Lights Out

Toggle lights in a cross pattern to turn them all off.

Lights Out gameplay

How to Play

The grid starts with some lights on and some off. Toggling a cell flips that cell and its four orthogonal neighbors (up, down, left, right). The goal is to turn every light off.

Controls

Key	Action
Arrow keys / WASD / hjkl	Move cursor
Mouse left-click	Toggle light
`Enter` / `Space`	Toggle light
`Ctrl+R`	Reset puzzle
`Ctrl+H`	Toggle full help
`Escape`	Return to main menu

Modes

Mode	Grid	Description
Easy	3x3	Small grid
Medium	5x5	Classic size
Hard	7x7	Large grid
Extreme	9x9	Maximum size

Elo Difficulty

Named modes are compatibility presets. Use --difficulty <0..3000> to target a specific Elo difficulty for generated puzzles.

Quick Start

puzzletea new lights-out easy
puzzletea new lights-out medium
puzzletea new lights-out extreme