Twenty-five amber squares, some glowing, some dark. Tap one and it flips, but so do the squares above, below and to either side. Your aim is a completely dark board, and doing it in few moves is the real test.
Light Switch Grid unblocked comes from Tejas Wavde's open-source set of browser games. It has a retro terminal look, a built-in help page and a fresh daily board at each level.
How to play Light Switch Grid
Pressing a cell switches it and its side neighbors to the opposite state. Diagonal cells stay as they are, and cells on the border just have fewer neighbors to flip. A status line shows how many lights remain, and a counter tracks your presses.
Choose Easy, Medium or Hard. Each level opens on a daily puzzle picked from the UTC date, so everyone gets the same board until the date rolls over. Press new for a random board. Undo steps back one press, and reset returns the board to how it began.
Darken the final light and you see your total move count. If that beats your record for the level, it becomes your new Best.
Controls
| To… | Keyboard | Mouse | Touch |
|---|---|---|---|
| Press a cell (flips it and its side neighbors) | — | Click the cell | Tap the cell |
| Take back the last press | — | Click "undo" | Tap "undo" |
| Return to the starting pattern | — | Click "reset" | Tap "reset" |
| Pick a difficulty or roll a random puzzle | — | Click Easy, Medium, Hard or "new" | Tap Easy, Medium, Hard or "new" |
| Open or close the help page | Esc or Q closes it | Click "? man", then the × or outside the box | Tap "? man", then the × or outside the box |
Tips
- Clear it row by row. For each lit cell in the top row, press the cell right under it. Repeat down the board until only the last row has lights.
- Use the leftovers. The pattern left in the bottom row tells you which top cells to press. Press them, then sweep down again.
- One press per cell is enough. Pressing a cell twice undoes itself, so it only adds moves.
- Order doesn't matter. Only the set of cells you press counts, not the sequence, so plan freely.
- Reset beats spamming undo. If a sweep goes wrong, reset jumps back to the start and clears your count.
Light Switch Grid questions
Can every board be solved?
Always. The game builds each board by pressing random cells on a blank grid (3 on Easy, 6 on Medium, 10 on Hard), so repeating those presses clears it.
Why is the puzzle the same when I come back later?
The first board at each level comes from today's UTC date. It changes tomorrow, or you can press new for a random one now.
Are my best scores saved?
Yes. Your fewest moves for each level, plus the level you last picked, are kept in the browser.
