Mystery Chip

The black box is one of the six chips below, a boolean function of three inputs. Set the inputs, probe it to read the output, and watch the impossible candidates drop away. Identify it in as few probes as you can. A new chip every day.

How it works

Each candidate is a named logic function, so if you know your gates you can predict what it should output. Pick inputs where the candidates disagree, and a single probe can rule several out at once. That is exactly how you debug real hardware: apply the input that best splits your hypotheses. Come back tomorrow for a fresh chip and keep your streak alive.

More at Logic Games, or learn the gates for real in the hands-on course.