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Subject: Re: Official rules of WCCC

Author: Dieter Buerssner

Date: 13:19:01 11/29/03

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On November 29, 2003 at 16:09:44, Gerd Isenberg wrote:

>I'm not sure whether the program has to wait for making the move internally
>until the operator interacts.
>
>If you play on without calling TD, or you call the TD after the position is
>already three-fold repetition, you lost your right to claim the draw.
>Then the opponent has the choice ...

I don't know the exact circumstances. Neither do I know, if Jonny used a GUI
(which might have displayed, what the engine intended to do correctly or not).

Assume the engine showed

move x-y
3-fold repetition

Now, in the (hypothetical) operator manual for the engine, I read:

---
When the engine shows

move x-y
3-fold repetition

you must not execute the move on the board. Instead, you only must write it on
your score sheet, claim a draw, and call the TD.
---

Then, the operator executes the move on the board, anyway. Was it an operator
error? My understanding of rules of CC events I read before, was, that after an
operator error, one should back up the position.

Regards,
Dieter




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