Enter known numbers, auto-solve 9x9 Sudoku. Hints, validation, puzzle generation.
No dependencies · Works offlineSudoku Board
FAQ
What is Sudoku?
Sudoku is a logic puzzle where you fill a 9x9 grid with numbers 1-9 so that each row, column, and 3x3 box contains no duplicates.
Sudoku solving tips?
1) Naked single: only one candidate left; 2) Elimination: a number can only go in one cell in a row/column/box; 3) Candidate marking: write all possibilities and eliminate step by step.
How does the hint feature work?
The hint feature finds one cell that can be determined and fills in the correct answer, helping you progress without revealing the entire solution.