Nurikabe
Islands in the stream. A quiet logic puzzle for iPhone, with a wall to build and islands to find.
Coming soon to the App Store
How it plays
Some squares hold a number. Each number is the size of an island: a group of connected squares that contains that number and no other. Shade in the rest as one connected wall, with no 2x2 block of wall anywhere. Every puzzle has exactly one answer.
Tap a square to cycle through wall, dot (a square you know belongs to an island) and empty. Drag to paint a run of squares in one stroke.
What's inside
Four ordered packs
Easy, Medium, Hard (8x8) and Expert (10x10), ten puzzles each, building from gentle to fiendish.
Endless random puzzles
Generate a fresh puzzle on demand, from 5x5 up to 10x10, at the difficulty you choose.
Eight themes
From a quiet slate to the Great Wave, bamboo and cherry blossoms. All free. See the themes.
Made for thinking
Unlimited undo and redo, optional error highlighting, and gentle haptics. Your game is saved when you step away.
Calm by design
No ads, no accounts and no tracking. It works offline. Read the privacy page.
Learn as you go
A short built-in tutorial walks through the rules with a real puzzle. See also the FAQ.