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Lights-out logic puzzle

Light Grid

Put the restless windows to sleep.

0 pts

Choose Let’s play to start your round.

A FEW LITTLE POINTERS

How to play

Tap a window to flip it and its four neighbors. Turn every light off. Arrow keys move the cursor; Space or Enter flips. Hint highlights a useful switch and costs three turns. Reset restores this circuit and costs three turns.

Solve all five circuits.

Pause whenever you need. Switching tabs pauses play; choose Resume when you return. Leaving or reloading starts a fresh round.

Tips & game details →

LEAVE A LITTLE MARK

The top five

Highest points wins. Winning the challenge and ending an attempt are counted separately.

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Your name on the board

1–6 visible characters. Your name and score will be public.

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