IEEE Weekly Puzzle #2 – PAWNS AND BISHOP

02 November 2015 Comments Off on IEEE Weekly Puzzle #2 – PAWNS AND BISHOP

On a 7×7 chessboard, you are to place pawns on some of the squares such that the bishop you will place on one of the empty squares will threaten at least two pawns. What is the minimum number of pawns that must be placed to fulfill this requirement?

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This question was prepared by Emrehan Halıcı, president of the Turkey Intelligence Foundation, for Bilkent IEEE.