Nurikabe — Island Logic Puzzle

Nurikabe is a classic logic puzzle about islands rising from a dark sea. Every numbered clue marks an island — and the number tells you exactly how many cells that island covers. Mark the rest of the grid as sea. All the sea must connect into a single region, and no 2×2 block of cells may be entirely sea. There is no guessing. Each of the 150 puzzles has been checked by a real solver to guarantee a single, logical solution — a path of pure deduction always exists from clue to chart. FEATURES • 150 hand-verified puzzles across three waters – Coves (5×5), Straits (7×7), Archipelago (8×8) • Guaranteed unique solution on every board — solvable by logic alone • Simple tap controls: cycle a cell between island, sea, and blank • Live 2×2 violation highlighting so mistakes are easy to catch and fix • Earn up to three stars per chart for efficient solving • Moody nautical-chart visuals with brass clue markers and hand-inked sea • Calm ambient soundtrack and tactile feedback — both toggleable • Fully offline. No ads, no accounts, no tracking. Progress stays on your device. Chart the islands. Solve the sea.