Do you want an app that solves a Mastermind-style code for you? Sit back and watch it guess any code in six tries or less!

Automatic Mode: Pick a code and press "Auto-guess!" We promise this program doesn't cheat, but if you really want to be impressed, check out the manual mode.

Manual Mode: Ask a friend to write down four digits from 0 to 5, then take out your app and just enter in the number of black and white pins for each guess. Before you know it, your friend's code has been cracked.

NOTE: In this app you are the code maker, not the code breaker.

How it works: This app is built on the principle of entropy. Entropy is a measurement of the unpredictability of a random outcome. Fast Mastermind Solver makes a guess at every turn that tries to maximize this unpredictability, so it can narrow down the possibilities until there is only one left: your secret code.