GOAL
Solve as many 3×3 Lights Out boards as possible within 60 seconds. Each board you clear scores points, and leftover time adds a bonus at the end.
RULES
- Tap any cell to toggle it and its orthogonal neighbours.
- Turn all lights off to clear the board. A new one appears immediately.
- The timer keeps running — every second counts.
SCORING
100 pts per board solved + 5 pts per second remaining when time runs out.
Why this sharpens your mind
SPEED AND ACCURACY
Solving under time pressure trains the brain to reach correct decisions faster — the same skill used in sports, trading, and emergency situations.