Author: Sune Larsson
Date: 09:59:02 04/01/00
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On April 01, 2000 at 12:42:16, Robert Hyatt wrote: >On April 01, 2000 at 10:35:50, Harald Faber wrote: > >>On April 01, 2000 at 08:18:51, Frederic Friedel wrote: >> >>>Amazingly it never occurred to anyone -- Thompson, Stiller, Nalimov -- to run >>>through the ending K+N+N vs K. Everyone assumed it was simply a draw in every >>>case. Well, fire up your Nalimov tablebase generator and prepare for a shock! In >>>over 10% of all legal positions the attacking side can forced a mate in 31 to 48 >>>moves. It is difficult to do anything systematically with the tablebase after it >>>has been generated (except play against them), but as far as I can tell the >>>attacking side can force a win if the defending king is on one of the squares >>>a1, b1 or a2 and the attacking king and at least one knight is within the square >>>a1-d1-d4-a4. Naturally this can be reflected in all four corners of the board. >>>Some of the mates are wonderfully intricate and involve forcing the king to >>>move to a4 (or d1) and back again to a1. John Nunn is studying the ending and >>>will provide a better statistical evaluation soon. >> >>I even found a position where KNK is won! > > >There is exactly one position where a lone king can mate another king. Provided they are real mates... > > > > >but he usually gets arrested if he is caught doing that in public. > >:)
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