Sudoku Play | Hint | Solve

Full generator, logical hints with explanations, and an instant solver.

Time00:00

Mistakes0/3

Hints left5

Notes (N)

Click a cell, then type 1-9 | <^v> move | erase | H hint

Welcome! Pick a difficulty and press New Game. Use Hint to learn the logic, or Solve to finish instantly.

Solver speed highlight peers auto-check mistakes

How hints work:

Naked single - only one digit fits in a cell.
Hidden single - a digit fits in only one cell of a row / column / box.
Naked pair / pointing - basic eliminations shown when available.
Otherwise the solver reveals the cell with fewest candidates.

Generator guarantees a unique solution | Solver uses backtracking with MRV heuristic | Everything runs 100% locally in your browser. Open index.html directly - no build step.