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FUTOSHIKI puzzles can vary in size from 4x4 up to 8x8. They are solved by placing digits into the cells of the puzzle so that each row and each column contains just one of the digits from 1 up to the size of the puzzle. To get you started there will normally be several digits already in the puzzle. In addition, a few pairs of adjacent cells will have the < and > symbols inserted between them to indicate the relative sizes of the numbers within those cells. Each puzzle has a single unique solution, and no guess-work
is required to solve them.