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Subject: Re: 50 moves rule in Crafty and Arena

Author: Christopher Conkie

Date: 12:10:20 08/31/04

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Hello Bob,

We have a little analysis in our Support Forum by one of our members Hans.

Here it is....

Black's move 93 is a blunder by Crafty 19.16
since it allows a mate in one in
a position where black can easily hold the
draw by moving the rook to G8
(Black's rook on G6 can not go anywhere else than
G8 to avoid mate, Black's black bishop should stay
on E6 forever guarding the F7 pawn,Black's F7 pawn
should not move,to hold the draw the rook on G6 should
move between G6 and G8 while Black's king should not move)

There was a White pawn capture on move 44 (pawn on f2 did
capture the e3 pawn) and it is mate 50 moves later
(it is not a draw by repeating positions) so Arena
seems to have counted wrong by one
and the same must be for Crafty...

We are currently checking the ASA to see if this has been logged as a report (as
Gabor says below it may be a known issue, I can't find it just yet)

I hope this helps.

Kind Regards

Christopher



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