Place exactly 1 star(s) in every row, column and bold-outlined region. Stars may not touch, not even diagonally. Grey cells are givens (★ star, · empty). Click a cell to cycle: empty → ★ → ✕ (your own mark) → empty.
Difficulty: hard — the SAT solver could strip 62 of 64 givens (uniqueness proved, 2 givens remain).