Printable Sudoku

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Printable Sudoku

The printable Sudoku allows us to play our favorite puzzle without internet and at places where we wouldn’t want to use our digital devices. From the menu above the board, simply select the difficulty level of the 9×9 Sudoku you’d like to print out. You can also opt for the 4×4 board, which is primarily for children. After selecting the level of difficulty, simply click on the printer icon, so you can play Sudoku anywhere.
The general problem of solving Sudoku puzzles on n2×n2 grids of n×n blocks is known to be NP-complete. The number of classic 9×9 Sudoku solution grids is 6,670,903,752,021,072,936,960, or around 6.67×1021