Three stars per row, column, and region on a 14 × 14 grid — the expert end of Star Battle. These are long solves: expect layered counting arguments, region chains that only crack after you've pinned down a whole band of rows, and plenty of pencil-mark discipline.
Every board here is verified to have exactly one solution reachable by pure logic — no guessing required, however deep the deduction runs. Warm up on 10 × 10 if you're new to multi-star boards.