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Nurikabe Help

Rules / Objectives Summary

• The completed grid is a sea of Blue water with White islands.
• You have to find all of the islands.
• The numbers tell you how many White squares are in each island.
• All of the Blue water squares are connected.
• 2x2 Blue water blocks are NOT allowed (2x2 White island blocks are).

See the Walkthrough for extra tips and tricks.

What are the numbers for? These are the sizes of islands that can be found in the sea. Move your mouse over the puzzle to see the answer.

Walkthrough

	Step 1 This is the start of the puzzle. Solve this puzzle for yourself at the same time.
	Step 2 Any 1 clue/island must already be complete, and we can therefore make each adjoining square Blue.
	Step 3 These squares cannot be White as this would make the 4 and 5 clues part of the same island, which makes no sense.
	Step 4 All sea squares are connected, so the sea must be able to reach the indicated squares (that are already sea) so these squares are Blue.
	Step 5 These squares are the only place these islands can be, and must be White.
	Step 6 This square completes the 2 island, and hence must be White.
	Step 7 As the 2 island is complete, these squares cannot be White.
	Step 8 The left square must be sea otherwise we'd have an isolated portion of sea, which makes the right square the last piece of the 5 island.
	Step 9 As the 5 island is complete, these squares must be sea.
	Step 10 As a block of 2x2 sea isn't allowed this square must be White, and the only island long enough to reach is the 8.
	Step 11 There are a number of squares that simply cannot be reached by any island on the grid, and hence must be sea - these are some of the more obvious ones.
	Step 12 These squares must all be islands, two of which to avoid a 2x2 sea block, and the other to join the existing island towards the 8 clue.
	Step 13 These squares must be part of the 8 island.
	Step 14 The 8 island isn't long enough to go into these squares as well, as it only just reaches the square from step 10.
	Step 15 No island is long enough to reach these squares.
	Step 16 These must be White to avoid 2x2 sea blocks.
	Step 17 These must be White as each has only one possible island that can reach them. Once the White squares are known, those around them must be Blue to complete each clue.
	Step 18 These squares are (obviously) White.
	Step 19 This square cannot be reached by any island.
	Step 20 These must be White to avoid 2x2 sea blocks, this completes these two islands and those around them must be Blue.
	Step 21 This square must be Blue to avoid isolated sea, which leaves only three squares which must complete the 4 island.
	Step 22 The completed puzzle. Phew!