Sudoku Rules and How to Play
No math is required. Fill the empty cells by logic so digits do not repeat.
The Three Basic Rules
- Each row must contain the digits 1 through 9 exactly once.
- Each column must also contain the digits 1 through 9 exactly once.
- Each outlined 3x3 box must contain the digits 1 through 9 exactly once.
Game Controls
Notes add small candidate digits to a cell. Erase clears the selected cell and its notes. Undo returns to the previous move. Hint fills the selected empty cell with the correct answer.
Advertisement
How a Puzzle Is Completed
The puzzle is complete when all 81 cells are filled correctly. Your time, mistakes, and hint count are shown in the result.
Start Today's Sudoku