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. Oryn
196
00:01.93
2. Silkid
48
00:02.75
3. RelaxedCockatoo
67
00:02.88
4. MushroomsCavern
136
00:04.15
5. cloudspan
10
00:05.16
6. NyoomCat 00:05.24
7. kennethaw88
164
00:05.31
8. geyik
226
00:05.35
9. oshi
64
00:05.82
10. qobi
243
00:05.90
11. shoner
7
00:06.42
12. sandrovka
33
00:06.61
13. Rickieman86
14
00:06.66
14. daspore 00:06.81
15. insanebrain 00:06.98
15. Opie1234 00:06.98
17. PaulFrisk 00:07.15
18. unko
33
00:07.27
19. takaz 00:07.56
20. Dichterling
11
00:07.58
This Week
1. cloudspan
10
00:05.72
2. NyoomCat 00:06.36
3. qobi
243
00:06.50
4. Dichterling
11
00:07.58
5. sandrovka
33
00:07.78
6. FangTianyi
29
00:07.99
7. AppleSaws
5
00:08.65
7. wyq97 00:08.65
9. IanTheG
26
00:09.66
10. mts55
48
00:10.13
11. Opie1234 00:10.91
12. PeterP3
21
00:12.06
13. A3ngus
5
00:12.99
14. Kannhd 00:14.51
15. xilli 00:16.87
16. soupie
4
00:20.64
17. Jeannette
53
00:22.10
18. SilkyGrove
70
00:29.98
19. MacGamer
42
00:32.04
20. Jfisher 00:33.95
Today
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MO3
1. jaybrainer
285
00:02.32
2. hhhhhh2
158
00:02.93
3. numbrr
327
00:03.27
4. daanbe
242
00:03.40
5. PuzzleMaestro
109
00:03.57
6. boru
135
00:03.76
7. hkjsf
162
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
221
00:04.22
10. selahsea
132
00:04.26
AO5
1. jaybrainer
285
00:02.93
2. hhhhhh2
158
00:03.56
3. daanbe
242
00:03.62
4. PuzzleMaestro
109
00:03.76
5. numbrr
327
00:03.85
6. splinkk
12
00:03.99
7. boru
135
00:04.14
8. hkjsf
162
00:04.45
9. Make
288
00:04.46
10. 2015YINJ02
187
00:04.53
AO12
1. jaybrainer
285
00:03.71
2. daanbe
242
00:03.93
3. numbrr
327
00:04.44
4. hhhhhh2
158
00:04.51
5. PuzzleMaestro
109
00:04.90
6. Meerkat
221
00:05.36
7. hkjsf
162
00:05.60
8. 2015YINJ02
187
00:05.70
9. boru
135
00:05.71
10. Make
288
00:06.11
Robots / programmatic solversinfo  
1.siebi
1
00:00.152
2.AutumnWind75
1
00:00.395
3.Paul Bismuth
1
00:00.774

* 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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