Author: Gerd Isenberg
Date: 05:58:10 11/30/03
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On November 30, 2003 at 08:28:22, Matthew Hull wrote: >On November 30, 2003 at 07:05:36, Gerd Isenberg wrote: > >>What a WCCC. I guess all participants and TDs are a few years older by now and >>need some vacations ;-) >> >>Anyway, big compliments and congrats to Stefan Meyer-Kahlen and his great >>program Shredder. Also congrats to the very unlucky Frans Morsch and his Fritz. >>Both programs really played great chess! >> >>About the 3-fold repetition issue - after Gian-Carlo's statement here, that >>Jonny didn't know about 3-fold repetition at all, but only the fritz-gui, >>i'll think the decision made by the TD was finally correct. > >It matters not that the engine could not detect a 3-fold, it is a draw according >to the rules of chess, just like the 50-move rule or checkmate. Simply no. There is no automatic draw, if a 3-fold repetition occurs. You have to claim it before the position occurs: 1.Stop the clock 2.Call TD 3.Tell TD that the program intends to force a 3-fold repetition by doing that move. 4.The TD proves whether it results really a 3-fold repetition, and has to agree if it is true. 5.Otherwise there is a time penalty. Obviously this is a FIDE rule for human chess, because humans may erroneous claim a draw, e.g. not considering castle or ep states correctly or whatever. This seems a bit anachronistical to computer chess, but even chess programs had and have bugs with this issue, same for 50-move rule. The "main" point is IMHO that Jonny and Shredder didn't implement the correct knowledge, but the fritz-gui, Jonny was playing with. I guess there was no explicite rule about the issue, if engine and external interface disagree. IMHO the engine is the boss here. Gerd >Also, an >operator is not allowed to force his engine to take a lower result. That's >throwing the game and thus illegal, unethical, and cheating all at the same >time. The TDs allowed it thus nullifying the result of the tournament. > >MH > > >> >>Regards, >>Gerd
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