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## BISHOPS IN CONVOCATION.

(

Chessboard Problems)

[Illustration:

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The greatest number of bishops that can be placed at the same time on

the chessboard, without any bishop attacking another, is fourteen. I

show, in diagram, the simplest way of doing this. In fact, on a square

chequered board of any number of squares the greatest number of bishops

that can be placed without attack is always two less than twice the

number of squares on the side. It is an interesting puzzle to discover

in just how many different ways the fourteen bishops may be so placed

without mutual attack. I shall give an exceedingly simple rule for

determining the number of ways for a square chequered board of any

number of squares.

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