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. missPear
92
00:13.30
2. qobi
239
00:13.48
3. nosleeplong
143
00:14.30
4. SilverHawk
216
00:14.59
5. Reenolex
19
00:14.66
6. mbart
75
00:14.78
7. JihooLee
20
00:15.94
8. Rickieman86 00:18.36
9. kennethaw88
158
00:19.15
10. daisyisaflower
1
00:19.90
11. Partimento
62
00:22.08
12. effek05
39
00:22.85
13. Jazka 00:23.22
14. Lynn Bendixsen
151
00:23.78
15. sandrovka
14
00:23.80
16. cryptOakmont 00:24.44
17. daghan
34
00:24.84
18. Sebinot
45
00:24.91
19. Odenzon
38
00:26.56
20. Opie1234 00:26.71
This Week
1. missPear
92
00:13.30
2. mbart
75
00:17.31
3. kennethaw88
158
00:19.15
4. Lynn Bendixsen
151
00:23.78
5. sandrovka
14
00:24.25
6. Rickieman86 00:24.65
7. Opie1234 00:26.71
8. qobi
239
00:28.00
9. xilli 00:29.39
10. MEOWMILLAKAT
15
00:36.09
11. BlueOcarina
90
00:36.70
12. shoner
7
00:44.69
13. laries
43
00:53.45
14. darjien 01:02.08
15. viysid
25
01:03.54
16. randomflyintaco
146
01:46.10
17. David999999 03:19.57
18. SidGu
52
03:45.17
19. Uthor 2d 15:18:43.44
20.--- empty -----:--
Today
1. sandrovka
14
00:25.39
2. BlueOcarina
90
01:22.57
3. Lynn Bendixsen
151
04:50.45
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. PuzzleMaestro
94
00:08.67
2. daanbe
237
00:09.57
3. numbrr
321
00:09.88
4. hhhhhh2
153
00:10.65
5. Oryn
180
00:11.22
6. Make
285
00:11.34
7. Meerkat
214
00:11.56
8. jaybrainer
271
00:12.05
9. Puzzleist
115
00:13.05
10. qqwref
266
00:13.14
AO5
1. daanbe
237
00:09.76
2. PuzzleMaestro
94
00:09.87
3. numbrr
321
00:11.68
4. Make
285
00:11.87
5. Oryn
180
00:12.02
6. hhhhhh2
153
00:12.68
7. jaybrainer
271
00:13.81
8. Meerkat
214
00:14.05
9. Fastfaxer
131
00:14.16
10. Puzzleist
115
00:14.19
AO12
1. daanbe
237
00:12.13
2. PuzzleMaestro
94
00:12.45
3. numbrr
321
00:14.94
4. Make
285
00:15.29
5. jaybrainer
271
00:16.64
6. hkjsf
161
00:16.91
7. Oryn
180
00:16.97
8. MoFan
120
00:17.56
9. Meerkat
214
00:17.59
10. hhhhhh2
153
00:18.37
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:01.055
2.Elizabeth Tang
1
03:04.647
3.cheard
1
16:51.667

* 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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