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Subject: Re: number of moves in position (problem solution)

Author: leonid

Date: 17:05:14 09/21/99

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On September 21, 1999 at 18:13:23, Heiner Marxen wrote:

>On September 21, 1999 at 15:48:02, leonid wrote:
>
>>On September 21, 1999 at 11:13:51, Heiner Marxen wrote:
>>
>>>On September 20, 1999 at 20:07:30, leonid wrote:
>>>
>>>>
>>>>For those who really like some big number of moves in one position. One of
>>>>my old positions for solving the mate. White have 113 moves and make
>>>>mate in 5.
>>>>
>>>> -------------------------------------------
>>>> |    |    |    |    |    |    |    |    |8
>>>> |    |    |    | *R |    | *Q | *K | *Q |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |    |7
>>>> |    |    |    |    |    |  *Q| *Q | *Q |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |    |6
>>>> |    |    |    |    |    |    | *Q |    |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |    |5
>>>> |    |    |  N |    |    | *R |    |    |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |    |4
>>>> |    |    |    |    |    |    |    |    |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |    |3
>>>> |  Q |  Q |  Q |  Q |  Q |  Q |  Q | Q  |
>>>>--------------------------------------------
>>>> |   B|    |    |    |    |    |    |    |2
>>>> |    |    |    |    |    |    |  Q |    |
>>>>--------------------------------------------
>>>> |    |    |    |    |    |    |    |  K |1
>>>> |    |    |    |    |    |    |    |    |
>>>>--------------------------------------------
>>>>
>>>> * - black color.
>>>>
>>>>Position created in 1996.
>>>
>>>FEN: 3r1qkq/5qqq/6q1/2N2r2/8/QQQQQQQQ/B5Q1/7K w - -
>>>
>>> Qxf7+ Q6xf7 Bxf7+ Qfxf7 Qxd8+  Qe8    Qaa2+  Rf7    Qfxf7#
>>>
>>>It is not free of duals, but it is not supposed to be so, right?
>>>The key move Qxf7+ is unique.
>>>
>>>Heiner
>>>
>>
>>I don't know if I understood correctly but if you wanted say that few
>>moves can lead to the mate in the same position, I agree. I don't know
>
>Yes, that is meant by a "dual": the attacker has more than one move
>to solve the position.  Problem composers always try to avoid a dual
>in the posed position: such a problem would be considered wrong/buggy.
>Sometimes problem composers try hard to avoid further duals down the
>solution tree.

Very intersting for me to know this. To be sincere, I never was the chess
game fanatic and know very little about all the "official" gestures. But I
imagine that the position with more that one solution was considered as bad
taste only because human found it too complicated for him. For logic it make
no difference. In game programming I came by accident and mainly because it
could represent nice challenge for Assembler programming, not because I am
chess savvy.


>>exactly for this one but many have. When I want to see if few moves leading
>>to the mate existe I ask the logic to find them all. Here logic said that mate
>>existe in 5 moves. If some logic will find mate before this number it is
>>buggy.
>
>Aah, hrmm.  Now I start to be really curious about your "logic" for mate
>solving.  I'd like to learn more about it.  Something I could read somewhere?
>
>Heiner

I don't know if the description of the Mate Solving Logic stays as single on
the Web. As part of the chess game, that I am writing now, for sure. Actually my
game is composed from two parts: one already finalised (Mate Solving Logic) and
the second (Positional Logic) that I hope I am close to end very soon.
You can find the game at the address of my friend. On the same place you will
find many inevitable mate positions. Partially they were found in the books
and many were created during the creation of the Mate Solving Logic.
Address:  http://www.geocities.com/iparticle

Leonid.



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