THE PLAYBOOK · XH0411
How to play Nurikabe
Use XH0411 to play Nurikabe and read its instructions on the same page. Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Follow the rules before speed approach for your next round.
Ten checked compact 5×5 boards with fixed sea starters in some puzzles.
Rules before speed
Work slowly for one round. Explain the rule behind each choice before trying to improve your score or completion time.
Your goal
Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block.
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.
A useful example
An island labelled 1 is already complete, so its edge neighbours must be sea.
Watch out for this
Two numbered islands may not merge into one.
Common questions
Which controls should I use?
Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.
Can you show a concrete example?
An island labelled 1 is already complete, so its edge neighbours must be sea.
What is included in this edition?
Ten checked compact 5×5 boards with fixed sea starters in some puzzles.