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
321
01:14.69
2. Annyamanee
83
02:01.00
3. kennethaw88
157
02:01.76
4. mvl666Darkrio
105
02:13.46
5. PlaidChocobo 02:15.01
6. SilverHawk
216
02:19.81
7. drallyowl2
100
02:21.03
8. qobi
237
02:37.05
9. crema
271
02:37.12
10. MushroomsCavern
90
02:42.69
11. Alachas
37
02:49.24
12. FlatBottomCloud
107
03:14.63
13. mindygame
4
03:41.96
14. mirovic 03:49.94
15. Glen Waldron
10
03:53.99
16. Wuni14 03:56.77
17. Kutner17
156
04:07.94
18. JustGeee 04:09.42
19. Partimento
60
04:23.86
20. Reenolex
4
04:32.49
This Week
1. numbrr
321
01:14.69
2. SilverHawk
216
02:19.81
3. qobi
237
03:06.23
4. JustGeee 04:19.58
5. Rickieman86 05:16.80
6. AlexanderIII 05:31.78
7. Rorschach
14
06:08.46
8. EricLuo123
13
06:14.94
9. Emfine
57
06:45.14
10. Aidans3322 07:46.47
11. Alexia :)
128
08:34.07
12. daghan
34
09:39.72
13. SunnyRo
52
09:57.39
14. ramzy
27
10:31.49
15. Reeeeeeeed 11:42.45
16. Piotr86a 14:38.83
17. piegon
21
24:12.84
18. Grymhar 24:14.59
19. tjw12 26:32.34
20. 1XMvv 35:40.16
Today
1. numbrr
321
01:14.69
2. Rickieman86 05:16.80
3. EricLuo123
13
06:14.94
4. JustGeee 07:23.22
5. Reeeeeeeed 11:42.45
6. Piotr86a 14:38.83
7. 1XMvv 35:40.16
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
93
01:14.11
2. numbrr
321
01:28.75
3. daanbe
236
01:30.65
4. Make
282
01:55.81
5. kennethaw88
157
02:05.21
6. Meerkat
214
02:17.46
7. Annyamanee
83
02:23.83
8. Oryn
178
02:24.23
9. SilverHawk
216
02:26.16
10. cal
76
02:26.39
AO5
1. PuzzleMaestro
93
01:18.55
2. numbrr
321
01:39.40
3. daanbe
236
01:39.69
4. Make
282
02:09.62
5. kennethaw88
157
02:09.93
6. Meerkat
214
02:16.31
7. Fastfaxer
131
02:27.15
8. Annyamanee
83
02:34.84
9. cal
76
02:36.15
10. hkjsf
160
02:36.85
AO12
1. daanbe
236
01:47.02
2. PuzzleMaestro
93
01:48.80
3. numbrr
321
02:21.60
4. Make
282
02:35.50
5. SilverHawk
216
02:55.59
6. Meerkat
214
02:57.52
7.anonymous
145
02:58.57
8. hkjsf
160
02:58.83
9. kennethaw88
157
03:01.70
10. Rhododendron
154
03:04.73
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:03.158
2.--- empty -----:--
3.--- empty -----:--

* 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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