Master quantum gates by solving increasingly complex circuits.
Place quantum gates to achieve the target state. Use hints if you get stuck.
Create an entangled Bell state. Place a Hadamard gate on qubit 0, then a CNOT with qubit 0 as control targeting qubit 1. Both |00⟩ and |11⟩ must exceed 45% probability.
Use destructive interference to cancel the |01⟩ state and concentrate amplitude on |10⟩. Reach > 70% probability on |10⟩.
Use Grover's algorithm to amplify the marked state |11⟩ to over 80% probability with just 1 oracle + diffusion pass.