Lights Out Solver row chasing
For each possible first-row click pattern, the solver forces clicks in lower rows whenever the cell above still differs from the target. This covers all legal solutions for the selected board size.
Free Online Lights Out Solver
Solve Lights Out boards one click pattern at a time.
This Lights Out Solver combines Toggle Puzzle Solver and Light Switch Puzzle Solver workflows on one page. Enter the abstract board manually, choose whether the target is every light off or every light on, then inspect the click order, click count, every step, final board, and no-solution result.
Lights Out Solver — enter a 3×3, 4×4, or 5×5 toggle board
Click cells to mark which lights are currently on. The Lights Out Solver tries every first-row click pattern, follows the forced row-by-row toggle rules, and returns the shortest click solution when one exists.
Lights Out Solver input
Manual light board
On Off
Tap a cell to switch its starting state. Yellow cells are on; dark cells are off.
Lights Out Solver boundaries
This Lights Out Solver does not do screenshot recognition, game-screen recognition, camera input, image uploads, OCR, or automatic clicking scripts. It only solves an abstract board after you enter the light states by hand.
Lights Out Solver results
Solvable
Not checked
Click count
0
Target
All off
Enter a board and solve to see the initial board, click order, click count, every step, final board, and no-solution status.
Initial board
Final board
Click order
Every step
Lights Out Solver workflow for toggle puzzle boards
One Lights Out Solver page covers Lights Out, Toggle Puzzle Solver, and Light Switch Puzzle Solver use cases without splitting the same board logic into separate tools.
Lights Out Solver manual board input
Choose 3×3, 4×4, or 5×5, then tap each cell to match the lights you see in the abstract puzzle. No image upload or screen reading is involved.
Lights Out Solver click sequence
The result area shows the initial board, click order, click count, every board after a click, and the final board for the selected all-off or all-on target.
Lights Out Solver browser-only boundary
The Lights Out Solver stays focused on abstract toggle math. It does not recognize screenshots, identify game graphics, or run automatic click scripts.
How the Lights Out Solver works
The Lights Out Solver uses the standard plus-shaped rule: clicking a cell toggles that light plus its up, down, left, and right neighbors.
Lights Out Solver target modes
You can solve toward all lights off or all lights on. The same click toggles are applied, but the final board check compares every cell with the selected target state.
Lights Out Solver no-solution checks
Some toggle boards cannot reach the requested target. When no first-row pattern produces a valid final row, the Lights Out Solver reports no solution instead of inventing clicks.
Lights Out Solver input guide
Use these tips to prepare a Lights Out, Toggle Puzzle Solver, or Light Switch Puzzle Solver board before solving.
01
Choose the Lights Out Solver board size
Select 3×3, 4×4, or 5×5 to match the abstract puzzle you want to solve. The board immediately resizes while keeping the input fast on mobile.
- Use 3×3 for small tutorial puzzles
- Use 5×5 for the classic larger Lights Out layout
02
Enter the Lights Out Solver light states manually
Tap each cell until the pattern matches your puzzle. Yellow means the light is on; dark means the light is off. The tool does not read screenshots or game windows.
- Use invert when you entered the opposite state
- Use the sample to see how click order and steps are displayed
03
Review the Lights Out Solver result
Read the click order, then inspect the step timeline to see how each click changes the board. If the result says no solution, the entered board cannot reach the chosen target under the standard toggle rule.
Click order is shown as row and column coordinates. Because Lights Out toggles commute, the same set of clicks can usually be pressed in any order, but the displayed order makes the step timeline easy to verify.
Lights Out Solver FAQ
Common questions about Lights Out Solver board sizes, click rules, no-solution results, privacy, and screenshot-recognition boundaries.
Does this Lights Out Solver also work as a Toggle Puzzle Solver?
Yes. This single Lights Out Solver handles the common toggle-puzzle rule where clicking a cell flips itself and its orthogonal neighbors. It also covers Light Switch Puzzle Solver searches that use the same abstract board logic.
Which board sizes does the Lights Out Solver support?
The Lights Out Solver supports 3×3, 4×4, and 5×5 boards. Those sizes cover small tutorial boards, many mobile toggle puzzles, and the classic Lights Out-style grid.
Can the Lights Out Solver turn all lights on instead of off?
Yes. Use the target selector to solve toward all lights off or all lights on. The click order and step timeline update for the selected target.
Why does the Lights Out Solver say no solution?
Some starting patterns cannot reach the chosen target under the standard plus-shaped toggle rule. The Lights Out Solver checks every possible first-row pattern and reports no solution when none reaches the final board.
Does the Lights Out Solver find the fewest clicks?
For the supported 3×3, 4×4, and 5×5 boards, the Lights Out Solver evaluates all first-row patterns and chooses the valid solution with the smallest click count.
Can the Lights Out Solver read a screenshot or game screen?
No. This Lights Out Solver does not perform screenshot recognition, game-screen recognition, image upload, OCR, camera input, or automatic click scripting. Enter the abstract board manually.
Are my Lights Out Solver boards uploaded?
No. Board input, row-chasing search, click sequence generation, no-solution checks, and step rendering all run in front-end browser JavaScript after the page loads.
Try another free tool after the Lights Out Solver
SolverBox keeps the Lights Out Solver focused on abstract toggle boards, while other tools handle Sudoku, Nonogram, Hashi, Minesweeper, and word puzzles.
After using this Lights Out Solver, browse all free puzzle solvers for more logic, number, word, and game helpers.
No account required — enter a Lights Out board and solve it in your browser.