# 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. bearn
177
00:55.02
2. Douglas Shamlin Jr.
507
01:05.44
3. vowels
197
01:08.00
4. FAlin
148
01:38.35
5. haramey
135
01:43.47
6. qqwref
257
01:46.93
7. sfumato
164
01:50.49
8.anonymous
132
01:51.36
9. Dunnowhattodo
170
02:00.64
10.anonymous
82
02:02.27
AO5
1. bearn
177
01:06.32
2. vowels
197
01:10.40
3. Douglas Shamlin Jr.
507
01:12.34
4.anonymous
82
01:46.18
5. sfumato
164
01:55.14
6. Dunnowhattodo
170
02:05.38
7. haramey
135
02:08.06
8. qqwref
257
02:16.90
9.anonymous
132
02:26.34
10. FAlin
148
02:27.65
AO12
1. bearn
177
01:21.67
2. vowels
197
01:26.72
3. Dunnowhattodo
170
02:36.33
4. qqwref
257
02:48.54
5. Andrej Senkic
58
03:38.36
6. a979453451
139
03:44.30
7. NoahR
218
03:49.32
8. axu6822
84
04:09.51
9. Bandit
72
04:12.18
10. jeffafa
110
04:15.31
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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2023-09-26 16:39:32

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