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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.

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2answers
180 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 ...
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1answer
174 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 ...
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3answers
562 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 ...
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2answers
302 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 ...
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1answer
964 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
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2answers
414 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. ...
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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
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1answer
373 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 ...
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2answers
245 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 ...
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2answers
275 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
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1answer
257 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 ...