Pencil marks built in
Sudoku with notes
Tap Notes, then tap a digit to store a candidate in the selected cell. Turn Notes off to place a real number.
Wednesday, September 9, 2026 · medium
0:00
When notes help
Medium and hard boards have fewer givens. Candidates keep two options visible so you do not hold them in working memory.
Questions
- Are notes allowed in sudoku?
- Yes. Tournament players use them. They are part of the standard method, not a hint system.