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
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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.