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Subject: Re: New knowledge in Crafty 18.01? Remote pawn

Author: Robert Hyatt

Date: 20:03:01 02/08/01

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On February 08, 2001 at 18:33:29, Torstein Hall wrote:

>[D]3R4/3r1p1p/2pk4/5r2/6p1/6P1/P3RP1P/1K6 w - - 0 35
>
>This position is from some blitz games played with Fritz 6 and Crafty 18.01
>Crafty won 15.5 - 10.5 but that is not the point.
>
>In this position Fritz 6 belives black to be a little better, even after a
>rather long tink. Crafty 18.01 sees that 35.Rd2+ is a winninig move for white
>because of the remote free pawn endgame resulting. (35...Rd5 36.Rxd7+ Kxd7
>37.RxR PxR and the rest is perhaps easy.) While Crafty 17.11 still want to play
>Rd2+ but do not see it as winning.
>
>Is there some new knowledge about remote pawns in Crafty 18.01?
>
>....and how is other program evaluating this position?
>
>Torstein


Crafty has known about distant passed pawns forever.  I can't imagine why 17.11
would behave differently, but perhaps a bit of tuning along the way as I did
make many changes to that code recently...

The most recent changes have been about "distant candidates" as opposed to
real distant passers.



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