Author: Vincent Diepeveen
Date: 15:19:57 09/20/00
Go up one level in this thread
On September 18, 2000 at 23:51:59, Uri Blass wrote: >On September 18, 2000 at 20:43:56, James B. Shearer wrote: > >>On September 18, 2000 at 17:28:56, Bruce Moreland wrote: >> >> <snip> >> >>>The above might have bugs. If not, it's the worst case with white to move, mate >>>in 47. This looks like a harder case than the standard 8 x 8 board, since black >>>can start out in a corner, constrain white for a bit, then evade to the center, >>>since, I presume, the knight is too slow to catch black. In the 8 x 8 version, >>>black starts out in the center in the worst case. >>> >>>KR vs K is a mate in 21, and KQ vs K is a mate in 12. >>> >>>I can't do a 9 x 9 board as easily as a 10 x 10 board, but I think it may be >>>possible that you could have a "wrong" bishop in KNB vs K with that sized board, >>>so it could be a draw in some cases. >>> >>>bruce >> >> This is interesting. How about Q vrs R? >> 47 moves isn't as many as I would have guessed and makes me suspect you can >>mate with B and N on any board with a corner of the right color. 12x12 would be >>the next case to try. >> James B. Shearer > >My guess is that if the board is big enough you cannot mate because you cannot >lead the king from one corner to another one. > >I do not say that 12 is big enough. > >Uri You can always close in the king of course by making the corner smaller. the theory is real simple. just make the diagonal smaller and smaller. you have 2 pieces and a KING to close in the king into a smaller and smaller diagonal. It'll be hell of a work to mate someone on a 100x100, but he. Just bet for money that i can't do it...
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