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. liyan
164
02:41.37
2. numbrr
321
02:41.53
3. Silkid
32
03:37.72
4. romromi 03:52.24
5. kennethaw88
157
04:20.46
6. SweatyBetty 04:27.59
7. crema
271
04:43.04
8. Paroni
70
04:43.63
9. kikikik
15
04:55.69
10. SilverHawk
216
05:13.04
11. BillysName 05:14.35
12. dreadsom
109
05:14.38
13. RForce
71
05:25.70
14. drallyowl2
100
05:30.31
15. zeroz
1
05:38.83
16. ihaveit 05:47.53
17. Reenolex
4
06:21.79
18. Ceceri 06:26.49
19. xzaxzaazx
109
06:36.65
20. qobi
237
06:49.99
This Week
1. numbrr
321
02:41.53
2. Silkid
32
03:37.72
3. kikikik
15
04:55.69
4. SilverHawk
216
05:13.04
5. dreadsom
109
05:22.96
6. drallyowl2
100
05:30.31
7. SweatyBetty 05:34.38
8. zeroz
1
05:48.10
9. Reenolex
4
06:21.79
10. xzaxzaazx
109
06:36.65
11. ihaveit 06:42.26
12. BillysName 06:54.59
13. romromi 07:09.27
14. JihooLee
7
07:29.71
15. qobi
237
07:44.72
16. nosenugget
145
08:43.14
17. not2sleepy
79
09:20.84
18. swpomeroy
196
09:29.38
19. profTomi 10:16.85
20. kornelbut
45
10:21.67
Today
1. Silkid
32
03:37.72
2. dreadsom
109
06:03.90
3. drallyowl2
100
06:09.20
4. xzaxzaazx
109
06:36.65
5. SilverHawk
216
09:06.56
6. JihooLee
7
10:37.59
7. wendylll
55
12:51.08
8. Partimento
60
15:16.31
9. Rickieman86 15:36.56
10. ChibiHoshi
19
27:48.50
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. PuzzleMaestro
93
03:16.10
2. daanbe
236
03:30.24
3. liyan
164
03:35.62
4. numbrr
321
03:54.85
5. Make
282
04:16.76
6. Silkid
32
04:22.99
7. MS Paint
105
04:27.61
8. 먼지
81
04:31.96
9. mslamhoa
232
04:39.63
10. Oryn
178
04:51.23
AO5
1. daanbe
236
03:41.09
2. numbrr
321
03:51.81
3. PuzzleMaestro
93
04:01.67
4. liyan
164
04:04.40
5. Make
282
04:29.17
6. Silkid
32
04:35.59
7. 먼지
81
04:38.70
8. MS Paint
105
04:41.52
9. Oryn
178
04:55.60
10. mslamhoa
232
04:59.01
AO12
1. numbrr
321
04:22.67
2. daanbe
236
04:23.96
3. PuzzleMaestro
93
05:08.81
4. Make
282
05:09.81
5. Silkid
32
05:11.49
6. MS Paint
105
05:16.44
7. mslamhoa
232
05:21.25
8. sealhy
197
05:27.98
9. Oryn
178
05:34.26
10. Meerkat
214
05:57.62
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:05.669
2.xiaruizebot00:18.220
3.Linomenium11:05:14.982

* 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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