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Play Kropki Sudoku free online. Standard Sudoku rules plus outside clues: each number gives the sum of the digits strictly between the 1 and the N in that row or column. 27 hand-crafted levels across six tiers.
Play Kropki Sudoku free online. Standard Sudoku rules plus outside clues: each number gives the sum of the digits strictly between the 1 and the N in that row or column. 27 hand-crafted levels across six tiers.