1sudoku.com is a website for free online sudoku. The sudoku puzzles are classified according to 5 levels of difficulty: sudoku easy, medium, hard, expert and evil. You can play Sudoku on your mobile, tablet or computer for free.
Play free sudoku 9x9 online
Although the classic 9x9 grids are the most common, there are several variations of sudoku. There are size variants (larger grids type 16x16 or smaller type 4x4 for children), Sudoku variants with irregular regions, with mathematical or logical constraints. There are also alphabetic sudoku variants as wordoku which use letters instead of numbers.
Print sudoku puzzles for free from 4 to 6 per page, in pdf or html format. You can also print the sudoku solutions or find them online.