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
40
01:20.12
2. Silkid
41
01:47.94
3. MrNyooooom
30
02:35.60
4. takaz 02:41.95
5. Rickieman86 02:59.52
6. PlaidChocobo 03:03.72
7. AlexanderIII 03:05.03
8. qobi
240
03:08.96
9. Smylic
149
03:13.83
10. missPear
93
03:14.88
11. Rocketdog
40
03:37.38
12. Candyman 03:43.16
13. shoner
7
04:01.65
14. sandrovka
26
04:20.54
15. mkmk
91
04:24.00
16. JustGeee 04:29.51
17. russellan
71
04:50.78
18. Akuma LI
77
05:01.83
19. vedpaliwal
61
05:14.59
20. Dorice
272
05:43.56
This Week
1. Silkid
41
01:47.94
2. MrNyooooom
30
02:35.60
3. PlaidChocobo 03:03.72
4. AlexanderIII 03:05.03
5. Candyman 03:43.16
6. shoner
7
04:01.65
7. Rickieman86 04:05.43
8. qobi
240
04:43.01
9. mkmk
91
04:51.88
10. Rocketdog
40
04:53.89
11. Akuma LI
77
05:01.83
12. JustGeee 05:07.92
13. takaz 05:24.64
14. fengkun yang
125
05:52.56
15. bowik
69
06:36.98
16. russellan
71
09:10.52
17. jeffreym99 11:10.95
18. Uthor 24d 20:31:23.64
19.--- empty -----:--
20.--- empty -----:--
Today
1. Uthor 24d 20:31:23.64
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3.--- empty -----:--
4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
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8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
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15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. PuzzleMaestro
100
01:14.11
2. numbrr
322
01:28.75
3. daanbe
239
01:30.65
4. Silkid
41
01:47.79
5. Reenolex
40
01:50.57
6. Make
287
01:55.81
7. kennethaw88
160
02:05.21
8. Meerkat
214
02:17.46
9. Annyamanee
84
02:23.83
10. Oryn
186
02:24.23
AO5
1. PuzzleMaestro
100
01:18.55
2. numbrr
322
01:39.40
3. daanbe
239
01:39.69
4. Silkid
41
01:50.12
5. Reenolex
40
01:52.77
6. Make
287
02:09.62
7. kennethaw88
160
02:09.93
8. Meerkat
214
02:16.31
9. Fastfaxer
132
02:27.15
10. Annyamanee
84
02:34.84
AO12
1. daanbe
239
01:47.02
2. PuzzleMaestro
100
01:48.80
3. Reenolex
40
02:08.40
4. Silkid
41
02:10.99
5. numbrr
322
02:21.60
6. Make
287
02:35.50
7. SilverHawk
216
02:55.59
8. Meerkat
214
02:57.52
9.anonymous
154
02:58.57
10. hkjsf
161
02:58.83
Robots / programmatic solversinfo  
1.siebi
1
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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