# 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. K-NURIKABE
81
00:07.06
2. asdfhavcjklcjkl 00:12.99
3. Manuel2 00:27.67
4. kbdude8 00:29.56
5. bristerchan 00:40.50
6. HackMan
70
00:46.19
7. SillyPig617 00:46.81
8. Kinggrun 00:52.92
9. Basalt 00:59.66
10. tamagochi 01:01.67
11. TheBigMD
98
01:11.89
12. crema
96
01:13.15
13. Gregory 01:20.79
14. Gregger
2
01:23.17
15. tesmeiko9000 01:36.49
16. Kukko 01:37.12
17. skylucario 01:37.86
18. yosiaki
72
01:46.86
19. MishaVargas
1
01:51.84
20. bearjason 01:53.53
This Week
1. bristerchan 00:40.50
2. HackMan
70
00:46.19
3. Basalt 01:20.65
4. Gregger
2
01:23.17
5. tamagochi 01:26.39
6. tesmeiko9000 01:36.49
7. lasagna 03:50.54
8. Gregory 03:52.65
9.--- empty -----:--
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Today
1. bristerchan 00:40.50
2. Basalt 01:20.65
3. Gregger
2
01:23.17
4. tamagochi 01:26.39
5. tesmeiko9000 01:36.49
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
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MO3
1. vowels
211
00:07.31
2. bearn
198
00:07.84
3. haramey
196
00:08.87
4. K-NURIKABE
81
00:08.88
5. mediteran13
54
00:09.65
6. numbrr
252
00:09.74
7. Douglas Shamlin Jr.
638
00:10.02
8. sfumato
164
00:10.39
9. jamiecjx
67
00:14.34
10. miggy
104
00:14.73
AO5
1. vowels
211
00:08.18
2. bearn
198
00:08.74
3. haramey
196
00:08.94
4. K-NURIKABE
81
00:09.24
5. mediteran13
54
00:10.35
6. numbrr
252
00:10.46
7. sfumato
164
00:10.64
8. Douglas Shamlin Jr.
638
00:10.79
9. jamiecjx
67
00:15.36
10. BingBongBob
107
00:15.81
AO12
1. bearn
198
00:10.51
2. vowels
211
00:11.05
3. K-NURIKABE
81
00:11.74
4. haramey
196
00:11.93
5. Douglas Shamlin Jr.
638
00:13.44
6. numbrr
252
00:13.46
7. sfumato
164
00:16.76
8. BingBongBob
107
00:18.84
9. miggy
104
00:18.90
10. jamiecjx
67
00:20.71
Robots / programmatic solversinfo
1.4s4f400:00.286
2.nbjohnson00:00.436
3.Charlie Li
61
00:00.446

* 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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