# 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. bearn
159
00:20.61
2. haramey
92
00:27.89
3. nabifan
81
00:47.12
4. TashiroMiraki
160
00:57.50
5. BingBongBob
99
00:58.81
6. BobTheJedi
49
01:07.10
7. SheaButter
50
01:19.81
8. Solander
31
01:22.41
9. Thrillhousr847 01:22.92
10. rwh0003
60
01:38.63
11. Bluegill16384
118
01:38.76
12. Dan380 01:53.64
13. Thrillhou 01:54.31
14. JohnnyB 02:09.09
15. BlackCat99
33
02:09.20
16. Dorice
177
02:14.22
17. yhkim 02:14.93
18. qzxxyyzw
6
02:18.81
19. Xandaidh 02:27.13
20. avielkl 02:36.76
This Week
1. BobTheJedi
49
01:07.10
2. Thrillhousr847 01:22.92
3. Solander
31
01:32.76
4. rwh0003
60
01:38.63
5. Thrillhou 02:05.02
6. JohnnyB 02:09.09
7. yhkim 02:14.93
8. Dan380 02:26.03
9. Jakub Slatinský
36
03:15.40
10. jtenner 03:25.84
11. sronse 04:54.11
12. Joris Brouwer
4
05:23.62
13. Opsosaurus
35
06:13.32
14. Sinews
22
06:30.61
15. abcdegf
20
07:43.90
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MO3
1. bearn
159
00:22.16
2. haramey
92
00:31.17
3. numbrr
163
00:31.82
4. vowels
189
00:33.38
5. sfumato
163
00:33.67
6. Douglas Shamlin Jr.
472
00:35.78
7. mediteran13
54
00:37.44
8. A2Ragnell
17
00:44.79
9.anonymous
73
00:50.24
10. Dunnowhattodo
162
01:01.34
AO5
1. bearn
159
00:23.48
2. numbrr
163
00:33.47
3. vowels
189
00:38.11
4. haramey
92
00:38.88
5. Douglas Shamlin Jr.
472
00:38.99
6. sfumato
163
00:39.00
7. mediteran13
54
00:40.05
8. A2Ragnell
17
00:47.69
9.anonymous
73
00:52.12
10. RooSTeR
107
01:05.72
AO12
1. bearn
159
00:30.44
2. numbrr
163
00:43.89
3. Douglas Shamlin Jr.
472
00:47.20
4. haramey
92
00:48.25
5. vowels
189
00:51.62
6. sfumato
163
00:53.19
7. A2Ragnell
17
00:53.52
8.anonymous
73
00:59.21
9. Dunnowhattodo
162
01:15.37
10. RooSTeR
107
01:20.48
Robots / programmatic solversinfo
1.Charlie Li
60
00:00.521
2.4s4f400:00.574
3.nbjohnson00:00.843

* 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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