# 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. miggy
68
00:48.84
2. A2Ragnell
17
00:51.82
3. JaysKun 00:57.57
4. mopon 01:01.91
5. asdfhavcjklcjkl 02:01.47
6. XantheneL
44
02:07.08
7. erichiro 02:17.77
8. oddsocks 02:35.70
9. John9439
62
02:46.22
10. SeaSnailsShell
55
02:47.29
11. AgnieszkaNesa
28
03:06.09
12. COlDAiR 03:18.49
14. bearjason 04:10.81
15. AzuReVaPouR 04:13.87
16. Bhaygin 04:20.01
19. ALXDR 05:10.83
20. wam3988 05:18.78
This Week
1. miggy
68
00:49.92
2. JaysKun 00:57.57
3. asdfhavcjklcjkl 02:01.47
4. erichiro 02:17.77
5. SeaSnailsShell
55
02:47.29
6. AgnieszkaNesa
28
03:06.09
7. COlDAiR 03:18.49
9. bearjason 04:10.81
12. Ninkola90
17
05:41.86
13. wam3988 09:57.61
14. Kenolo353
74
37:27.68
15. naivebassoon
25
24d 20:31:23.64
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MO3
1. bearn
185
00:37.64
2. haramey
152
00:50.97
3. miggy
68
00:53.53
4. vowels
200
01:08.26
5. numbrr
200
01:22.34
6. A2Ragnell
17
01:29.82
7. Douglas Shamlin Jr.
524
01:32.36
8. schapel
38
02:10.13
9. a979453451
146
02:11.63
10. Urban Fatur
83
02:11.79
AO5
1. bearn
185
00:37.23
2. haramey
152
00:52.80
3. miggy
68
00:54.54
4. vowels
200
01:14.69
5. numbrr
200
01:22.39
6. Douglas Shamlin Jr.
524
01:38.67
7. A2Ragnell
17
01:49.43
8. a979453451
146
02:12.63
9. XantheneL
44
02:15.51
10. BobTheJedi
56
02:19.18
AO12
1. bearn
185
00:40.26
2. haramey
152
00:56.31
3. vowels
200
01:25.34
4. miggy
68
01:27.11
5. Douglas Shamlin Jr.
524
02:11.52
6. numbrr
200
02:34.44
7. XantheneL
44
02:36.29
8. a979453451
146
02:37.21
9. cc-drake
94
03:01.70
10. BobTheJedi
56
03:16.55
Robots / programmatic solversinfo
1.4s4f400:00.464
2.Charlie Li
61
00:00.518
3.nbjohnson00:00.691

* 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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