Kurodoko


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Kurodoko also known as Kuromasu is a logic puzzle with simple rules and challenging solutions.

The rules are simple.
Shade some cells black guided by number clues.

- Each number clue shows how many cells are "visible" from its place.
- "Visible" are all white cells up, down, left and right of the clue, terminated by a black cell or the grid edge. The cell with the number clue is also counted as visible.
- Other clue cells are considered transparent, so visibility continues through them.
- You can't shade clue cells black.
- All white cells must be connected orthogonally in a single group.
- Black cells can't touch orthogonally (diagonal touching is allowed).

Left click on a cell to make it black. Right click to mark with a dot. Click and drag to mark more than one cell.

Video Tutorial
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Kurodoko


5x5 Kurodoko | 7x7 Kurodoko | 10x10 Kurodoko | 15x15 Kurodoko | 20x20 Kurodoko

New Puzzle
This Month
1. numbrr
327
03:19.70
2. Moonshine
34
03:48.94
3. Silkid
48
03:55.25
4. Reenolex
45
04:12.46
5. nosleeplong
146
04:15.22
6. SweatyBetty 04:31.54
7. crema
278
04:38.32
8. dreadsom
112
04:45.84
9. Lgtwins
108
04:47.18
10. Petra87
124
05:31.62
11. cloudspan
10
06:24.09
12. Tomas7407
16
06:34.82
13. LesAM 06:43.90
14. qobi
243
06:45.29
15. munggumy 06:50.91
16. Rickieman86
14
06:54.34
17. Partimento
66
06:57.61
18. SleekBlaze
28
07:20.09
19. chenh 07:24.72
20. wendylll
59
07:32.88
This Week
1. Moonshine
34
03:48.94
2. Reenolex
45
04:12.46
3. dreadsom
112
05:17.59
4. cloudspan
10
06:24.09
5. Tomas7407
16
06:34.82
6. SleekBlaze
28
07:20.09
7. Rickieman86
14
07:26.94
8. Dorice
275
07:33.87
9. quekjr 07:48.02
10. wendylll
59
07:55.03
11. chenh 08:20.20
12. qobi
243
08:55.38
13. Partimento
66
09:54.75
14. mkmk
92
11:04.70
15. Pertyian 13:13.89
16. daspore 13:18.59
17. josim 13:49.14
18. wyq97 14:10.64
19. shoner
7
17:49.37
20. AppleSaws
5
26:03.23
Today
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MO3
1. liyan
165
02:52.98
2. PuzzleMaestro
109
03:16.10
3. numbrr
327
03:23.27
4. Silkid
48
03:29.72
5. daanbe
242
03:30.24
6. Reenolex
45
03:56.55
7. Make
288
04:16.76
8. MS Paint
112
04:27.61
9. 먼지
90
04:31.96
10. mslamhoa
240
04:39.63
AO5
1. liyan
165
03:31.22
2. daanbe
242
03:41.09
3. Silkid
48
03:42.22
4. numbrr
327
03:51.81
5. Reenolex
45
04:00.46
6. PuzzleMaestro
109
04:01.67
7. Make
288
04:29.17
8. 먼지
90
04:38.70
9. MS Paint
112
04:41.52
10. Oryn
196
04:55.60
AO12
1. Silkid
48
03:56.65
2. Reenolex
45
04:18.34
3. numbrr
327
04:22.67
4. daanbe
242
04:23.96
5. PuzzleMaestro
109
05:08.81
6. Make
288
05:09.81
7. MS Paint
112
05:16.44
8. mslamhoa
240
05:21.25
9. sealhy
202
05:27.98
10. Oryn
196
05:34.26
Robots / programmatic solversinfo  
1.siebi
1
00:00.184
2.AutumnWind75
1
00:00.756
3.Paul Bismuth
1
00:05.669

* 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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