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. Reenolex
26
02:21.66
2. PlaidChocobo 02:22.09
3. qobi
239
02:40.45
4. swpomeroy
198
02:50.51
5. Rocketdog
39
02:54.42
6. Rickieman86 03:47.54
7. mirovic 03:50.63
8. Candyman 03:50.85
9. FlatBottomCloud
108
03:54.34
10. nosleeplong
143
04:12.42
11. missPear
92
04:12.64
12. shoner
7
04:21.80
13. JustGeee 04:28.89
14. Jazka 04:34.26
15. sandrovka
17
04:35.96
16. AlexanderIII 05:13.58
17. hq4hq
138
05:14.95
18. RelaxedCockatoo
67
05:17.64
19. Partimento
62
05:25.10
20. Reeeeeeeed 06:30.58
This Week
1. Rocketdog
39
02:54.42
2. PlaidChocobo 02:54.79
3. qobi
239
03:34.81
4. mirovic 03:50.63
5. shoner
7
04:21.80
6. Rickieman86 04:25.27
7. sandrovka
17
05:43.39
8. AlexanderIII 07:01.40
9. darjien 07:16.48
10. BlueBumblebee
25
07:21.22
11. Kukurbo
97
07:38.10
12. JustGeee 07:56.38
13. FunAcroFly
139
14:10.52
14. Odenzon
40
14:45.29
15. giacomoperovano
2
1:04:28.35
16. Uthor 14d 00:44:21.17
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. FunAcroFly
139
14:10.52
2.--- empty -----:--
3.--- empty -----:--
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
95
01:14.11
2. numbrr
321
01:28.75
3. daanbe
237
01:30.65
4. Make
285
01:55.81
5. kennethaw88
158
02:05.21
6. Meerkat
214
02:17.46
7. Annyamanee
84
02:23.83
8. Oryn
181
02:24.23
9. SilverHawk
216
02:26.16
10. cal
77
02:26.39
AO5
1. PuzzleMaestro
95
01:18.55
2. numbrr
321
01:39.40
3. daanbe
237
01:39.69
4. Make
285
02:09.62
5. kennethaw88
158
02:09.93
6. Meerkat
214
02:16.31
7. Fastfaxer
131
02:27.15
8. Annyamanee
84
02:34.84
9. cal
77
02:36.15
10. hkjsf
161
02:36.85
AO12
1. daanbe
237
01:47.02
2. PuzzleMaestro
95
01:48.80
3. numbrr
321
02:21.60
4. Make
285
02:35.50
5. SilverHawk
216
02:55.59
6. Meerkat
214
02:57.52
7.anonymous
152
02:58.57
8. hkjsf
161
02:58.83
9. kennethaw88
158
03:01.70
10. Rhododendron
161
03:04.73
Robots / programmatic solversinfo  
1.siebi
16
00:00.157
2.Paul Bismuth
1
00:03.158
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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