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. JaysKun 01:04.80
2. mopon 01:16.00
3. djembefola727 02:03.21
4. Pardyboy 02:05.90
5. hasuu
19
02:24.40
6. kbdude8 02:27.68
7. tiramasu 02:28.86
8. NoahR
166
02:36.06
9. Ben65732
101
02:45.03
10. MingQuk
1
02:49.47
11. tommy8431
34
03:47.81
12. Chronodrax
30
03:49.38
13. GlennCRhoads 03:59.20
14. Bhaygin 04:09.19
15. s56squared 04:10.19
16. jahayashi 04:36.26
17. LINK3
9
04:54.19
18. Albert Micah Lyu
50
04:59.03
19. paejunk
23
05:21.82
20. kkpkkpkkpp
27
05:38.24
This Week
1. mopon 01:16.00
2. djembefola727 02:03.21
3. Chronodrax
30
03:49.38
4. s56squared 06:22.31
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Today
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MO3
1. bearn
107
01:00.80
2. a979453451
119
02:11.63
3. Marjan2
11
02:20.37
4. schapel
22
02:21.52
5. Douglas Shamlin Jr.
383
02:26.82
6. Stemism
94
02:30.06
7. Urban Fatur
60
02:30.28
8. sfumato
144
02:41.97
9. supernoob
30
02:44.24
10. hasuu
19
02:56.76
AO5
1. bearn
107
01:07.20
2. a979453451
119
02:12.63
3. Marjan2
11
02:24.40
4. Urban Fatur
60
02:29.52
5. schapel
22
02:32.26
6. Stemism
94
02:36.81
7. supernoob
30
02:55.19
8. hasuu
19
03:02.85
9. NeKa
25
03:04.74
10. AnthonyL
43
03:26.73
AO12
1. bearn
107
01:47.37
2. a979453451
119
02:37.21
3. supernoob
30
03:17.11
4. Stemism
94
03:31.73
5. AnthonyL
43
04:04.73
6. Fastfaxer
115
04:12.82
7. NoahR
166
04:14.19
8. qqwref
136
04:34.41
9. Dizmo12
69
04:51.67
10. Chronodrax
30
05:26.56
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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2022-05-26 00:51:40

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