The 7 Knights Problem

 

by Martin Gardner

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You have 7 chess knights. Place one of them on any empty cell of a 3x3 board and then move it to another empty cell using knight's move (some examples of such moves are shown in the bottom diagrams, a and b).

Then in exactly the same way place and move another knight. Repeat your "place-move" steps till you have all 7 knights placed on the board.

Posted: December 11, 2007
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Triangular Numbers Two Containers
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