Latin Square

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Latin Square: Click the squares to cycle through icons. In each puzzle, shade in some squares so that: 1) no shaded squares are adjacent (not even diagonally), 2) there is exactly one shaded square in each row and in each column, 3) each number is equal to the number of adjacent (including diagonally) shaded squares. Squares containing a number cannot be shaded. The "x" icons are treated as blank squares and can be used to keep track of squares that should not be shaded. A solved puzzle is shown below. Each puzzle has a unique solution. All puzzles were designed by Erich Friedman.

           

Complete source code can be found here.

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