Pick a door
Session results
Stayed
0
Switched
0
Win % when staying —
Win % when switching —

Results reset on page reload

The Monty Hall Problem

  • Try to guess which door wins you the car, and avoid winning a goat!

What to do!

3 doors:

  • After making your first choice, the game reveals one door with a goat.

9 doors:

  • After making your first choice, the game reveals 7 doors with goats.

  • The door you selected and one other remains. Your given the chance to switch.

  • Should you take the switch, or does it not matter? Why?

  • Play again to build data on games won by staying with your choice or taking the switch.

  1. Press on a door to make your first selection.

  2. Press one of the two remaining doors (or press on the buttons labelled “stay” or “switch”) to lock in your choice.

  3. Press any door after the result to try again.

  4. Build up data on the percentage of games won when you stay or switch.

  5. Is one method better? Why?

Instructions:

The HTML code for this demo was generated by AI (Claude). If you are a game/website designer and would like to work with us, please reach out!