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
36
03:02.94
2. adminusff 04:17.99
3. takaz 04:39.36
4. NBGalli 04:39.68
5. drallyowl2
101
04:41.44
6. dreadsom
111
04:46.39
7. zeroz
1
05:17.42
8. SweatyBetty 05:24.67
9. BillysName 05:56.35
10. crema
274
06:29.57
11. qobi
240
06:30.45
12. xzaxzaazx
110
07:13.95
13. RForce
72
07:36.48
14. wendylll
57
07:46.90
15. profTomi 07:50.68
16. yorcho
89
07:53.59
17. alexlex
88
07:55.46
18. Rickieman86 07:56.23
19. LesAM 08:12.31
20. russellan
71
08:39.31
This Week
1. takaz 04:39.36
2. dreadsom
111
05:12.18
3. profTomi 08:26.36
4. wendylll
57
08:48.12
5. shoner
7
10:10.44
6. Smylic
148
11:27.09
7. junior16u17 12:02.15
8. issal 12:47.00
9. Rickieman86 14:28.40
10. Pertyian 14:50.94
11. Rorschach
15
15:08.17
12. darjien 17:10.40
13. JustGeee 19:59.57
14. qobi
240
21:19.43
15. lepetitgenie 22:08.44
16. Skemmer 32:37.31
17. giacomoperovano
21
33:01.77
18. daghan
34
42:09.58
19.--- empty -----:--
20.--- empty -----:--
Today
1. profTomi 08:52.58
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3.--- empty -----:--
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5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
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13.--- empty -----:--
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16.--- empty -----:--
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20.--- empty -----:--
MO3
1. liyan
165
02:52.98
2. PuzzleMaestro
99
03:16.10
3. daanbe
239
03:30.24
4. Silkid
39
03:46.23
5. numbrr
322
03:54.85
6. Reenolex
36
03:56.55
7. Make
286
04:16.76
8. MS Paint
109
04:27.61
9. 먼지
87
04:31.96
10. mslamhoa
236
04:39.63
AO5
1. liyan
165
03:31.22
2. daanbe
239
03:41.09
3. numbrr
322
03:51.81
4. Reenolex
36
04:00.46
5. PuzzleMaestro
99
04:01.67
6. Silkid
39
04:11.50
7. Make
286
04:29.17
8. 먼지
87
04:38.70
9. MS Paint
109
04:41.52
10. Oryn
185
04:55.60
AO12
1. Reenolex
36
04:18.34
2. numbrr
322
04:22.67
3. daanbe
239
04:23.96
4. Silkid
39
04:28.42
5. PuzzleMaestro
99
05:08.81
6. Make
286
05:09.81
7. MS Paint
109
05:16.44
8. mslamhoa
236
05:21.25
9. sealhy
200
05:27.98
10. Oryn
185
05:34.26
Robots / programmatic solversinfo  
1.siebi
1
00:00.184
2.Paul Bismuth
1
00:05.669
3.xiaruizebot00:18.220

* 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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