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.