These printable sudoku puzzles are four different levels of difficulty. You want to start with the easy ones, but if you're an expert, you can skip to the extra hard puzzles. The post 20 Printable ...

Sudoku is defined by Merriam-Webster as a 9-by-9 grid puzzle in which the grid is divided into 3-by-3 boxes. Every row, column and box must contain the numbers one through nine, no repeats.