Computer Chess Club Archives


Search

Terms

Messages

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

Author: Uri Blass

Date: 10:54:18 02/09/06

Go up one level in this thread


On February 09, 2006 at 13:27:08, Tony Hecker wrote:

>
>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.

Yes
The 50 move rule is about claiming a draw after 100 plies with no conversion and
not after 50 plies with no conversion.

Uri



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.