Author: Uri Blass
Date: 23:53:05 09/17/00
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On September 18, 2000 at 02:36:13, Steffen Jakob wrote: >On September 17, 2000 at 21:40:05, Vincent Diepeveen wrote: > >>On September 17, 2000 at 20:53:47, James B. Shearer wrote: >> >>> Someone asked in a usenet forum about mating with KBN on larger than 8x8 >>>boards. Opinion was mixed on whether it was possible. Has anyone done table >>>base computations for say a 10x10 board? >>> James B. Shearer >> >>I assume a 50 move rule isn't valid anymore at such a board, so >>give me 5 minutes on a clock and bet for 100 dollar that i can't do it, >>and you'll know :) >> >>You just need another few moves to close the king a bit further in. >>there are several methods to mate. I'm sure one of the methods is a bit >>harder now, but if you use the 'making the diagonal smaller' method, >>then it's still a peanut. Just don't let the king escape or even the >>100 move is gonna get tough :) > >Yes, you should always be able to mate if the number of files/rows is even. But >it's not possible to force the mate on a e.g. 9x9 board where all corner squares >have the same color and you have the wrong bishop :-) > >Greetings, >Steffen. I do not know. In chess you cannot push the king from one corner to another corner without letting the king to leave the line between the corners so it is not obvious that you can do it in bigger board. The only way to answer about 10*10 is building the KBN vs K tablebases for this board and it should take less time than building the 5 piece tablebases in regular chess. Uri
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