How to Solve this ´3-Digit Number Lock Puzzle´ Game:
Mark forbidden digits. Any clue that says “Nothing is correct” eliminates all 3 digits from the code.
Collect “in-code” digits. Clues that say “One number is correct …” or “Two numbers are correct …” tell you which digits must appear in the code (but watch their positions!).
Build position rules.
Right place ⇒ that digit is fixed in that position.
Wrong place ⇒ that digit cannot be in that position.
Use the 2-correct-wrong-place clue. It gives you two exact digits of the code and forbids their shown positions.
Test candidates. Try only 3-digit combinations using the allowed digits and positions. Each candidate must satisfy all clues simultaneously.