Author: Bruce Moreland
Date: 10:28:10 11/16/00
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On November 16, 2000 at 03:12:13, Bill Gletsos wrote: >On November 15, 2000 at 13:01:29, Bruce Moreland wrote: > >>On November 15, 2000 at 12:53:28, Steve Coladonato wrote: >> >>>On November 15, 2000 at 12:20:30, Robert Ericsson wrote: >>> >>>>A friend of mine claims that the stronger side will, from any start position, >>>>deliver a mate in at least 8 moves in a K+Q vs. K endgame. >>>> >>>>Is his claim correct? If not, how many moves would be the correct claim? >>>> >>>>Kind regards, >>>>Robert >>> >>>I remember the following from long ago: >>> >>>From any start position, a mate can be accomplished in at most the following >>>number of moves: >>> >>> KQ v K = 9 moves >>> KR v K = 12 moves >>>KBB v K = 20 moves >>>KBN v K = 34 moves >>> >>>I don't recollect if the stronger side is on the move or the weaker. >>> >>>Also, the latest tablebases may have shed some light on the above numbers. >>> >>>Regards, >>> >>>Steve >> >>You are quoting numbers produced by Ruben Fine in Basic Chess Endings, in at >>least two of these cases (KQ vs K, and KBN vs K). >> >>The correct numbers are 10, 16, 19, and 33. >> >>bruce > >Bruce > >Your numbers are correct but according to Reuben Fine in Basic Chess Endings he >gave the numbers as 10, 17, 18 and 34. > >Bill Yes, and Fine is wrong. Some people spend considerable time trying to find mistakes in BCE, there are a lot to find. There are three mistakes right there. bruce
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