Switchlight Lab
By @张海威ios-prod
Flip rows and columns of lights to turn the entire grid from amber to blue in this logic puzzle.
How to play
- Look at the grid to see which lights are amber and which are blue.
- Tap a lettered or numbered switch to flip that entire row or column.
- Watch how intersecting lights change color when you flip a line.
- Continue flipping lines until every single light on the board is blue.
Controls
- Touch
- Tap the edge switches to flip rows and columns.
- Keyboard
- Not supported.
- Mouse
- Click the edge switches to flip rows and columns.
More about this game
Your goal is to calibrate the optics board by turning every light blue. You do this by pressing the switches on the edges of the grid, which flips the color of that entire row or column between amber and blue. The difficulty increases across the six chambers as the grids expand from 3x3 to 4x4 with more complex starting patterns. A chamber ends when all lights are blue, and you can try to match the optimal move count.
Tips
- Check the optimal move count before you start. If it says 1 or 2 moves, look for the exact lines that intersect the amber lights.
- Flipping the same row or column twice just reverses your action. Use the undo button if you make a mistake to save your move count.
- Pay attention to the intersections. Flipping a row will change the state of a light you might have already turned blue in a column.
Questions
How many levels are there?
There are exactly 6 chambers to solve. The first three are played on a 3x3 grid, and the final three expand to a larger 4x4 grid.
What does the optimal number mean?
The optimal number shows the absolute minimum number of moves required to turn all the lights blue. If you match this number, you achieve a perfect calibration.
Can I fix a wrong move?
Yes, you can use the Undo button at the bottom of the screen to reverse your last flip. This will also subtract one from your total move count.