Author: Heiner Marxen
Date: 05:59:10 02/06/01
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On February 06, 2001 at 06:21:32, leonid wrote: >Hi! > >If you like to solve forced mate... > >[D]BKB4R/R1R5/6r1/B3bbr1/4bbb1/1R1bbbb1/3b4/6k1 b - - > >Please say your result. >Leonid. Huh, for this one Chest finds 6 different solutions in 7 moves: Bxa5 Rb1+ Bxb1 Rh1+ Bxh1 Bc6 Bexc7+ Ka8 Bxc6+ Rb7 Bxb7+ Bxb7 Rg8# Bxa8 Rab7 Bxc7+ Bxc7 Baxb7 Rb1+ Bxb1 Rh1+ Bxh1 Bxb7 Bxc7+ Ka8 Rg8# Bxc7+ Bxc7 Bxa7+ Kxa7 Bde3+ Rb6 Rxb6 Bc6 Rxc6+ Bb6 Bb8+ Ka8 Rxc8# Bxc8 Bc6 Bxc7+ Bxc7 Bxa7+ Ka8 Bxc6+ Kxa7 Bde3+ Rb6 Ra5+ Kb8 Bxc7# Bxh8 Bab7 Bxc7+ Bxc7 Bxc7+ Ka8 Bxb7+ Rbxb7 B5e4 Bf5 Bxb7+ Rxb7 Ra6# Rg8 Bb6 Bxc7+ Bxc7 Rxh8 Ra1+ Bde1 Rxe1+ Bxe1 Bb7 Bxc7+ Ka8 Rxc8# 7.7 minutes K7/600 60MB hash. In the last depth there was sort of an explosion: # 1 0.00 0.87 1- 0 # 2 0.00 1.00 1- 0 # 3 0.01 0.97 57- 0 # 4 0.10 1.07 599- 0 # 5 0.78 1.19 4747- 0 # 6 9.84 1.33 58492- 0 # 7 456.38 1.67 2705767- 1136381 (depth seconds speed nodes in nodes out) I have not yet tried with side to move switched ;-) Heiner
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