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The original Panex puzzle is from the Japanese Magic Company
from the 1980's. Mathematicians at Bell Laboratories estimated
the number of moves to swap 2 columns of order 10 to be
27,564 <= N <= 31,537. It came in two varieties: one with a
blue and a yellow pyramid of order 10 on silver tiles; in the
gold version pieces of each color look alike i.e. no pyramid
is drawn on them), this is a little harder.
The original Tower of Hanoi puzzle is the invention of
Edouard Lucas and was sold as a toy in France in 1883. The
legend of 64 disks in the great temple of Benares of the god
Brahma is also his invention.
WWW: http://www.tux.org/~bagleyd/puzzles.html
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