Play Online Sudoku
Welcome to the new hub of online Sudoku! Here you can play online Sudoku to your heart's content - either for stress-free fun, or you can register a free account and compete against other players to see if you have what it takes to make it to the Sudoku Hall of Fame.
We offer playing boards of all types, from easy and medium, to difficult and even "ultra crazy" boards which only a small fraction of the playing community will be able to successfully solve. You are even allowed to "ghost" in up to five numbers per cell to keep track of all playing possibilities. As you play, you can click the "Check" button to see if you've made any mistakes.
In competitive play, you're allowed to check your progress, but be careful! Five mistakes from using the "Check" function and you'll be disqualified. (You can still finish the puzzle, it just won't count as a successful solve in your playing statistics).
(dedicated server)
