Start > 🛠️ Werkzeuge > Mind Reader AI — Code-Breaking Bot

🧠 Mind Reader AI — Code-Breaking Bot

Set a secret 4-colour code and watch the AI crack it. Using Knuth's minimax deduction — the algorithm behind Mastermind solvers — it starts from 1296 possible codes and rules out every one inconsistent with the feedback, reading your mind in five guesses or fewer, every single time.

Set your secret code

Your code:

🎓 How the AI thinks

Starts with all 1296 possible codes as candidates
Each guess yields feedback: ● exact matches and ○ right colour, wrong spot
It discards every candidate that would not produce that same feedback
The candidate set shrinks fast — the last one standing is your code

❓ Frequently Asked Questions

Is this real AI?

Yes — it is classic constraint-satisfaction AI (the same deduction used by Mastermind-solving algorithms), running entirely in your browser with no server or large language model.

How does it always win?

After every guess it eliminates all codes inconsistent with the feedback. The possibilities collapse from 1296 toward 1, so it provably cracks any code in a handful of guesses.

Is it free?

Yes — 100% free, no download and no sign-up, playable on phones and desktops.