Author: Roger D Davis
Date: 11:03:10 11/30/03
Go up one level in this thread
On November 30, 2003 at 08:58:10, Gerd Isenberg wrote: >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 I disagree, Gerd. The author chose for his engine to run inside the Fritz GUI, so he has to defer to decisions of the GUI. The author may not have bothered with detecting threefold repetitions, simply because he knew the interface would do it for him. He chose the Fritz GUI, not Winboard, so he has to live with the interface and its quirks. Roger
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