Tumblers 3D simulates the intricate mechanical feedback of dialing a heavy brass safe lock. Solvers must deduce a secret 4-digit code within four attempts using color-coded status pins and acoustic cues.
1. Spread-Spectrum Opening Probes
Never open with numbers close together (like 1-2-3-4). Dial widely separated digits—such as 0-3-6-9—on your first attempt. This spans the entire base-10 numerical spectrum and immediately reveals presence indicators with zero overlap.
2. Permutation Pin Tracking (Bulls & Cows)
Green Pin (Exact): The digit is correct and in the exact cylinder. Lock that dial permanently!
Yellow Pin (Misplaced): The digit exists in the secret code but belongs in a different cylinder. Shift it to an adjacent dial on your next attempt.
Dark Pin (Wrong): The digit does not exist in the code. Eliminate it entirely from future guesses.