Saturday, 29 December 2012

A random puzzle

From the inventive mind of Henry Ernest Dudeney comes a couple of chess puzzles. Take a 4x3 chessboard with 4 white knights and 4 black knights arranged at the top and bottom of the board. Label each knight A.B,C,D corresponding to the file they are standing on. What is the minimum number of moves required to swap the position of each knight with its counterpart?
If you want an easier puzzle, place 2 white knights and 2 black knights on the corners of a 3x3 chessboard. What is the minimum number of moves to swap the positions of the white knights with the black knights (it does not matter which knight is swapped for which)?

1 comment:

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