# 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
92
00:03.24
2. bearn
159
00:03.53
3. TashiroMiraki
160
00:05.45
4. BobTheJedi
49
00:06.00
5. puzzleist
32
00:06.54
6. FriedSquid 00:09.41
7. rwh0003
60
00:12.36
8. bananaman7777777
8
00:14.46
9. Yoshi Baroshi
6
00:15.91
10. Lynx Rynn
6
00:16.10
11. xilli 00:19.01
12. fishysua
112
00:21.71
13. sronse 00:25.58
14. Hyrule 00:25.62
15. Jovess 00:26.78
16. yuzuo
1
00:31.44
17. medusaworm 00:33.04
18. someonerandom 00:34.74
19. Joris Brouwer
4
00:35.93
20. jdbtwo 00:38.47
This Week
1. TashiroMiraki
160
00:05.45
2. puzzleist
32
00:06.54
3. rwh0003
60
00:12.36
4. Lynx Rynn
6
00:16.10
5. sronse 00:25.58
6. Jovess 00:26.78
7. m_and_m_toastie
55
01:20.66
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Today
1. sronse 00:25.58
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MO3
1. nabifan
81
00:02.93
2. vowels
189
00:02.96
3. bearn
159
00:03.55
4. haramey
92
00:03.66
5. Douglas Shamlin Jr.
472
00:03.75
6. sfumato
163
00:03.91
7. BingBongBob
99
00:04.01
8. mediteran13
54
00:04.93
9. numbrr
163
00:06.37
10. qqwref
249
00:06.57
AO5
1. nabifan
81
00:02.93
2. vowels
189
00:03.11
3. Douglas Shamlin Jr.
472
00:03.80
4. bearn
159
00:03.82
5. haramey
92
00:03.88
6. BingBongBob
99
00:04.07
7. sfumato
163
00:04.71
8. mediteran13
54
00:04.93
9. jaybrainer
130
00:06.25
10. numbrr
163
00:06.57
AO12
1. vowels
189
00:03.83
2. Douglas Shamlin Jr.
472
00:04.08
3. nabifan
81
00:04.11
4. bearn
159
00:04.17
5. haramey
92
00:04.73
6. BingBongBob
99
00:04.99
7. sfumato
163
00:05.23
8. mediteran13
54
00:05.93
9. qqwref
249
00:07.70
10. numbrr
163
00:08.07
Robots / programmatic solversinfo
1.4s4f400:00.255
2.nbjohnson00:00.416
3.Charlie Li
60
00:00.417

* 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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