⏱ 0:00
▦ 6×6

📖 How to play

  1. Click a cell to select it, then press 1–9 on the keyboard or use the number pad to fill in a digit.
  2. Each row must contain every digit from 1 to N exactly once.
  3. Each column must contain every digit from 1 to N exactly once.
  4. Each sub-box (separated by thicker borders) must contain every digit from 1 to N exactly once.
Example

Click an empty cell, then type a digit 1–N to fill it.

Each row must contain every digit exactly once.

Each column must contain every digit exactly once.

Each sub-box (separated by thicker borders) must contain every digit exactly once.

Tip: use Backspace or 0 to clear a cell. Arrow keys move the selection.