THE PLAYBOOK · SLTPPF
How to play Nurikabe
SLTPPF presents Nurikabe with a practical playbook rather than a download screen. Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Read the first-round orientation note before you begin.
Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.
First-round orientation
Before playing, identify the objective and the input controls. Use your first round to learn what changes after a valid action.
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
What completes a round?
Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block.
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.
What can I play here?
Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.
Does play involve an account or cash?
No. Play is free, without registration, deposits, bets or cash prizes.