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Subject: Re: DJ7 and Nolot #1

Author: Uri Blass

Date: 21:12:09 04/19/02

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On April 19, 2002 at 16:19:33, Robert Hyatt wrote:

>On April 19, 2002 at 12:54:47, Gian-Carlo Pascutto wrote:
>
>>On April 19, 2002 at 12:31:46, Robert Hyatt wrote:
>>
>>>This is wrong thinking.  If it will play the right move for the wrong reason,
>>>then in similar positions it will play the _wrong_ move for the wrong reason,
>>>and lose.
>>>
>>>All you have to do is add a simple endgame rule that says _always_ centralize
>>>the king to see why this happens.  Then give your opponent a passed pawn on
>>>the edge of the board and see how much that king in the center helps.  The
>>>idea is that centralizing is not the right idea.  The right idea is to get the
>>>king to wherevere it is needed, whether that is the edge, the corner, or the
>>>center.  Just moving it to the center will be right in plenty of positions.
>>>But it will be wrong in enough to make it obvious, too...
>>
>>Good example. Having the king in the center in the endgame is an excellent
>>rule. It will be right much more than it will be wrong. You'll easily see
>>a significant different in playing strength when comparing programs with or
>>without this rule.
>
>OK... I will play your program and all it can use is "centralize the king".
>
>Care to bet on how endgames are going to turn out?  Hint:  I _won't_ be
>making passers in the center.  That is a weakness that can easily be exploited
>once it is spotted.  It might work fine in most _random_ positions.  But I am
>not going to give your program random positions.  I'm going to give it positions
>where I know it will screw up.  And it will.  Over and over and over.
>
>That is why it won't work...

Knowing to centralize the king is better than knowing nothing about the king's
square.

If your program does not care about the square of the king in endgame I am going
to get a passed pawn in the side that the opponent king is not there
and beat it.

If your program knows to centralize the king then it has better chance to find
the right move by search because the distance between the right square and the
centre is smaller.

Uri



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