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Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9Г—9 grid with digits so that each column, each row, and each of the nine 3Г—3 sub-grids that compose the grid (also called "boxes", "blocks", "regions", or "sub-squares") contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid.
Tags: Sudoku