Author: Heiner Marxen
Date: 06:02:31 01/27/02
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On January 26, 2002 at 07:11:47, leonid wrote: >Hi! > >This position is one between few hundereds that was created long time ago (June >2001) and never came here. Mate is very moderate and it will take not big effort >to solve it. > >[D]1q1kq1q1/qQrbbrQq/3QQ3/NqQqqQqN/8/BnR2RnB/3PP3/3K4 w - - > >Please indicate your result. > >Thanks, >Leonid. Since black is threatening Qgxd2# the search tree is small. Chest on an Athlon 1500+ needs just 154 second (2.6 minutes) to find a unique solution for mate in 9 (128 MB hash): PV: Qdxe7+ Qexe7 Qcxe7+ Qxe7 Bxe7+ Rxe7 Qff8+ Qxf8 Rxf8+ Re8 Rxe8+ Bxe8 Qec8+ Qxc8 Qxc8+ Rxc8 Rxc8# Timing and EBF: # 3 0.01s 1kN [ 13.35] 0.95 94- 0 # 4 0.06s [ 6.00] 10kN [ 7.28] 1.16 420- 0 # 5 0.33s [ 5.50] 56kN [ 5.63] 1.49 2267- 0 # 6 1.59s [ 4.82] 264kN [ 4.72] 1.94 11724- 0 # 7 6.92s [ 4.35] 1115kN [ 4.23] 2.56 57089- 0 # 8 30.50s [ 4.41] 4626kN [ 4.15] 3.26 268493- 0 # 9 154.58s [ 5.07] 22281kN [ 4.82] 3.86 1582341- 4173 Cheers, Heiner
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