Once upon a time there lived a man who wasted all his money, and
grew so poor that his only food was a few grains of corn, which
he scratched like a fowl from out of a dust-heap.
One day he was scratching as usual among a dust-heap in the
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(The Guarded Chessboard)
I have a single chessboard and a single set of chessmen. In how many
different ways may the men be correctly set up for the beginning of a
game? I find that most people slip at a particular point in making the
calculation.