Black Box

Black Box is an inductive reasoning game where you must deduce a hidden logic rule. You are given a fixed set of inputs; insert them into the "black box" one by one to see what comes out. Once you have seen the results, you must identify the correct rule from the multiple-choice options.

How a round works. Tap the "Insert" button to feed the next input into the box. Watch the output table update. Once every example is revealed, four possible rules appear · pick the one that explains every transformation.

Diverse rules. Rules range from simple arithmetic (like doubling a number) to string manipulations (reversing a word) and even emoji-based logic (swapping species or gender).

Part of PlayMemorize, a passion project from Christoffer De Geer. It runs entirely in your browser.