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

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MO3
1. bearn
74
01:26.87
2. FAlin
134
01:38.35
3. sfumato
127
01:59.36
4. mediteran13
53
02:56.97
5. Bandit
50
03:11.96
6. a979453451
107
03:31.85
7. NoahR
133
03:58.41
8. Dunnowhattodo
92
04:05.86
9. Clhis
62
04:16.07
10. fn
81
04:25.25
AO5
1. bearn
74
01:40.20
2. FAlin
134
02:27.65
3. a979453451
107
03:09.84
4. mediteran13
53
03:33.91
5. Bandit
50
03:49.50
6. NoahR
133
04:06.46
7. Luisma Suarez Menendez
54
04:17.59
8. arcer
74
04:24.85
9. Steven Steinsaltz
64
04:28.78
10. axu6822
58
04:36.50
AO12
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Robots / programmatic solversinfo  
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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.
You need to be logged in to track your averages


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2022-01-23 12:54:49

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