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Sudoku is very popular puzzle game. Sudoku is a very popular game and is a logic puzzle which trains you brain.

Sudoku is a Japanese puzzle game. It's based on numbers logical placement. The goal is to fill 9x9 grid with digits so that each column, row, and 3Ã—3 section contain the numbers between 1 to 9. Some of the squares will be filled out at the beginning of the game. You have to complete the grid by filling in missing digits. The rules are:

- Any row contains distinct numbers from 1 to 9, i.e more than one of the same number from 1 to 9 the row is not permitted
- Any column should contain distinct numbers from 1 to 9, i.e more than one of the same number from 1 to 9 in the column is not permitted
- Any 3Ã—3 grid should contain distinct numbers from 1 to 9, i.e more than one of the same number from 1 to 9 in the grid is not permitted

Sudoku is very popular logical, combinatorial number-placement Japanese puzzle.