Author: Heiner Marxen
Date: 13:03:16 01/20/02
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On January 19, 2002 at 17:40:05, David Rasmussen wrote: >This is from Shredder - Chezzz from the first day of CCT: > >[D]3Q4/4q2p/1p1pNk2/3P2p1/6P1/7P/5P2/6K1 w - - 0 50 > >The right move is Qh8+. Is there a shorter mate? > >00:00:41.44 15Mn 12/30/30 +MAT27 50. Qh8+ Kg6 51. Qg8+ Kf6 > 52. Qxg5+ Kf7 53. Qg7+ Ke8 > 54. Qg8+ Kd7 55. Qa8 Qf6 > 56. Qb7+ Ke8 57. Qc8+ Ke7 > 58. Qd8+ Kf7 59. Qf8+ > >This is probably easy, with all those forced moves... Verifying the shortest mate here is not exactly "easy": Chest on an Athlon 1500+ with 128MB hash (and some 4&5 piece EGTBs) needs 3.4 hours to find that Qh8+ is the unique key for a mate in 11: PV: Qh8+ Kg6 h4 gxh4 f4 h3 f5+ Kf7 g5 h2+ Kh1 b5 g6+ hxg6 f6 Qxe6 Qg7+ Ke8 dxe6 g5 Qg8# Cheers, Heiner
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