← Thinking Mode
Sudoku
fill the grid 1–9
Easy
Medium
Hard
Expert
Master
Grandmaster
New
Generating puzzle…
1
9
2
9
3
9
4
9
5
9
6
9
7
9
8
9
9
9
↶ Undo
↷ Redo
💡 Hint
✏️ Notes off
⌫ Erase
Notes ✦
Wrong entries turn red · duplicates are blocked ·
N
notes ·
U
undo