Lights Out is a puzzle where the aim is to switch off every light. In the common square-grid version, pressing a cell toggles that cell and its immediate neighbors above, below, left and right. Cells beyond an edge are unaffected. Check the instructions first: board shapes and toggle rules can differ.
Chase the lights down the board
- Look at the top row. For each lit cell, press the cell immediately below it to switch that top-row light off.
- Repeat for the next row, working downward. Each press addresses the light immediately above it.
- After the bottom row, check whether all lights are off. If not, reset and try a different initial combination of presses in the top row.
This process keeps completed upper rows organized, but it does not guarantee every possible starting board is solvable. The result depends on the board and its rules.
Keep track of your moves
Make a note of the cells you press. Pressing the same cell twice restores that cell and its affected neighbors to their previous states. Try a small board first and observe which lights change.