THE PLAYBOOK · SDYZ85
How to play Nurikabe
Read the aim of Nurikabe, then make your first move. Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Use the example below to understand a decision. Check the rule that explains your first action. 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.
Notice the feedback
Watch the feedback after an action. A message can explain whether the input was accepted or whether a rule needs attention. Refer to the controls when needed.
Your goal
Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Use the instructions to see which actions move you towards it. Check the rules when you are unsure.
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. Compare this with the rule that governs the move. Choose a deliberate next step.
Watch out for this
Two numbered islands may not merge into one. Check the rule before repeating the action. Read one step at a time and try it on the playing area. Match the instruction to the control you use.
Common questions
As a new player, what is the goal of Nurikabe?
Here is the relevant explanation: Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block.
Before I begin, how do I control Nurikabe?
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
Before I begin, what example helps explain Nurikabe?
The key detail is this: An island labelled 1 is already complete, so its edge neighbours must be sea.
While reading the Guide, what should I watch out for in Nurikabe?
Keep this in mind: Two numbered islands may not merge into one.
What format does Nurikabe offer?
Here is the relevant explanation: Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.
When I return, which play mode does Nurikabe use?
For clarity: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.