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Solo · FREE PLAY

Nurikabe

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Logic & numbers
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THE PLAYBOOK · SZHLJS

How to play Nurikabe

Try Nurikabe at your own pace and keep its objective in view. Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. Keep the game area visible while you use its controls. Treat the first round as a chance to learn the controls. Keep the game area visible while you use its controls.

Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.

Focus on one rule

Choose one rule to keep in mind for this round. Apply it consistently rather than guessing what another version might allow. Keep the objective visible.

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. Take a moment to understand the current position.

Step by step

  1. Shade sea squares and leave islands white.
  2. Every island contains exactly one clue.
  3. Different islands cannot meet along an edge.
  4. 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. Read a button’s label before selecting it. Look at the feedback after the action.

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. Keep the game’s format in mind.

Watch out for this

Two numbered islands may not merge into one. Check the rule before repeating the action. When a decision goes wrong, compare it with the common mistake described below. Start again only when you intend to leave the current round.

Common questions

When I return, what is the goal of Nurikabe?

Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block.

While learning, 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.

On this playing page, what example helps explain Nurikabe?

For clarity: An island labelled 1 is already complete, so its edge neighbours must be sea.

For a quick reminder, what should I watch out for in Nurikabe?

The key detail is this: Two numbered islands may not merge into one.

For my first round, what format does Nurikabe offer?

The key detail is this: Play ten compact 5×5 puzzles. Some boards begin with fixed shaded sea cells.

When I return, which play mode does Nurikabe use?

Here is the relevant explanation: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.

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