💡 Lights Out

Lights Out is the classic toggle puzzle. Pressing a cell flips it and its four neighbours — the goal is to turn every light off.

How to play

1. Tap a lit cell to flip it and its neighbours.
2. Moves are unlimited; think about which cells each tap affects.
3. Clear the board to finish — time is your score.

Strategy tips

• Chase the lights: work row by row, pressing the cell below any lit cell to switch it off.
• Whatever remains on the last row tells you whether the chase was right — reset and adjust if it was not.
• Every board is solvable, so an impossible end state means a wrong move, not a broken puzzle.

FAQ

Is every board solvable?

Yes — boards are generated from a solved state by applying real moves.

Do moves run out?

No — moves are unlimited; only the clock counts.

Is there a reliable method?

The row-by-row "light chasing" technique solves most boards mechanically; harder boards test how you handle the final row.

Difficulty affects grid size and time is your score — finish fast, post to the daily leaderboard, or race a friend.

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