Author: Heiner Marxen
Date: 08:29:23 02/14/00
Go up one level in this thread
On February 14, 2000 at 05:08:22, Andreas Stabel wrote: >On February 13, 2000 at 18:02:20, James T. Walker wrote: > >>On February 12, 2000 at 10:18:44, leonid wrote: >> > >> >>This is from George Koltanowski's book "TV Chess". It is a mate in 10 with 4 >>underpromotions to a Knight. It is one of my favorites. I was surprised to >>find in the late 80's that the Fidelity Champion Sensory Challenger would solve >>this problem in about 42 seconds. Todays programs will solve this in less than >>1 second. >> >>[D]7K/P1p1p1p1/2P1P1Pk/6pP/3p2P1/1P6/3P4/8 w - - 0 1 >> >>Jim Walker > >This is a nice variation on the same position the I made from another >variation on this position :) >Note the nice queen moves at the end, and that promoting to a knight the >third time will not work. > >[D]8/1p1p1p1p/3P1P2/pp5P/kp6/1p4P1/1P4P1/2K5 w - - 0 1 > >Regards >Andreas Stabel Ah, I like it! It is a mate in 16. Chest on P/133 with 10 MB hash table needs 1.15 seconds to find the main variation: g4 h6 g5 hxg5 h6 b6 h7 g4 h8=N g3 Ng6 fxg6 f7 g5 f8=N g4 Ne6 dxe6 d7 e5 d8=Q e4 Qb8 e3 Qxg3 e2 Kd2 =*= Qxe1 g3 Qa1# Complete solution tree in 1.67 seconds. Wow. Heiner
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