Author: Drexel,Michael
Date: 09:14:53 08/10/03
Go up one level in this thread
On August 10, 2003 at 05:19:56, Uri Blass wrote: >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. hehe, isn't it somewhat weird to announce a mate in 58 if you dont 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. > I am talking about ordinary middlegame positions, not about endgames. Who cares about Bugs and wrong Mate announcements in Analysis mode? Chessbase obviously not. Michael >Uri
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