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Subject: Re: Puzzle for Chest under steroid ! (was Re: Mate in ...?)

Author: Andreas Stabel

Date: 01:03:37 02/17/00

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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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