Questions tagged [lights-out]

A type of puzzle typically involving a grid of lights, in which the challenge is to get them all to the same state (on or off). The trick is that each light also affects a number of its neighbors, with sides and corners affecting fewer.

Filter by
Sorted by
Tagged with
4
votes
2answers
163 views

A generalization of the lights-out problem

Look here for the original problem. Let the set $J$ be the set of pairs of positive integers $(m,n)$ with $m\ge n$. Suppose $(m,n)\in J$. Then there are $m$ lights, which they are initially off. ...
1
vote
2answers
173 views

What's the name of this kind of puzzle? [closed]

Link to a video of a the puzzle What is this puzzle called, and if possible, what is the logic behind it? Clicking a square inverts the state of the square and the ones directly adjacent to it, and ...
17
votes
3answers
3k views

Is there any easy way to solve this lock puzzle?

https://js13kgames.com/games/lock-puzzle/index.html The link provides an online puzzle game of $16$ tiles in the form of a $4 \times 4$ matrix of which some entries are in the form of vertical tiles ...
3
votes
1answer
125 views

Fill 5 x 5 grid

In each cell of a 5 × 5 square there is a token that is black on one side and white on the other. Initially all tokens are placed with the white side facing up. On each move three tokens in ...
4
votes
2answers
446 views

I am struggling with a complex version of the “lights out” puzzle

Hello my fellow puzzlers. I am new to this holy land so if my question is not the kind you people like to solve, I apologize. As some of you may know, there is a puzzle named: "lights out" based on a ...
1
vote
1answer
278 views

Which Lightbulb belongs to the switch [duplicate]

There is an old house with an upstairs room and a downstairs room. the upstairs room contains 3 light bulbs and the downstairs room contains 3 switches. Each switch is connected to one light bulb. A ...
5
votes
3answers
1k views

Strategy for Modified Lights out

A friend of mine showed me a variation of lights out that they were interested in, and asked me if it would be possible to solve any given empty grid. This variation involves toggling not just the ...
4
votes
2answers
325 views

Is a game of Knight's out possible?

In lights out, there is a grid of cells (called lights) that can assume two states. All lights start off. You can toggle a given light, and it will automatically toggle its four neighbours. The aim of ...
2
votes
1answer
2k views

Grid based color changing puzzle

I am trying to identify the minigame used in the game Fontanero (the code for it is here). It consists of a 3x3 grid of squares, and each square is red or green. You can click on a square to invert ...
10
votes
2answers
543 views

Turn on all squares

Take a square grid of size $a\times b$, with all squares being off. You can tap a square, to reverse the state of that square and all squares located in the same column and row as the tapped square. ...
7
votes
6answers
1k views

Counter Flipping

A counter flip game is played in the following way: In each move, you can flip an entire row or column Flipping a row or column inverts all the counters on that row or column from $X$ to $O$ or vice ...
10
votes
1answer
428 views

Lights out game on a chessboard

Alice and Bob play a game with an 8×8 grid of lights, all initially on. They take turns choosing a light which is on and turning it off, with Alice going first. However, the grid is rigged such that ...
9
votes
2answers
276 views

Christmas light horror story!

Inspired by stories of strangely behaved Christmas lights here on Puzzling, I feel comfortable now to share my own Christmas light horror story. It all started when I ordered a grid of star lights on ...
5
votes
2answers
296 views

Putting up the lights two

I hope you are familiar with this. Basically Each strand of 20 lights is wired like a 5x4 grid, and each bulb can be either blue, red, purple, or green. However, when you change the color of 1 ...
9
votes
1answer
267 views

Putting up the lights

Feeling festive, you decide it's time to put up the lights. You dig out the box and plug a strand in. Uh oh, they are all the same color. This won't work, these are supposed to be multiple colors ...