Is every daily board solvable?

Yes, each puzzle is algorithmically generated to guarantee at least one solution.

Can I replay yesterday's puzzle?

No, the board changes at midnight local time and previous layouts are not archived.

Does the game save my streak across devices?

Progress is stored in your browser's local storage, so switching browsers or clearing cache will reset the streak.

Are there hints or an undo button?

The game intentionally omits hints and undo to keep the challenge pure; a restart button clears the board instantly.

Daily puzzle · New pattern at 00:00 UTC

Lights Out

Tap a light to toggle it and its four neighbours. Switch every light off. Today’s pattern is always solvable.

Moves: 0 Lights on: 0 Daily streak: 0

Tap a cell to toggle it and its neighbours.

How to play

Each tap flips the cell you touch plus the cells directly above, below, left and right of it. The goal is a completely dark board in as few moves as possible. The daily pattern is generated from random presses of a solved board, so a solution always exists. Your move count and streak stay only in this browser. Keep going with Memory Match, Sliding Puzzle or Word Scramble.

About

Lights Out presents a fresh 5x5 grid of illuminated and dark squares every day. Tapping any square toggles its state along with the four orthogonal neighbors, so each move ripples across the board. The goal is to extinguish every light in as few taps as possible, turning the whole grid dark before the timer resets at midnight.

Each daily puzzle is generated with a guaranteed solution, meaning no configuration is impossible to clear. The game tracks the number of moves you make and the elapsed time, letting you compare today's performance with previous days. Because the board resets globally, everyone works on the identical pattern, creating a shared challenge without leaderboards or accounts.

How your result is scored

Your result is expressed as two numbers: total taps used and seconds elapsed from first tap to the moment the last light goes out. Fewer taps indicate a more efficient solution path, while a lower time reflects quicker pattern recognition and execution.

There is no pass or fail threshold; the score simply records how you approached that day's layout. Comparing your tap count to the theoretical minimum for the same board can show whether you found an optimal sequence, and watching your average time trend over weeks reveals improvement in visual processing speed.

Tips to improve

Work from the top row downward; decisions on row one determine the only viable presses for row two.
Memorize the five basic 3x3 toggle patterns that clear common corner and edge clusters.
Pause after the first pass to scan for stray lights before committing to a second sweep.
Use the move counter as a feedback loop — if it exceeds 20 early, restart rather than chase a messy board.
Play at the same time daily to build a consistent mental rhythm for pattern spotting.

Frequently asked questions

Is every daily board solvable?: Yes, each puzzle is algorithmically generated to guarantee at least one solution.
Can I replay yesterday's puzzle?: No, the board changes at midnight local time and previous layouts are not archived.
Does the game save my streak across devices?: Progress is stored in your browser's local storage, so switching browsers or clearing cache will reset the streak.
Are there hints or an undo button?: The game intentionally omits hints and undo to keep the challenge pure; a restart button clears the board instantly.