Make it a short routine
Scan first, add candidates only when needed, and return to simple checks after every placement or elimination.
Follow a reliable solving orderUse arrow keys to move one cell, Home and End to move within a row, digits 1 through 9 to enter a value, N to toggle notes, H to explain the next step, Shift plus H to apply that step, and Escape to pause.
Game paused
Puzzle complete
Your result has been saved on this device.
One shared challenge for your day.
The same local calendar date always selects the same certified puzzle on this device. Finish consecutive dates to build your private streak.
Hints do not act immediately
Explain previews the strategy and target cell. Applying the step is a separate choice, so you can try to finish the deduction yourself.
Review controls and hintsYour history stays local
Completion dates, streaks, and best times remain in this browser without an account.
View local statisticsPractice beyond today
Choose a consistent difficulty for focused training or print a four-puzzle sheet.
Browse printable Sudoku