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LIGHTS-OUT
lit5moves0/5
LIGHTS-OUT
Level 03 · No Corners. The edges join, so the board has no corners and no edge to start chasing from.
- 01Tap any cell. It flips itself and the four cells touching it.
- 02The edges are joined: the top row touches the bottom, the left column touches the right.
- 03Every light must end up off. Order never matters, and pressing twice cancels again.
about this game
LIGHTS-OUT, Every light must go out.
A 4x4 grid of lights. Tapping one advances it and its four neighbours, and every cell must end at zero. Underneath it is linear algebra over a finite field, which is why order never matters. Each level changes one term of that system: the arithmetic the cells count in, or the shape they are laid out on.
how to play
- 01Tap any cell. It flips itself and the four cells touching it.
- 02Every light must end up off.
- 03Order never matters. Only which cells you press, and how many times.
levels
- Level 01 · First Lightpar 4
A four-press solution, reachable by eye.
- Level 02 · Third Statepar 6
Cells now hold three states, so pressing twice no longer cancels. It takes three.
- Level 03 · No Cornerspar 5
The edges join, so the board has no corners and no edge to start chasing from.
controls: Tap a cell to advance it and its neighbours
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