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
00:56.21
2. plang2008
61
01:53.18
3. PlaidChocobo 02:12.24
4. qobi
243
02:16.53
5. Rickieman86
14
02:37.85
6. takaz 02:51.70
7. Partimento
66
02:52.95
8. zeroz
1
02:58.62
9. shoner
7
02:58.97
10. JustGeee 03:25.15
11. daspore 03:26.25
12. Reticle
137
03:44.52
13. mkmk
92
04:12.13
14. AlexanderIII 04:23.00
15. Savia
88
04:26.03
16. insanebrain 04:40.85
17. jeffreym99 05:37.59
18. Rocketdog
45
05:43.41
19. xilli 05:46.74
20. wyq97 06:53.44
This Week
1. numbrr
327
02:03.40
2. PlaidChocobo 02:12.24
3. Rickieman86
14
02:44.05
4. qobi
243
02:44.79
5. mkmk
92
04:14.17
6. shoner
7
04:38.27
7. AlexanderIII 04:43.44
8. Partimento
66
05:29.52
9. daspore 05:53.77
10. jeffreym99 05:57.74
11. wyq97 06:53.44
12. Joyous1 07:23.68
13. josim 07:42.37
14. Einsteinus
127
08:36.14
15. Zerozeddy1
86
09:04.44
16. PeterP3
21
20:23.43
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Today
1. Joyous1 07:23.68
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3.--- empty -----:--
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5.--- empty -----:--
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8.--- empty -----:--
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MO3
1. PuzzleMaestro
109
01:14.11
2. numbrr
327
01:26.89
3. daanbe
242
01:30.65
4. Silkid
48
01:47.79
5. Reenolex
45
01:50.57
6. Make
288
01:55.81
7. kennethaw88
164
02:05.21
8. Meerkat
221
02:17.46
9. Reglect
211
02:23.43
10. Annyamanee
85
02:23.83
AO5
1. PuzzleMaestro
109
01:18.55
2. numbrr
327
01:28.48
3. daanbe
242
01:39.69
4. Silkid
48
01:50.12
5. Reenolex
45
01:52.77
6. Make
288
02:09.62
7. kennethaw88
164
02:09.93
8. Meerkat
221
02:16.31
9. Fastfaxer
132
02:27.15
10. Moonshine
34
02:28.81
AO12
1. daanbe
242
01:47.02
2. PuzzleMaestro
109
01:48.80
3. numbrr
327
01:58.31
4. Reenolex
45
02:08.40
5. Silkid
48
02:10.99
6. Make
288
02:35.50
7. Reglect
211
02:48.77
8. SilverHawk
216
02:55.59
9. Meerkat
221
02:57.52
10. ElatedPuffin
157
02:58.57
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.AutumnWind75
1
00:00.573
3.Paul Bismuth
1
00:03.158

* 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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