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Subject: Why don't engines claim 50-move draw after I set up fen position?

Author: Tony Hecker

Date: 10:27:08 02/09/06


For example, if I set up this position with an engine (black) to move, I would
expect the engine to claim a 50-move draw, because the FEN string indicates a
half-move clock of 49.  Instead the engine moves .. Ka2 and lets white
checkmate.

[D]8/8/3R4/8/8/8/2K5/k7 b - - 49 120

I issue the following commands to a winboard engine:
xboard
setboard 8/8/3R4/8/8/8/2K5/k7 b - - 49 120
go

I tried this with a few engines, crafty, zappa, yace, shredder w/ polyglot, all
with the same result.  Is there a reason for this I am not understanding?  Isn't
it legal to claim the draw here?  Anyone know of an engine that claims the draw
in this case?  Thanks.

Thanks, I didn't know the rule was for 50 _full_ moves Tony Hecker 15:40:44 02/09/06
Re: Why don't engines claim 50-move draw after I set up fen position? Uri Blass 10:54:18 02/09/06
Re: Why don't engines claim 50-move draw after I set up fen position? Richard Sutherland 10:51:16 02/09/06

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