Sudoku is one of the most popular puzzle games of all time. The goal of Sudoku is to fill a 9×9 grid with numbers so that each row, column and 3×3 section contain all of the digits between 1 and 9.
| Key | Action |
|---|---|
| ← | move left |
| → | move right |
| ↓ | move down |
| ↑ | move up |
| 1..9 | insert value |
| e | remove value |
| ESC | open menu |
| Ctrl+Z | quit |
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