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RULES & PRACTICE

How to Play Nurikabe

Play Nurikabe ↗

Game guide · WWJSMY

Nurikabe: a guide for your next round

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. Read the objective before making your first input. Keep the game area visible while you use its controls.

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

Bring this focus to a round

After a move, check what changed. Decide which rule explains the new state before acting again. Keep the objective visible.

Understand the aim

Create one connected sea around numbered islands of exactly the stated size, without a 2×2 sea block. The feedback beside the game helps you follow the round. Follow this game’s rules rather than another version’s.

How to proceed

  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.

Your inputs

Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution. Keep the playing area visible while using these controls. Return to the rules if the result is unexpected.

See how the rules apply

An island labelled 1 is already complete, so its edge neighbours must be sea. Your next round may have a different position, so inspect it before acting. Keep the controls nearby.

Avoid this misunderstanding

Two numbered islands may not merge into one. Read the feedback to see why an action did not have the expected result. Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board.

If you are unsure

Before I begin, what is the goal of Nurikabe?

Keep this in mind: 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?

The key detail is this: 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.

What should I watch out for in Nurikabe?

For clarity: Two numbered islands may not merge into one.

While learning, what format does Nurikabe offer?

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

For my first round, which play mode does Nurikabe use?

Keep this in mind: The mode on this page is Solo. Same-device play uses one screen; this game library does not provide internet matchmaking.

Where should I start with Nurikabe?

The key detail is this: Shade sea squares and leave islands white.

On this playing page, do I need an account or a payment for Nurikabe?

The key detail is this: No player account or payment is needed. Game scores are recreational results, not cash prizes.

For this browser game, how can I find Nurikabe again?

The key detail is this: Use the Games list or save this game page in your browser bookmarks. The Guide is linked from the playing page.

For my first round, how do I report an issue with Nurikabe?

Use the contact form and include the game name, browser, device and the actions that led to the issue. Do not send passwords or payment details.

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