Author: John Merlino
Date: 13:58:34 11/26/02
Go up one level in this thread
On November 26, 2002 at 15:00:20, Art Basham wrote: >[D]rnb2rk1/ppqp1p1p/2p3pQ/8/8/3NN3/PPB2PPP/3RR1K1 w - - > >Here Fritz7 announced mate in 11, but it turns out to be only mate in about 7... > >White plays >1. Nf5...! It is a mate in 8, which Chessmaster 9000, on a P3-733, announces in three seconds: Time Depth Score Positions Moves 0:00 1/3 4.14 2498 1.Ng4 Qd6 2.Nc5 0:00 1/4 3.38 9942 1.Ng4 Qd8 2.Nc5 d6 0:00 1/5 9.50 41202 1.Ng4 Qd8 2.Nf4 f6 3.Rxd7 Qxd7 4.Bb3+ Qd5 5.Nxd5 0:00 1/6 9.72 65268 1.Ng4 Qd8 2.Nf4 f5 3.Rxd7 Qxd7 4.Bb3+ Qe6 5.Nxe6 Rf7 0:02 1/7 14.47 239303 1.Ng4 Qd6 2.Nc5 Qf4 3.Qxf4 d5 4.Nh6+ Kg7 5.Re7 0:03 1/7 Mate08 380009 1.Nf5 gxf5 2.Ne5 d5 3.Rd3 Qd6 4.Rg3+ Qg6 5.Nxg6 fxg6 6.Re7 Rf7 7.Re8+ Rf8 8.Rxf8# 0:05 1/8 Mate08 625769 1.Nf5 gxf5 2.Ne5 d5 3.Rd3 Qd6 4.Rg3+ Qg6 5.Nxg6 fxg6 6.Re7 Rf7 7.Re8+ Rf8 8.Qxf8# Also, and very important, Ng4 is also a mate in 8, so this is not a very good test position if you are looking for a single move. Here is what CM9000 says when you ask it to give you the two best moves: Time Depth Score Positions Moves 0:10 1/9 Mate08 1306153 1.Nf5 gxf5 2.Ne5 d5 3.Rd3 Qd6 4.Rg3+ Qg6 5.Nxg6 fxg6 6.Re7 Rf7 7.Re8+ Rf8 8.Qxf8# 0:13 1/9 Mate08 1616681 1.Ng4 Qd6 2.Nf4 Qxf4 3.Qxf4 d5 4.Nf6+ Kg7 5.Nh5+ gxh5 6.Qg5+ Kh8 7.Qh6 Kg8 8.Qxh7# jm
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