Nurikabe

An island can take almost any shape, and the number of shapes grows fast with size — past a handful of cells, there's no realistic list left to check, unlike Cell Blocks' neat rectangles. So the puzzle works by connectivity instead: track which cells each clue could still reach, and let the sea's own rule — always connected, never a 2×2 block — box the islands in from outside.

RULES

• Each number is an island of exactly that many unshaded cells.
• Islands never touch side by side.
• The sea is one connected region and never fills a 2×2 square.

CONTROLS

• Tap cycles shade → dot → clear; drag to paint a run.
• Arrow keys move the cursor; space or enter cycles a cell through sea, dot and clear.