The Two Queen Question

 

Solution

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Solution to Puzzle 1. To attack the maximum possible number of vacant cells two chess queens should be placed in the center of the chessboard as shown in Solution A. In this case 42 vacant cells are under attack.

Solution to Puzzle 2. To attack the minimum possible number of empty squares two chess queens should be placed in any of the four corners of the chessboard in two adjacent squares - as shown in Solution B. In this case total number of vacant cells under attack is 32.

Last Updated: January 26, 2006
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