Lights Out

• Classic toggle-grid logic puzzle
• Neighbor-toggling mechanics
• Escalating grid sizes
• Pre-set challenge patterns
• Clean, minimalist board

• Plan several moves ahead — each tap toggles its neighbors too.
• Work from one corner outward to avoid undoing progress.
• Remember that tapping the same cell twice cancels out.
• Look for patterns in how cells and neighbors interact.
• Use larger grids to practice systematic solving.

Lights Out is the timeless logic puzzle distilled into a clean browser package, asking you to extinguish every cell on a grid where each tap toggles its neighbors. The deceptively simple rule produces puzzles that escalate quickly, forcing you to plan moves several steps ahead to avoid undoing your own progress. Larger grids and pre-set patterns turn the later boards into genuine brain workouts that mathematicians and casual players alike can sink into. Minimal visuals keep focus on the grid logic. A perfect quick-session puzzle for fans of classic logic games and anyone hunting that satisfying click when the last light finally goes dark.