PeerPuzzles
Sudoku
Fill the grid so every row, column and box holds 1 to 9.
Tap a cell, then a number. Keys 1–9 work too.
Turn on Notes to pencil in candidates.
Every puzzle has exactly one solution, and solves by logic alone.
Progress can't be saved in this browser (private browsing, or site data blocked), so solved levels won't be ticked off.
Free play: a new random puzzle
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