Author: Christophe Theron
Date: 19:23:39 10/19/00
Go up one level in this thread
On October 19, 2000 at 16:31:38, Howard Exner wrote:
>On October 18, 2000 at 14:14:20, Uri Blass wrote:
>
>>On October 18, 2000 at 12:34:42, Ricardo Gibert wrote:
>>
>><snipped>
>>>The algorithm to determine whether this type of position is drawn is quite
>>>simple. With the h-pawn, Black draws if the K can get into the four corner
>>>squares g7,g8,h7,h8. Otherwise, the outcome is not assured. Note, it is not
>>>enough for the King to get in front of the pawn as the following position
>>>illustrates:
>>
>>I can give another rule:
>>Blacks draw if it is black to move and the distance between the black king and
>>the corner in king moves is smaller than the ditance between the corner and the
>>white pieces except the bishop(white king in king moves and white pawn in pawn
>>moves)
>>
>>If it is white to move then use distance-1 instead of distance for white.
>
>This is very useful, I have many endgame books and I've never seen this
>description. It's one thing to point out where a program goes wrong and quite
>another to offer a solution in programmable language, like you have done.
>
>I think we all would like to see programs have a good routine to solve this
>scenario.
You can count on me. I'll integrate this rule in Chess Tiger and Gambit Tiger as
soon as it is confirmed that I can use it even when white has several pawns on
the A or H file.
Christophe
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