Introduces the problem and tries to look at the problem in a new light.

Fully HTML-based simulator for the problem. All on one page.

Dr Math answers a reader question and explains why the puzzle works the way it does.

Comments on Marilyn vos Savant response to the question about this problem.

Simulator. Uses buttons as labels and controls. Counts tries and provides percentages. Can be Reset without page refresh.

Introduction to the problem and the controversy. As well as a simulator. Contains a link to the next page which explains the maths behind the problem.

Contains a introduction to the problem, a hint to the solution and the solution. The author attempts to "provide a reasonable and clear explanation of the answer".

Gives 4 explanations of the solution to this problem.

Includes the original question posed to Marylin vos Savant about the problem, a simulator, solutions and other information on the problem.

Short introduction for beginners.

Simulation of the 3-door problem in Flash, along with a brief discussion.

Thorough discussion of the problem, with solutions explained.