**Categories of printable sudoku
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# Printable Sudoku

**Solution of the printable sudoku N 20**

When you start a game of Sudoku, some blocks will be pre-filled for you. You cannot change these digits in the course of the game. Each column must contain all of the numbers 1 through 9 and no two numbers in the same column of a Sudoku puzzle can be the same. Each row must contain all of the numbers 1 through 9 and no two numbers in the same row of a Sudoku puzzle can be the same. Each block must contain all of the digits 1 through 9 and no two digits in the same block of a Sudoku puzzle can be the same.

## Hints to solution of the printable sudoku N 20

Try to fill the cell e9, b9, a8, i8, c1, c4, g9, i6, b6, i5, e4, e3, g3, a2, h1, i9, a9, a4.

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