# 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
1. K-NURIKABE
81
00:04.65
2. Manuel2 00:08.86
21
00:09.27
4. fengkun yang
86
00:10.90
5. Sombro64 00:12.75
6. HackMan
70
00:14.28
7. Lefog
15
00:15.06
8. MishaVargas
1
00:21.08
9. Kukko 00:23.58
10. shangdou
12
00:23.74
11. crema
96
00:25.55
12. bearjason 00:32.13
13. yosiaki
72
00:34.84
14. jfisher2
5
00:36.20
15. grimmgirlfandom
107
00:37.99
17. AnonyMinor 01:25.45
18. w24w40w
34
02:05.14
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This Week
1. K-NURIKABE
81
00:04.82
21
00:09.27
3. HackMan
70
00:14.28
4. MishaVargas
1
00:21.08
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Today
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MO3
1. Douglas Shamlin Jr.
638
00:02.74
2. vowels
211
00:02.83
3. BingBongBob
107
00:03.38
4. bearn
198
00:03.44
5. nabi
92
00:03.46
6. haramey
196
00:03.51
7. sfumato
164
00:03.86
8. qqwref
259
00:03.93
9. jaybrainer
198
00:03.97
10. K-NURIKABE
81
00:04.38
AO5
1. Douglas Shamlin Jr.
638
00:02.77
2. vowels
211
00:02.88
3. bearn
198
00:03.44
4. nabi
92
00:03.55
5. haramey
196
00:03.59
6. BingBongBob
107
00:03.63
7. jaybrainer
198
00:04.02
8. sfumato
164
00:04.09
9. K-NURIKABE
81
00:04.51
10. qqwref
259
00:04.76
AO12
1. Douglas Shamlin Jr.
638
00:03.25
2. vowels
211
00:03.42
3. bearn
198
00:03.95
4. nabi
92
00:04.07
5. BingBongBob
107
00:04.15
6. haramey
196
00:04.42
7. K-NURIKABE
81
00:04.67
8. sfumato
164
00:04.68
9. jaybrainer
198
00:04.84
10. numbrr
252
00:05.43
Robots / programmatic solversinfo
1.Charlie Li
61
00:00.412
2.nbjohnson00:00.475
3.俊杰_Charles
4
00:01.146

* 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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