Watch the cups shuffle and guess which one hides the ball.
Press Start to begin.
The shell game (also known as the cup-and-ball trick or thimblerig) is one of the world's oldest confidence games, dating back to ancient Greece. Our digital version is 100% fair — the ball is placed randomly, the cups shuffle in plain sight, and there are no sleight-of-hand tricks. It's a great way to test your visual tracking skills at three difficulty levels.
Easy, Medium, and Hard control how many swaps happen and how fast the cups move.
CSS transitions make the cups glide naturally so you can follow the ball — if you're quick enough.
Wins, losses, win percentage, and your best streak update in real time.
No tricks — the ball stays exactly where it should. The challenge is purely visual.