Author: Uri Blass
Date: 20:51:59 09/18/00
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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
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