How to play XOR Grid
Every selected square switches its whole row and column between on and off. The square where they cross switches once. Your goal is to leave the entire board dark. Boards are created by making legal moves from a dark board, so every new puzzle has a solution. There may be more than one route to a clear board.
Choose your difficulty
| Level | What changes |
|---|---|
| Easy | 3 × 3 board. |
| Medium | 4 × 4 board. |
| Hard | 5 × 5 board. |
Controls
Click or tap a square to switch its row and column. Use Hint to see a useful next move, Reset to retry the same board, or New puzzle for another arrangement.
A tip for your first round
Watch the entire row and column before choosing a square. A move is its own inverse: selecting the same square twice restores the previous board.
Play without installing anything
This version of XOR Grid plays in a modern browser. Follow the controls above and use a keyboard or the on-screen buttons where available. No account or payment is required. Any supported scores or progress are kept on this device, rather than synced to an account.
XOR Grid questions
Which lights does a move change?
All squares in the selected row and column switch once, including the selected square.
Is every puzzle solvable?
Yes. Boards are generated using valid moves from an all-dark board.
Read the XOR Grid playing guide or browse more puzzle games.
