Sudoku Merely Report

Sudoku, originally called number place, is a logic-based, combinatorial number-placement puzzle. the objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 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, which typically has a unique solution. completed puzzles are always a type of latin square with an additional constraint on the contents of individual regions. for example, the same single integer may not appear twice in the same 9×9 playing board row or column or in any of the nine 3×3 subregions of the 9×9 playing board.

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