How to Use Notes (Pencil Marks)

Organize tough puzzles by writing down candidate numbers.

Difficult puzzles are hard to solve in your head alone. Jotting down the possible candidates in each empty cell makes techniques like Naked Pairs and X-Wings visible.

Turn on this game's Notes mode to mark multiple candidates in a single cell — when you confirm a number, matching candidates in related cells are removed automatically.

Keeping your candidates up to date matters. Clean up the candidates in the same unit every time you confirm a number, and your next move becomes easy to spot.