🎯 Bulls and Cows (Rust + egui)

A weekend project that turned into a proper little game. Classic Bulls and Cows (a.k.a. Mastermind with digits)… but with a bot that can play against you — or help you cheat against the bot. 😏

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📸 Screenshots

• Game board:

• Bot duel:

• Human against BOt:

• Bot assist:

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🕹️ How to play

• Secret password = 4 unique digits.

• Each guess gets scored:

  • 🎯 = correct digit & correct place
  • 🎪 = correct digit, wrong place

• First to crack the code wins!

You can play vs the bot, or let the bot “assist mode” you while you claim the glory.

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🤖 How the bot works

The bot isn’t super fancy.

• It generates all 10P4 possibilities.
• After each guess, it filters the list based on feedback.
• Then it just picks the first valid candidate.

That’s it. No deep math, no magic. Just pure Rusty persistence.

Still — it usually wins in ~7 guesses. 🏆

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🚀 Running

cargo run --release

Requires Rust 1.86+ (probably works with earlier).

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🔮 Roadmap / Ideas

• Smarter strategies (Knuth’s 5-guess, anyone?)
• Prettier UI (animations, scoreboard, etc)
• Fix CPU hogging (egui re-renders every frame — I’ll get to it 😅)

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🤝 Contribute

Open PRs, file issues, or just fork and hack. Half the fun is seeing how you would make the bot smarter.

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📝 License

MIT — have fun with it.