godoku.A little logic. One step at a time.

YOUR DAILY DOSE OF DEDUCTION

See the logic.
Find your next move.

Bring a puzzle, or let chance choose one. Follow every deduction and discover how the pieces fit.

YOUR PUZZLE

Start with a blank slate

Scan a printed puzzle, then check the clues.
Select any cell · Type 1–9 · Delete to clear

An empty board, endless possibilities. Add your clues to begin.

FROM PAPER TO PUZZLE

Import a Sudoku photo

Choose a clear photo of a printed puzzle. Your image stays in this browser.

A straight, well-lit photo works best. Handwriting and pencil notes may need corrections.