Sudoku is one of the most popular puzzle online games. The goal is simple, fill in the boxes in the grid, so each column, row, and 3×3 square has the numbers 1-9 appearing one time each.
There are hundreds of thousands of different Sudoku puzzles. Take the daily Sudoku challenge and see if you can correctly complete a new game board every day. When the solution becomes too easy, adjust the settings and play on the more difficult levels.