Should you stick with your first choice or switch doors?
Automated Simulation
Watch thousands of games play out automatically to see mathematical truth emerge
Choose strategy: Always Stay, Always Switch, or Random
Run up to 1000 rounds with 3-100 doors
Visualize probability convergence in real-time
Start Simulation
Manual Play
Experience the puzzle yourself by making your own choices and decisions
Click doors to make your own choices
Decide yourself: stay or switch after reveals
Track your intuition vs mathematical truth
Start Playing