Author: Dann Corbit
Date: 12:44:39 05/02/05
Go up one level in this thread
On May 01, 2005 at 15:18:05, John Merlino wrote: >On May 01, 2005 at 12:35:59, chandler yergin wrote: > >>I think someone posted this position as 'the grind'? >> >>Shredder finds the Mate. >> >>[D]1rb3kr/p2q1ppp/1p1N4/3QPP2/8/8/P1P3PP/1R3R1K w >> >>.e6 Qc7 2.exf7+ Kf8 3.Rbe1 g6 4.fxg6 Be6 >> +- (5.66) Depth: 7/21 00:00:45 54kN >>1.e6 Qc7 2.exf7+ Kf8 3.Rbe1 Bb7 4.Re8+ Rxe8 5.fxe8Q# >> +- (6.16) Depth: 7/21 00:00:47 62kN >>1.e6 Qc7 2.exf7+ Kf8 3.Rbe1 Bd7 4.Qe5 Qd8 5.f6 g6 >> +- (6.44) Depth: 7/29 00:00:49 77kN >>1.e6 Qc7 2.exf7+ Kf8 3.Rbe1 Bd7 4.Qe5 Qd8 5.f6 Qe7 6.Qxe7# >> +- (6.69) Depth: 8/22 00:00:55 100kN > >See this thread: > >http://www.talkchess.com/forums/1/message.html?423252 > >As you can see, it is a mate in approximately 15 moves, and you are yet another >victim of Shredder's deceptive (or, as I like to put it, "totally wrong") PVs >and/or evals. Many programs will cough up a pound sign in the principal variation and yet not show a mate score. The depth of search above is 8 plies, and so these moves: ... 5.f6 Qe7 6.Qxe7# are obviously speculative. On the other hand, when a program does show a mate _score_ when there is no mate, that is clearly a bug.
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