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George Duke wrote on Fri, Jan 16, 2009 12:26 AM UTC:
So the geometric mean of two items would be either infinite chess like Lava
or at ChessboardMath5 3.January.2008 number (2)''Design CV without a
board for example where pieces competitively mutate''? I thought about
means before for chessboards, and found a strange gap in the fifties.
There are only 3 or 4 CVs having 50-59 squares. So, the next request is
for a board having 53 or 59 squares, the two primes there. The existing
'50-ones' are all 50 exactly or 56. Then there are some 60 squares.  The fifties in CVs must be some island of instability, the way 9x9 itself is compellingly exemplary. What
is nice about Shogi and Xiangqi is how close in size they are. The logical
85 would be 9x9 with four Omega Chess corners, and the logical 86 would be
9x10 with four Morley gaps.