# Nurikabe

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Nurikabe is a logic puzzle with a bit complicated rules and challenging solutions.

The rules are not so simple. :)
You have a grid of squares Some cells of the grid start containing numbers. The goal is to determine whether each of the cells of the grid is "black" or "white" (Islands in the Stream calls these "water" and "land" respectively). The black cells form "the nurikabe" (Islands in the Stream calls it "the stream"): they must all be orthogonally contiguous (form a single polyomino), number-free, and contain no 2x2 or larger solid rectangles (Islands in the Stream calls such illegal blocks "pools"). The white cells form "islands" (which is where Islands in the Stream got its name): each number n must be part of an n-omino composed only of white cells. All white cells must belong to exactly one island; islands must have exactly one numbered cell. Solvers will typically shade in cells they have deduced to be black and dot (non-numbered) cells deduced to be white.
Left click on a square to make it black. Right click to mark with dot. Click and drag to mark more than one square.

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This Month
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This Week
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Today
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MO3
1. Douglas Shamlin Jr.
507
00:34.64
2. bearn
177
00:40.60
3. haramey
135
00:47.14
4.anonymous
82
00:55.07
5. vowels
197
00:57.70
6. mediteran13
54
01:00.71
7. FAlin
148
01:02.43
8. A2Ragnell
17
01:13.81
9. Andy100
81
01:14.09
10. Dunnowhattodo
170
01:14.95
AO5
1. Douglas Shamlin Jr.
507
00:41.38
2. bearn
177
00:41.74
3. haramey
135
00:51.02
4.anonymous
82
00:58.40
5. vowels
197
00:59.62
6. mediteran13
54
01:03.67
7. FAlin
148
01:04.88
8. sfumato
164
01:09.88
9. Andy100
81
01:14.09
10. A2Ragnell
17
01:19.99
AO12
1. Douglas Shamlin Jr.
507
00:53.02
2. bearn
177
01:03.97
3. haramey
135
01:07.00
4.anonymous
82
01:16.16
5. FAlin
148
01:18.02
6. vowels
197
01:21.49
7. Dunnowhattodo
170
01:47.64
8. puzzleist
38
01:58.62
9. a979453451
139
02:10.72
287
02:10.79
Robots / programmatic solversinfo
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* MO3 - Mean of 3. The average of 3 consecutive times.
AO5 - Average of 5. The average of 5 consecutive times ignoring the highest and the lowest.
AO12 - Average of 12. The average of 12 consecutive times ignoring the highest and the lowest.
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