Computer Chess Club Archives




Subject: Re: Draw by treefold repetition

Author: Robert Hyatt

Date: 07:04:32 03/08/06

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On March 08, 2006 at 00:47:39, Pedro Castro wrote:

>[D]7Q/4bk1p/p2r2p1/1p3p2/1P6/P4P2/6PP/5K2 b - - 0 41
>41. .. h5
>42. Qh7+ Kf6
>43. Qh8+ Kf7
>44. Qh7+ Kf6
>45. Qh8+ kf7
>1/2 - 1/2
>Is it correct?
>My doubt is if it is necessary to consider that in the movement 41.. h5 is a
>possibility to eat ep and therefore a move more would be needed take treefold
>In my opinion I believe that it is not necessary to consider, GUI Fritz and
>Arena they consider this way it, but I believe that this it is an error that
>have many engines, included mine.

That's not a draw yet.  The _same_ position has to be reached 3 times, with
every piece on the same square, same castling rights, etc.  Any capture resets
the repetition counter.

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