Author: José de Jesús García Ruvalcaba
Date: 03:34:45 12/29/01
Go up one level in this thread
On December 29, 2001 at 03:03:30, Gogi Cviak wrote: >>KNNN vs KR can't possibly be a win for the knights, since RxN is drawn, and >>there are three of them to threaten. In KBN vs KRR, "all" you have to do to win >>is win an exchange with a knight while preserving your bishop, but in this one >>you have to win a whole rook while preserving everything. >-Interesting Questions > >-Bruce > >so KBN VS KRR, can they win? The two rooks can win in some positions, sure. But there must be lots of draws too. >When will all this 6 pieces be finished and I dont >mean those with the pawns, but I would suggest to Eugene to make the most >important endings, like: RPPKRK, IS THIS REALLY A DRAW? If the pawns are not doubled and neither of them is doomed to immediate capture, I expect most of these positions to be won, with some draws. >Will be ever see perfect >moves for this? > >SO KNNN is a draw, I am not sure what you mean, KNNN vs K is generally won (and it is not difficult), KNNN vs KR is quite difficult and perhaps mostly drawn, but Dann's analysis in some other post are very simplistic, so do not believe them without criticism. >but KNNB VS rook is also a draw? This must be generally won for the three pieces. >KRNN VS KR I ALSO THINK IS A DRAW No way, this is won (with a few exceptional positions). >what about >KRBN VS KR, This is also won. >i think we have a win there in over 200 moves? same with KRBB? Also won. I think you are mistaking these endings with KRB vs KNN and KRN vs KNN, which are generally won and where the longest wins have been found (so far as I know). > >Hey if this happens I guess it should be played in real matches, sorry, a win is >a win, sure there can be a break, but play must continue... > I am not sure what you mean. Do you propose a change to the 50-moves rule? (I may not be able to reply later, so I say now that I am against any change to the 50-moves rule). >NOW, KNN V K, IS A DRAW, but dont u think that is A HUGE INJUSTICE IN CHESS, I >MEAN THAT'S 6.25 POINTS, DONT U THINK IN THAT CASE THERE SHOULD BE A NEW RULE, >LIKE ADDING A PAWN OR A BISHOP? > I do not think there is anything unfair and I think your new rule proposal is a very bad idea. >So, tell me KNNN VS KB, IS THIS A WIN? how many moves? I think it is mostly won, and not very long. > >Ken Thompson's endings, I know they are different format from Nalimov's but I am >wondering, they both used different methods in finding the perfect moves? Thompson uses distance-to-conversion, while Nalimov uses distance-to-mate. I think the index-schema is also quite different. So far as I know, neither of them is theoretically perfect (in the sense of giving the theoratical game result of a position with perfect play following the rules of chess). José.
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