💡

LIGHT UP

Place bulbs to light every cell — and no bulb lights another.

Your Logic rating

—

Rank

Unranked

Difficulty · hard

Friday, September 11

Today's grid is 10×10. Light every white cell; numbered walls tell you how many bulbs sit beside them.

1v1 Ranked →

Same puzzle, race a real player. Moves your rating.

Practice →

Unlimited random puzzles. No rating, no pressure.

How to play →

Learn the rules in under a minute.

Strategies →

Techniques to solve faster.

Archive →

Replay the last 30 days of dailies.