Sudoku is a logic-based number placement puzzle.
Starting with a partially completed 9x9 grid, the
objective is to fill the grid so that each
row, each column, and each of the 3x3 boxes
(also called blocks) contains the digits
1 to 9 exactly once.
Tags: sudoku sencillo con 9 numeros , sudoku estrella que den 18 , sudoku express
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