Gate Logic
A robot door should open only for the switch patterns on the truth table. Drop AND, OR, XOR and NOT chips into the circuit and watch every row light up green or red at once.
Play nowHow to play
Controls
TapDragKeyboardSpace- Drag a gate chip from the tray onto an empty socket, or tap a chip and then a socket.
- Two-pin sockets take AND, OR, XOR, NAND and NOR; one-pin sockets take NOT or WIRE.
- Tap a placed chip to take it back for free.
- Each placement costs a spark, so a red row means take something out.
- Tap a row to trace it through the wires.
- Keys: Left/Right socket, Up/Down chip, Space place, H hint.
About the game
Gate Logic is a circuit puzzle about the little decisions inside every computer. A robot is waiting behind a door, and the truth table on the right says exactly when that door must open: for which patterns of the A, B and C switches. The circuit is already wired. Your job is to choose which logic gate goes into each empty socket, using only the chips in the tray.
The twist is that the table is alive. Every row has its own lamp, and all of them update the moment you drop a chip in, even on a half-built board. An AND gate with one dark input is dark no matter what you add later, so a wrong chip can turn a row red straight away, and that row stays red until the chip comes out. Read the red rows, tap one to trace it through the glowing wires, and swap the culprit before you run out of sparks. Twenty-four boards add NOT and plain wire, XOR, a third switch, decoy chips and finally NAND and NOR.
Free to play in your browser. No download, no sign-up. Best on a computer, or a phone held sideways. Your progress is saved on this device.
