Geometric Magic Squares: A Challenging New Twist Using Colored Shapes Instead of Numbers (Dover Recreational Math)

By: Lee C.F. Sallows

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Synopsis: Traditional magic squares employ a chessboard-like arrangement of numbers in which the total of all rows, columns, and diagonals add up to the same number. This innovative approach by a British engineer shines a new light on the centuries-old amusement, challenging puzzlists to think two dimensionally in solving dozens of creative puzzles with vivid geometric shapes instead of numbers. Attempt The Twelve Pentominoes, a challenge consisting of the formation of a dozen different shapes from five-unit squares. Squeeze together the 16 pieces of a 4 x 4 self-interlocking square to form an empty 4 x 4 array. Take aim at 48 targets featuring astrological signs in a self-interlocking square. Suitable for puzzle lovers ages 12 and up, these and other colorful variations on conventional magic squares offer hours of captivating entertainment.