Nurikabe
Easy
00:00
Classic
Easy Nurikabe — what to expect
Easy Nurikabe uses 6×6 grids with small islands (typically 1 to 4 cells). Island isolation handles the cells numbered 1 — just surround them with sea. For the rest, look for cells that no island can reach. At this size the sea connectivity constraint rarely causes trouble because there simply isn't room for the sea to split.
How to play Nurikabe
- Every cell ends up one of two things: island, left white, or sea, shaded black.
- Each number is the SIZE of its island — that many white cells joined edge to edge, with the number itself counted among them.
- Every island holds exactly one number. So a 1 is finished where it stands, and the four cells beside it — above, below, left and right — are sea. Its corners are free.
- Two islands never sit side by side. Meeting at a corner is fine — a finished board is full of diagonal contacts.
- All the black cells join into one single sea. Nothing may be walled off from the rest of it.
- No 2×2 block may be entirely sea. When three corners of one are black the fourth has to be white, and that is where many boards open up.
- Every puzzle has one solution, reachable by logic alone, and every board has a move you can make from the empty grid.