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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Nurikabe


5x5 Nurikabe Easy | 5x5 Nurikabe Hard | 7x7 Nurikabe Easy | 7x7 Nurikabe Hard | 10x10 Nurikabe Easy | 10x10 Nurikabe Hard | 12x12 Nurikabe Easy | 12x12 Nurikabe Hard | 15x15 Nurikabe Easy | 15x15 Nurikabe Hard | 20x20 Nurikabe Easy

This Month
1.Thrillhousr84701:02.11
2.JaysKun01:18.22
3.asdfhavcjklcjkl01:19.74
4.MerickOWA01:23.95
5.PrivateJune01:29.12
6.tailor01:33.31
7.BoerBaan01:46.96
8.Hornlitz
27
02:22.91
9.sfumato
98
02:31.62
10.Jiu51602:33.17
11.kbdude802:36.09
12.JazzStyx02:49.84
13.oddsocks03:00.26
14.hasuu03:29.65
15.ILBsAOVfirst03:31.34
16.nosleeplong
46
03:35.37
17.jasonbob03:44.41
18.Albert Micah Lyu
50
03:50.17
19.HackMan03:52.24
20.cc-drake
14
04:01.53
This Week
1.JaysKun01:19.52
2.tailor01:39.97
3.BoerBaan01:49.48
4.Jiu51603:06.77
5.sfumato
98
03:22.74
6.hasuu03:29.65
7.Albert Micah Lyu
50
03:50.17
8.tiramasu04:15.27
9.LightPaladin07
17
04:25.01
10.Madarjeen
35
04:31.75
11.carukh05:07.09
12.AJfinch05:24.32
13.OneTrueGoon05:43.97
14.Edash
34
05:57.72
15.TomKorn06:08.95
16.IBLR99999906:26.96
17.JohnnyB06:38.38
18.Cancara07:42.74
19.meliiii08:55.70
20.honeychen45
31
09:47.73
Today
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MO3
1.a979453451
97
02:11.63
2.Stemism
84
02:30.06
3.anonymous
49
02:36.31
4.sfumato
98
02:41.97
5.schapel
19
02:42.63
6.supernoob
21
02:44.24
7.Chronodrax
21
03:39.71
8.arcer
65
03:42.86
9.anonymous
19
03:57.91
10.markelobitx
32
04:07.63
AO5
1.a979453451
97
02:16.14
2.anonymous
49
02:29.52
3.Stemism
84
02:36.81
4.supernoob
21
02:55.19
5.schapel
19
03:09.06
6.sfumato
98
03:45.20
7.arcer
65
04:11.22
8.markelobitx
32
04:22.88
9.anonymous
19
04:54.90
10.Joel cain
16
05:28.12
AO12
1.a979453451
97
02:37.21
2.supernoob
21
03:17.11
3.Stemism
84
03:31.73
4.anonymous
19
08:18.58
5.Steven Steinsaltz
56
09:38.01
6.mikebrandt
21
09:39.25
7.rozer
151
10:36.39
8.Dunnowhattodo
78
11:17.20
9.anonymous
73
12:50.81
10.Harli
53
13:32.58
Robots / programmatic solversinfo  
1.Charlie Li
60
00:00.518
2.nbjohnson00:00.691
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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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2021-10-22 08:47:07

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