Fill every row, column and 3×3 box with the numbers 1 to 9, with no repeats. Pick a cell, then tap a number or type it. Turn on Notes to pencil in candidates.
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0Mistakes
How to play
Each row, column and 3×3 box must contain 1–9 exactly once.
Bold numbers are givens and cannot be changed.
Select an empty cell and enter a number. Wrong or clashing numbers turn red and count as a mistake.
Use Notes to pencil in candidates, and Hint if you get stuck.
Fill the whole grid correctly to win. Your best time per difficulty is saved.
Controls
Mouse / touch: tap a cell, then tap a number on the pad.
Keyboard:←↑→↓ move, 1–9 enter, Backspace or 0 erase, N notes, H hint.