# 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. haramey
58
00:02.30
2. BobTheJedi
30
00:03.23
3. Solander 00:03.36
4. A2Ragnell
17
00:03.61
5. limsh1201 4
50
00:03.68
6. boru
76
00:03.70
7. DrVince
53
00:03.73
8. 09Ash
16
00:03.81
9. Arjun25
20
00:03.94
10. toaster611
42
00:03.97
11. da32s1da
15
00:04.10
12. Speedygoofers
3
00:04.30
13. bundtcake
11
00:04.37
14. kbdude8 00:04.48
15. Sombro64 00:04.56
81
00:04.98
17. HackMan
66
00:05.46
18. Hanou
12
00:05.58
19. eitan 00:05.60
20. eonhochang
38
00:05.72
This Week
1. haramey
58
00:02.30
2. BobTheJedi
30
00:03.23
3. A2Ragnell
17
00:03.69
4. boru
76
00:03.70
5. Speedygoofers
3
00:04.30
6. Solander 00:05.85
7. Sombro64 00:06.23
8. chocolateonions
17
00:06.80
9. rwh0003
58
00:06.83
10. goose259
3
00:06.98
11. eonhochang
38
00:07.63
12. Hargaz
30
00:08.33
13. Evan12345 00:08.92
14. Pimipoo 00:09.22
15. Kenolo353
57
00:09.30
16. avielkl 00:10.94
17. yanan
5
00:11.92
18. medusaworm 00:15.69
19. BTW
2
00:17.42
20. Mikolaj
10
00:18.17
Today
1. Mikolaj
10
00:18.17
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MO3
1. Douglas Shamlin Jr.
457
00:01.68
1. vowels
181
00:01.68
3. sfumato
161
00:01.78
4. BingBongBob
89
00:02.00
5. bearn
139
00:02.03
6. nabifan
76
00:02.09
7. jai22933
21
00:02.19
8. IHNN1
11
00:02.28
9. mediteran13
54
00:02.46
10. jaybrainer
121
00:02.47
AO5
1. Douglas Shamlin Jr.
457
00:01.71
2. vowels
181
00:01.77
3. sfumato
161
00:01.89
4. nabifan
76
00:02.09
5. bearn
139
00:02.10
6. jai22933
21
00:02.29
7. IHNN1
11
00:02.36
8. BingBongBob
89
00:02.41
9. jaybrainer
121
00:02.44
10. mediteran13
54
00:02.50
AO12
1. Douglas Shamlin Jr.
457
00:01.87
2. vowels
181
00:01.98
3. sfumato
161
00:02.29
4. bearn
139
00:02.35
5. nabifan
76
00:02.45
6. BingBongBob
89
00:02.55
7. jai22933
21
00:02.61
8. jaybrainer
121
00:02.88
9. IHNN1
11
00:02.94
10. qqwref
230
00:03.05
Robots / programmatic solversinfo
1.nbjohnson00:00.407
2.Charlie Li
60
00:00.420
3.mediteran13
54
00:03.440

* 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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