Sudoku

Start with the core loop

Play free Sudoku online with easy, medium, and hard daily puzzles, pencil notes, mistake checking, and timing.

Click or tap the board to act. Most puzzles also support arrow keys, Enter, and restart without reloading.

Build a better run

Replay for fewer moves and a faster solve, then raise the board size or difficulty when the pattern becomes familiar.

Play with intent

Read the whole board before committing. Forced moves and constraints are more valuable than guesses.