Author: Bruce Moreland
Date: 14:31:14 09/18/00
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On September 18, 2000 at 02:53:05, Uri Blass wrote: >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 It took about an hour on a Pentium Pro 200. The file is bigger than the 8 x 8 version, by several times, but it still wasn't that bad. bruce
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