# 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. asdfhavcjklcjkl 00:04.10
2. Oryn
122
00:08.39
3. yoshibaroshi
7
00:12.15
4. Ailurus
127
00:12.63
5. Dorice
190
00:14.17
6. qiguai 00:14.63
7. tciutb
26
00:14.79
8. KingAmethyst 00:14.89
9. Absofruitly 00:15.28
10. Rhododendron
57
00:15.66
11. jorah
75
00:17.69
12. s56squared 00:19.70
13. tolozen
21
00:20.52
14. wam3988 00:20.58
15. swpomeroy
111
00:21.34
16. 윤슬
6
00:21.62
17. Kenolo353
74
00:22.59
18. MishaVargas
1
00:29.61
19. figma
18
00:38.78
20. Grymhar 00:40.20
This Week
1. asdfhavcjklcjkl 00:04.10
2. qiguai 00:14.63
3. Absofruitly 00:15.28
4. Rhododendron
57
00:15.66
5. Dorice
190
00:16.37
6. wam3988 00:20.58
7. figma
18
00:38.78
8. Kenolo353
74
00:46.83
9. Jennalynn Morton
88
01:00.90
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Today
1. Jennalynn Morton
88
01:00.90
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MO3
1. vowels
200
00:02.83
2. Douglas Shamlin Jr.
524
00:02.84
3. BingBongBob
107
00:03.38
4. bearn
185
00:03.44
5. nabi
92
00:03.46
6. haramey
152
00:03.51
7. sfumato
164
00:03.86
8. qqwref
258
00:03.93
9. jaybrainer
162
00:04.61
10. mediteran13
54
00:04.95
AO5
1. vowels
200
00:02.88
2. Douglas Shamlin Jr.
524
00:03.04
3. bearn
185
00:03.44
4. nabi
92
00:03.55
5. haramey
152
00:03.59
6. BingBongBob
107
00:03.63
7. sfumato
164
00:04.09
8. qqwref
258
00:04.76
9. jaybrainer
162
00:05.09
10. numbrr
200
00:05.46
AO12
1. vowels
200
00:03.42
2. Douglas Shamlin Jr.
524
00:03.45
3. bearn
185
00:03.95
4. nabi
92
00:04.07
5. BingBongBob
107
00:04.15
6. haramey
152
00:04.42
7. sfumato
164
00:04.68
8. qqwref
258
00:06.03
9. mediteran13
54
00:06.09
10. jaybrainer
162
00:06.30
Robots / programmatic solversinfo
1.Charlie Li
61
00:00.412
2.nbjohnson00:00.475
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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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