Lights Out looks simple — turn off all the lights — until you try. Every tap toggles the tile plus its four neighbors, so what looks like a single move actually flips five tiles. Beginners feel like they're chasing their own tail. Once you learn one technique called "light chasing," this tricky puzzle becomes almost trivial. This guide explains how to solve Lights Out step by step, and you can practice on our free Lights Out game as you go.
The board is a 5×5 grid of lit and unlit tiles. Tapping any tile toggles itself and its immediate up/down/left/right neighbors. Corner tiles toggle 3 tiles total. Edge tiles toggle 4. Interior tiles toggle 5. The goal: every tile off.
This is the technique that turns Lights Out from tricky to trivial.
Ignore the top row for now.
For every lit tile in the top row, tap the tile directly below it in row 2. That "chases" the light down — the top row now shows what row 2 previously looked like, and the old lit tiles turn off.
Repeat for row 2 → row 3, row 3 → row 4, row 4 → row 5. Now only the bottom row is lit (or off entirely).
Look at the pattern in row 5. If it's all dark, you're done.
If not, match the row 5 pattern to one of six "parity fix" patterns (see below), tap those tiles in the top row, then repeat light chasing from step 2. This time everything clears.
If chasing leaves lights in row 5, tap this in row 1 (columns 1–5, where 1 = tap):
Yes — memorize these six patterns and you can solve every Lights Out board in under 60 seconds.
Don't undo moves — Lights Out is symmetric, so tapping the same tile twice cancels. Beginners waste half their moves on accidental undos.
Focus on the top-left corner first as your reference point. It's the last tile you should worry about.
Track lit tiles per row. If row 3 has 5 lit tiles, that means row 4 needs 5 taps to clear row 3.
Practice light chasing on easy patterns before tackling hard boards.
Lights Out has two properties that make a method possible. Pressing a tile twice is the same as not pressing it, and the order of presses does not matter. So every solution is just a set of tiles, each pressed once or not at all.
Light chasing uses this: pressing the tile directly below each lit tile clears that row without disturbing rows above, so the whole board reduces to the bottom row. The bottom-row pattern then tells you which top-row tiles to press before chasing again. Mathematicians showed that the classic 5×5 board can be described with linear algebra over two values (on and off), and that only one quarter of all possible 5×5 starting patterns can be solved (Anderson and Feil, Mathematics Magazine, 1998). Puzzles in our Lights Out game are always generated from solvable positions.
Beginner
Never press a tile in the top row while chasing. Chase downwards only.
If the bottom row is not one of the known patterns, you probably made a slip; reset and chase again.
Intermediate
Memorise the most common bottom-row patterns so you can recognise them without the table.
Count moves. A tidy solution rarely needs to press any tile twice.
Advanced
Try to spot presses that clear several lights at once before you start chasing; it cuts the move count.
Move on to Tile Slide or Binary Puzzle for other parity-based puzzles.
The best way to internalize light chasing is to actually chase lights. Try our free Lights Out puzzle — no signup, no download.
Also try these related logic puzzles:
Logic Grid — classic deduction
Codebreaker — deduce the hidden code
15 Puzzle — sliding-tile spatial logic
Sudoku — number placement logic
Pattern & Codebreaker Games Guide
10 Logic Puzzle Tips That Actually Work
Every tile toggle affects a plus-shaped pattern (itself + 4 neighbors). Because each move is its own opposite, the puzzle has a mathematical solution: solve the top row by choosing the correct tiles in the row below, then repeat. This 'light chasing' technique solves most Lights Out boards deterministically.
No. On a standard 5×5 board, exactly 4 out of 8 possible top-row states after chasing are solvable. If chasing leaves an unsolvable state, adjust the very first row using one of a small number of known 'parity fix' patterns.
It's tricky. The plus-shaped toggle pattern is unintuitive, so beginners feel like they're going backwards. Once you learn light chasing (about 15 minutes), Lights Out becomes very solvable and even relaxing.
Lights Out trains spatial reasoning, working memory, and planning. Because every move ripples in a fixed pattern, you're forced to plan several moves ahead — exactly the executive function that fades first with aging or heavy screen use.
No. On the classic 5×5 board only a quarter of all possible starting patterns can be solved. Well-made games, including ours, only generate solvable boards.
Chase the lights down row by row, read the pattern left in the bottom row, press the matching top-row tiles and chase again. Once you know the patterns, any solvable board falls in a couple of passes.