Tilt the coin
A fair coin is one particular superposition; you can dial any other. Build a single-qubit circuit that reads |1⟩ about 15% of the time and |0⟩ the rest — one gate, one angle. The θ slider moves in steps of π/16, and one of those stops lands within a fraction of a percent of the target.
Stuck on the concept? Read Superposition & Measurement.
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 distribution 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.