Author: Vincent Lejeune
Date: 11:30:40 02/16/00
Go up one level in this thread
On February 14, 2000 at 11:29:23, Heiner Marxen wrote: >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. >>> >>>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. >> >>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 And now try this one please : This study was posted some years ago (around 1997) in the news : 8/Bk3p1p/1P3p2/KP2n2p/1P1p4/1Pp2p2/B1P5/7B w - - Mate in 270 moves Good luck ! ;)
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