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Nurikabe

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Logic & numbers
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THE PLAYBOOK · QCYANGCHU

The Nurikabe playbook

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. Identify the playing area and the controls you need. Keep the game area visible while you use its controls.

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

Practice beyond the first move

Before your first action, say what you are trying to achieve. Then compare the result with the goal. Make the next step deliberately.

What the game asks you to do

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. The example below illustrates a decision.

A walkthrough of the rules

  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.

How your actions work

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. A new-round button replaces the current round.

Learn from a sample situation

An island labelled 1 is already complete, so its edge neighbours must be sea. Use the example as a guide rather than a substitute for reading your board. Choose a deliberate next step.

Pay attention to this rule

Two numbered islands may not merge into one. A different version of the game may use a different rule. Compare the worked example with your own position. Use the reasoning, not an answer copied from a different board.

Questions about this game

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 reading the Guide, how do I control Nurikabe?

Keep this in mind: Click or tap squares or graph edges. Number boards include a digit pad. Undo reverses the previous change; Check puzzle validates the solution.

While reading the Guide, what example helps explain Nurikabe?

Keep this in mind: 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?

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

For my first round, what format does Nurikabe offer?

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

While learning, which play mode does Nurikabe use?

The key detail is this: 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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