Solving Mastermind with Maximum Entropy

Published: 3 hours ago (March 9, 2026 at 09:40 PM EDT)

1 min read

Source: Dev.to

Overview

The idea is to choose guesses that give the most information and reduce the number of possible codes as fast as possible.

With this method the code can be solved in about 4.42 guesses on average across all 1296 possible codes.

Topics Covered

How Mastermind feedback works
Why some guesses are more informative
How entropy helps choose the next guess
How the solver works

Mastermind Entropy Article

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