Author: Heiner Marxen
Date: 08:23:05 03/25/03
Go up one level in this thread
On March 24, 2003 at 16:34:16, John Merlino wrote: >On March 24, 2003 at 15:57:55, Art Basham wrote: > >>Here is a neat position... >>1. Qe5 wins..! >> >>[D]5k2/3q1rpB/4Q2p/p7/1p1pR2P/1Pb3P1/P4P2/6K1 w - - 0 1 >> >>Maybe there is a program that announces mate at move 1...! > >It takes Chessmaster 9000 four seconds on a P3-750 to announce Mate in 8: > >Time Depth Score Positions Moves >0:00 1/3 0.56 2410 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 >0:00 1/4 1.52 4299 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 > 4.Bg6+ Kd7 >0:00 1/5 8.88 12505 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 > 4.Qc6+ Qd7 5.Bg6+ Rf7 6.Qxd7+ Kxd7 > 7.Rxf7+ Kd6 8.Rxg7 >0:00 1/6 8.88 34191 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 > 4.Qc6+ Qd7 5.Bg6+ Rf7 6.Qxd7+ Kxd7 > 7.Rxf7+ Kd6 8.Rxg7 >0:00 1/7 8.88 64472 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 > 4.Qc6+ Qd7 5.Bg6+ Rf7 6.Qxd7+ Kxd7 > 7.Rxf7+ Kd6 8.Rxg7 >0:01 1/8 12.15 187581 1.Qe5 Qd8 2.Qc5+ Re7 3.Rf4+ Ke8 > 4.Qb5+ Qd7 5.Bg6+ Rf7 6.Re4+ Kd8 > 7.Qb8+ Qc8 8.Re8+ Kxe8 9.Qxc8+ > Ke7 10.Qc7+ Ke6 11.Qxf7+ Kd6 12.Qxg7 >0:04 1/9 Mate08 523484 1.Qe5 Qd8 2.Qc5+ Re7 3.Bg6 Qe8 > 4.Qf5+ Kg8 5.Rxe7 Qxe7 6.Qd5+ Kf8 > 7.Qa8+ Qe8 8.Qxe8# >0:06 2/10 Mate08 837712 1.Qe5 Qd8 2.Qc5+ Re7 3.Bg6 Qe8 > 4.Qf5+ Kg8 5.Rxe7 Qxe7 6.Qd5+ Kf8 > 7.Qa8+ Qe8 8.Qxe8# > >jm Chest confirms that (Athlon 1500+, 135 secs). 1.Qe5 is the only solution: PV: Qe5 Re7 Rf4+ Rf7 Qb8+ Qe8 Qd6+ Qe7 Rxf7+ Kxf7 Bg6+ Kf8 Qb8+ Qe8 Qxe8# Cheers, Heiner
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