Sudoku board
Use the number pad or keyboard to enter values. Turn Notes on, or hold Shift while pressing a number, to add candidate marks. Press Enter to commit the current value and move focus down one cell when possible. Walkthrough mode locks the board for review.
Walkthrough
Signed-in users can replay each solving step with timeline controls and board highlights.
Free account
Step-by-step walkthrough
Create a free account to use Solve and replay the walkthrough. Full Access adds technique board animations inside supported steps.
Current step