THE PLAYBOOK · SWEETTONG
How to play Nurikabe
Take a moment with Nurikabe before moving to another game. Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Look at what changes after your first action. Make your first input carefully and watch the result. Choose a clear next step rather than rushing through the instructions.
Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.
A useful comparison
Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board. Make the next step deliberately.
Your goal
Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. An attractive position is not enough unless the goal is met. Follow this game’s rules rather than another version’s.
Step by step
- Shade sea squares and leave islands white.
- Every island contains exactly one clue.
- Different islands cannot meet along an edge.
- Check puzzle verifies sizes, connectivity and forbidden sea blocks.
Controls
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. On a smaller screen, keep the active part of the board within view. Return to the rules if the result is unexpected.
A useful example
An island labelled 1 is already complete, so its edge neighbours must be sea. Use the example as a guide rather than a substitute for reading your board. Choose a deliberate next step.
Watch out for this
Two numbered islands may not merge into one. Check the rule before repeating the action. After a move, check what changed. Decide which rule explains the new state before acting again.
Common questions
What is the goal of Nurikabe?
The key detail is this: Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block.
When I return, how do I control Nurikabe?
For clarity: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
For my first round, what example helps explain Nurikabe?
Here is the relevant explanation: An island labelled 1 is already complete, so its edge neighbours must be sea.
As a new player, what should I watch out for in Nurikabe?
Two numbered islands may not merge into one.
On this playing page, what format does Nurikabe offer?
For clarity: Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.
While reading the Guide, which play mode does Nurikabe use?
The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.