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Subject: Re: A new kind of "swindle mode" for Crafty

Author: Uri Blass

Date: 06:44:41 09/28/00

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On September 28, 2000 at 07:15:45, Vincent Lejeune wrote:

>I would suggest a new type of "swindle mode" : the method is based on 1) make
>the right move difficult to find for a human and 2) play quickly to put pressure
>on human
>
>Here's the Idea : if an endgame is a tablebase draw, select all the drawing
>moves and explore them only in tablebase to measure where the human will have
>the hardest work to do : calculate, for all this drawing moves, with iterative
>deepening, the worst ratio (number of drawing moves for human divide by number
>of possible moves for human) for the human in the tree, because a narrower path
>is difficult to follow (see the game Deep Thought-Alex Fishbein post some days
>ago: where human had only one drawing move he didn't find it). The depth still
>to be dertimined may be 5 plies, may be 10 or simply play right after the
>human's move to put maximum pressure.
>
>This method exploit the main point of tablebase eg : the precision allied with
>the speed; where the human brain get kill by machine.
>
>I hope that Bob will test this algorithm for Crafty , I'm confident in it :)
>
>If I was not enough clear please tell me...
>
>Best regards
>Vincent Lejeune

I do not understand

Here is a possible position KRB vs KR.
[D]8/7R/2k2K2/5B2/8/8/8/2r5 w - - 0 1

After Rc7+ black has exactly one drawing move out of 5.

Do you suggest Crafty to play Rc7+ because the ratio is probably the best with
this move or do you suggest to search deeper in order to calculate the best
ratio that you can force in 5 plies assuming the opponent play good moves?

Uri



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