Killer Sudoku - The Lethally Addictive Sudoku Variant
Sudoku for the brave of heart! Sharp-minded solvers willing toventure into dangerous puzzle territory will find satisfactionnavigating these killer sudoku. Each one looks like a regularsudoku, but with a challenging twist: there are also additionalboxes surrounding sets of squares. Those boxes contain tiny numbersthat tell you the sum of the digits inside the box. It?s abrain-stretching variation that will delight sudoku fanseverywhere.ISBN13: 9781402771866
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