Each grid starts with 38–43 of the 81 cells already filled.
Arrows move · 1–9 fill · N notes · H hint · ⌘/Ctrl+Z undo
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Tap a cell, then a number. Notes toggles pencil marks.
Easy Sudoku is the level to learn on. Every puzzle here can be finished by scanning alone — pick a digit, check which rows and columns already contain it, and the cell it belongs in is usually the only one left. No guessing is ever required, and none of these grids need pencil marks.
Learn the techniques that turn a stuck grid into a solved one.
Two pattern-based Sudoku techniques that unstick expert grids — what they are, how to spot them, and when they are worth the effort.
When scanning runs out, notes take over. How to write candidates that actually help, and the pair pattern they exist to reveal.