Author: Andreas Stabel
Date: 01:03:37 02/17/00
Go up one level in this thread
On February 16, 2000 at 14:30:40, Vincent Lejeune wrote: >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 ! ;) I'm sorry to say that this is "only" a mate in 180 or so, but still very nice. Here is one more which is very deep. bBrb1B2/P1n1r2p/1Kp1Pb1p/2pk1P1p/5P2/1P2pP2/1pP1P3/1R4n1 w - - 0 1 Regards Andreas stabel
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