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Subject: Re: Mate in ...?

Author: leonid

Date: 18:30:48 02/13/00

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On February 13, 2000 at 18:02:20, James T. Walker wrote:

>On February 12, 2000 at 10:18:44, leonid wrote:
>
>>Hello!
>>
>>Please give your position that contain mate between 4 and 8 moves. Would like to
>>know the speed at which usually logic solve mates. I did this four years ago,
>>but then I was alone. Now data could be more diversified and useful for me as
>>for somebody else.
>>
>>Until now positions presented here were almost all the time beyond 9 moves (18
>>plies). This make solution too long to find.
>>
>>Please indicate your hardware and your game.
>>
>>I will give,  for start, one very simple position that contain mate in 6 moves.
>>White to go.
>>
>>/1q2kr2/rB2bbp1/3p1n2/1NpP2BN/P4P1p/1P2Q3/6PP/R3K2R/ White to go.
>>
>>Thanks for your next position!
>>Leonid.
>
>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


Position tryed on AMD 400Mhz. LLchess (mate solving logic).
10 moves - move A7-A8.

Time don't know exactly because of high speed. Had only zeros. Should be below
0.05 sec.

Forget to try 9 moves ahead. Was in rash.

Position is the most elegant ever. Was surpised while was seeing the white pawns
going to be promoted to the knight, one by one. Even the last one, that make the
mate, was knight. Curious domino effect.

Enjoyed position very much!
Leonid.



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