1# Lights Out23Toggle lights in a cross pattern to turn them all off.4567## How to Play89The grid starts with some lights on and some off. Toggling a cell flips10that cell and its four orthogonal neighbors (up, down, left, right). The11goal is to turn every light off.1213## Controls1415| Key | Action |16|-----|--------|17| Arrow keys / WASD / hjkl | Move cursor |18| Mouse left-click | Toggle light |19| `Enter` / `Space` | Toggle light |20| `Ctrl+R` | Reset puzzle |21| `Ctrl+H` | Toggle full help |22| `Escape` | Return to main menu |2324## Modes2526| Mode | Grid | Description |27|------|------|-------------|28| Easy | 3x3 | Small grid |29| Medium | 5x5 | Classic size |30| Hard | 7x7 | Large grid |31| Extreme | 9x9 | Maximum size |3233## Elo Difficulty3435Named modes are compatibility presets. Use `--difficulty <0..3000>` to target a36specific Elo difficulty for generated puzzles.3738## Quick Start3940```bash41puzzletea new lights-out easy42puzzletea new lights-out medium43puzzletea new lights-out extreme44```