W, by hand, within tolerance
Build the three-qubit W state yourself — one excitation shared equally, so |001⟩, |010⟩ and |100⟩ each near 33.3% and every other bar at zero — using only gates you place. The repair challenge handed you the awkward angles; this time the θ slider's π/16 steps are all you get, and 1/3 is not exactly reachable with them: sin²(3π/16) ≈ 30.9%, not 33.3%. The tolerance is 3%, and the slider can get every bar inside it. The zeros are NOT tolerant in spirit: any recipe that leaks probability onto |000⟩, |111⟩ or the two-excitation states will fail long before the thirds do. Par is 10.
Stuck on the concept? Read Entanglement.
Select a gate to see what it does, then tap a wire — or Tab to a wire and press Enter — to place it.
Pick a gate, then tap a cell — or Tab into the grid and use the arrow keys and Enter — to place it.
Generate a fresh target state drill at this difficulty. Every generated puzzle is verified solvable by execution before you see it — the generator runs its own solution through the same simulator and grader that will judge yours.