1 Rc3 22.Nd5 Nxd5 >>>>> 23.exd5 >>>>>0:01 1/6 1.23 171470 20...Ne5 21.Bf8 Rxf8 22.Nf5 Nh5 >>>>> 23.Nxe7+ Kh7 24.Nxh5 >>>>>0:02 1/6 0.66 341051 20...Qa6 21.a4 Ne5 22.Qh4 Nxf3 >>>>> 23.Nxf3 Qc6 24.Rh2 Qxe4 >>>>>0:04 1/6 0.40 721414 20...Qc5 21.Qxc5 dxc5 22.Nde2 Ne5 >>>>> 23.g5 Nfd7 24.Nd5 >>>>>0:04 1/7 0.40 767801 20...Qc5 21.Qxc5 dxc5 22.Nde2 Ne5 >>>>> 23.g5 Nfd7 24.Nd5 >>>>>0:10 1/8 0.51 1681398 20...Qc5 21.Qxc5 dxc5 22.Nde2 Ne5 >>>>> 23.g5 Nfd7 24.Nd5 Re8 25.Rhf1 >>>>>0:27 1/8 0.43 4813745 20...Qa5 21.Qxa5 Nxa5 22.Nfe2 e5 >>>>> 23.Bd2 Rc5 24.b4 Rcc8 25.g5 Nc4 >>>>> 26.gxf6 exd4 >>>>>0:51 1/9 1.34 8887359 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>>>> 23.fxe4 Bf6 24.Qd5 e5 25.Nb5 Qb4+ >>>>> 26.c3 Qb2+ 27.Kd3 exf4 28.Qxb7 >>>>>4:05 1/10 1.56 43122326 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>>>> 23.fxe4 Bf6 24.Qd5 e5 25.Nb5 Qb4+ >>>>> 26.Kd3 exf4 27.Bxf4 Rc5 28.Qxb7 >>>>> Qxc4+ 29.Ke3 >>>>> >>>>>jm >>>>John, >>>> >>>>This is mate i wonder just how many moves ? >>> >>>The eval continue to rise, may be it will find the mate after some hours >>> >>>CM9000-SKR (Barton 2800+) >>> >>>Time Depth Score Positions Moves >>>0:33 1/9 0.90 8528166 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>> 23.fxe4 Bf6 24.Qd5 e5 25.Nb5 Qb4+ >>> 26.Ke2 exf4 27.Nxd6 >>>1:38 1/10 1.02 25344838 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>> 23.fxe4 Bf6 24.Qd5 e5 25.Nb5 Qb4+ >>> 26.Kd3 exf4 27.Bxf4 Rc5 28.Qxb7 >>> Qxc4+ 29.Ke3 >>>4:55 1/11 1.78 79407086 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>> 23.fxe4 Bxd4 24.Nd5 Re8 25.Nxe7+ >>> Rxe7 26.Qxe7 Qc3+ 27.Ke2 Qxc2+ >>> 28.Rd2 Qxc4+ 29.Rd3 Qb4 30.Bd2 Qb6 >>>22:43 1/12 2.18 377487007 20...Qa5 21.bxc4 Qxa3+ 22.Kd2 Nxe4+ >>> 23.fxe4 Bf6 24.Qd5 Qb4+ 25.c3 Qb2+ >>> 26.Kd3 Rc5 27.Rb1 Qa2 28.Ra1 Qb2 >> >>There may be some confusion. Yar seems to be claiming that Shredder stated that >>BLACK has the mate in 58 moves. At least, that's what I'm assuming because it is >>Black to move and Yar said "mate in 58". >> >>However, Chessmaster is saying that WHITE is winning (positive scores always >>favor White in the CM GUI). >> >>I am not at all convinced that Shredder's announcement of mate is accurate. In >>particular, I would like to see the PV (all 115 plies of it!). > >Of course you are right and it is not accurate. I saw this quite often in >Analysis mode. >#62,#68,... >This is just some flaw in the program. > >Michael I see no reason for programs who say mate in 58 to see everything. A program can say it when it knows based on its chess knowledge that it is mate in at most 58. For example a program may know that if the position is no stalemate and it has a queen and the opponent has only king then it is mate in at most 20 and claims mate in 20 even if it does not see a forced mate by search. I know of no program that does it but I see nothing wrong with doing it. Uri
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