This is the Monty Hall puzzle. It was named after Monty Hall, the host of the game show "Let's Make a Deal." The project has every part of the puzzle, and has been carefully tested to make sure there aren't any bugs. All instructions are in the project. HAVE FUN! :)
The Monty Hall puzzle belongs to it's creator. If you need more information on the Monty Hall puzzle, a page on Wikipedia has information on it under the name "Monty Hall problem" I'll explain the puzzle here: First, you are prompted to choose one of three boxes. One of these boxes has a prize, but you don't know which one. Secondly, one of the boxes that doesn't have a prize is removed. Note that the box you picked can't be removed. Then, you can choose to keep your box or switch it with the other remaining box. Finally, cross your fingers and hope you get the prize!