Author: Dann Corbit
Date: 22:26:50 05/13/05
Go up one level in this thread
On May 13, 2005 at 22:39:23, Komputer Korner wrote: >On May 13, 2005 at 13:39:00, Dann Corbit wrote: > >>On May 12, 2005 at 21:46:14, Komputer Korner wrote: >> >>>If you hang Shredder9 any time either by making the mistake of pressing the X >>>button in the top right korner or else by pressing CTRL-Alt-Delete when >>>Shredder9 is calculating, Shredder9 refuses to shut down. It does not behave >>>like a well mannered Windows program is supposed to. In the above cases, you >>>have to reboot the computer because Shedder9 will keep creating clones of itself >>>to prevent it from being shut down abnormally. >> >>Chessbase? UCI? >>I have never had any problem. I use UCI exclusively. Sometimes under the >>Shredder classic interface and sometimes under other interfaces. >> >>>Another small bug I found is that >>>it often will report a mate in 150 when it has a winning advantage. I suppose >>>the programmer's sense of humour is at work here, but these bugs should be >>>corrected. >> >>That is not a defect. In fact, if it does checkmate in 150 moves or less, then >>it was surely correct. Chess programs do not report minimum distance to mate >>like a chess solver. They report "Mate in AT MOST <n>". >> >>Now, if later on Shredder says "Mate in 300" then there might be a bug because >>it should not lose a close mate and switch to a farther one. >> >You meant "Chess programs DO NOT report maximum distance to mate" Maximum distance to mate is about 6000 fullmoves. It would not be a very interesting announcement. >However they >do. almost all of the best ones do including Fritz,Shredder..etc You are wrong. They give their best estimate, which often improves (and that is for every single program that is not a mate solver). Each and every professional program will announce a mate in x and later a mate in x-k and then later in x-k-l etc. >They don't bother with a nonsensical mate in 150 forecast. Several programs do this. It simply means "I am going to win" and it is a very smart thing to do. You will find that it is not an uncommon announcement among excellent programs.
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