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. SilverHawk
216
01:44.48
2. kennethaw88
158
01:58.09
3. Reenolex
19
02:21.66
4. PlaidChocobo 02:22.09
5. qobi
239
02:24.16
6. nosleeplong
143
02:29.31
7. swpomeroy
198
02:50.51
8. mirovic 03:46.26
9. Rickieman86 03:47.54
10. Candyman 03:50.85
11. FlatBottomCloud
108
03:54.34
12. LesAM 03:59.23
13. Partimento
62
03:59.73
14. nerdvert
102
04:04.25
15. Wuni14 04:08.23
16. JustGeee 04:28.89
17. shei
79
04:29.30
18. Jazka 04:34.26
19. sandrovka
14
04:38.49
20. missPear
92
04:44.95
This Week
1. PlaidChocobo 02:22.09
2. qobi
239
03:04.27
3. Rickieman86 03:47.54
4. JustGeee 04:28.89
5. Jazka 04:34.26
6. sandrovka
14
04:38.49
7. hq4hq
137
05:14.95
8. AlexanderIII 05:17.31
9. shoner
7
05:18.31
10. missPear
92
07:02.38
11. Dorice
271
07:08.17
12. laries
43
08:44.93
13. Lynn Bendixsen
151
10:08.16
14. Odenzon
38
11:03.87
15. Tomas7407
1
11:30.19
16. Accelec 12:36.13
17. Gungnir1618 16:34.92
18. BlueOcarina
90
16:51.28
19. Uthor 14d 04:22:34.90
20.--- empty -----:--
Today
1. sandrovka
14
05:47.60
2. BlueOcarina
90
19:54.51
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
94
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
180
02:24.23
9. SilverHawk
216
02:26.16
10. cal
77
02:26.39
AO5
1. PuzzleMaestro
94
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
94
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
150
02:58.57
8. hkjsf
161
02:58.83
9. kennethaw88
158
03:01.70
10. Rhododendron
157
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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