🔗 GHZ Game
A team game that no classical strategy wins every round — with entanglement, you always do.
The real Qiskit code
The same game as an interactive Jupyter notebook — the quantum circuit runs on Qiskit, and you can change it.
Opens a free Jupyter session on mybinder.org (via QuBins) — starting it can take a few minutes
git clone the repository, create the conda environment from environment.yml, and open GHZ-Game.ipynb.Three players — Alice, Bob, and you — each receive a question and must answer without communicating. The rules are set up so that the best classical team strategy wins at most 75% of the rounds. Sharing three entangled qubits in a GHZ state, your team wins every single round.
This is not a trick and not statistics: it’s a game version of the experiments that ruled out “local hidden variables” as an explanation of quantum mechanics. The notebook walks you through playing the game, building the GHZ state with a few gates, and checking that the quantum strategy really is unbeatable.