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Killer sudoku的规则跟原本的数独一样,只是外加一条规则:每一个虚线图形(称为“区”)内数字的总和.都要跟它附有的数字相同。
Killer sudoku’s rules are the same as the original sudoku except for the rule that the sum of the numbers in each dotted graphic (called the “zone”) should be the same as the number it is attached to.