Nurikabe


Translate this site.

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.

Video Tutorial
Hide the rules

Share

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. vowels
161
00:03.35
2. CoBoMa 00:07.10
3. 8bit
26
00:07.96
4. BingBongBob
65
00:08.91
5. HackMan
24
00:12.75
6. ZeX420 00:12.79
7. Dorice
136
00:12.83
8. JuarTM
3
00:16.46
9. nrtz
73
00:16.80
10. nabifan
57
00:17.28
11. Abcdexter 00:20.78
12. velvettrio 00:22.68
13. Truth-or-Peace
33
00:23.29
14. Uthor 00:28.25
15. medusaworm 00:28.47
16. Corallystarfish
54
00:33.79
17. aherman89 00:36.35
18. raman 00:44.16
19. AbsInfini2022
9
00:56.02
20. toaster611
29
00:59.22
This Week
1. 8bit
26
00:07.96
2. Dorice
136
00:12.83
3. Truth-or-Peace
33
00:23.29
4. medusaworm 00:28.47
5. Corallystarfish
54
00:33.79
6. raman 00:44.16
7. Jens
23
01:00.33
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. 8bit
26
00:07.96
2.--- empty -----:--
3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. bearn
125
00:03.79
2. Douglas Shamlin Jr.
422
00:03.80
3. sfumato
159
00:03.91
4. vowels
161
00:04.63
5. mediteran13
54
00:04.93
6. numbrr
126
00:06.37
7. soy
76
00:06.73
8. million
48
00:07.17
9. Fastfaxer
117
00:07.26
10. Make
152
00:07.73
AO5
1. bearn
125
00:03.82
2. sfumato
159
00:04.71
3. mediteran13
54
00:04.93
4. Douglas Shamlin Jr.
422
00:05.01
5. vowels
161
00:05.07
6. numbrr
126
00:06.57
7. Make
152
00:07.26
8. soy
76
00:07.30
9. million
48
00:07.94
10. Fastfaxer
117
00:08.14
AO12
1. bearn
125
00:04.66
2. sfumato
159
00:05.23
3. Douglas Shamlin Jr.
422
00:05.44
4. mediteran13
54
00:05.93
5. vowels
161
00:06.09
6. numbrr
126
00:08.07
7. Fastfaxer
117
00:08.84
8. Make
152
00:10.20
9. soy
76
00:10.30
10. qqwref
187
00:10.95
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.
You need to be logged in to track your averages


Find your position in

Enter screen name:


More Logic Puzzles:  hideshow

2022-10-03 15:39:29

www.puzzle-nurikabe.com
Remove Ads