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. Oryn
173
04:24.72
2. SweatyBetty 04:31.90
3. kennethaw88
155
04:32.59
4. Parasite03
69
04:54.46
5. Indirica
79
04:54.53
6. cal
75
05:01.39
7. ihaveit 05:02.39
8. dreadsom
108
05:09.34
9. qobi
235
05:16.94
10. BillysName 05:35.49
11. ezyow
30
05:46.46
12. chenh 05:55.92
13. crema
266
06:02.46
14. takaz 06:03.39
15. puzzlingpatzer
93
06:27.56
16. yorcho
83
06:27.60
17. zeroz
1
06:46.53
18. Alachas
29
06:47.18
19. Dorice
267
06:53.70
20. Axin0627 06:54.35
This Week
1. SweatyBetty 04:50.57
2. Parasite03
69
04:54.46
3. cal
75
05:01.39
4. ihaveit 05:02.39
5. dreadsom
108
05:09.34
6. kennethaw88
155
05:10.86
7. qobi
235
05:33.43
8. BillysName 05:35.93
9. ezyow
30
05:46.46
10. crema
266
06:02.46
11. Indirica
79
06:13.01
12. yorcho
83
06:51.06
13. Axin0627 06:54.35
14. profTomi 10:06.65
15. Wuni14 10:25.13
16. Partimento
58
10:36.33
17. bfakos
68
16:06.67
18. Debbie King
38
16:15.41
19. Dorice
267
18:54.69
20. JustGeee 19:08.46
Today
1. qobi
235
09:57.04
2. Axin0627 10:23.39
3. Partimento
58
12:14.44
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
92
03:16.10
2. daanbe
231
03:30.24
3. Make
279
04:16.76
4. MS Paint
105
04:27.61
5. liyan
163
04:41.67
6. Oryn
173
04:51.23
7. 먼지
76
04:51.52
8. sealhy
190
04:51.93
9. Meerkat
212
05:07.02
10. Silkid
24
05:08.03
AO5
1. daanbe
231
03:41.09
2. PuzzleMaestro
92
04:01.67
3. Make
279
04:29.17
4. MS Paint
105
04:41.52
5. Oryn
173
04:55.60
6. sealhy
190
05:11.99
7. Silkid
24
05:15.69
8. 먼지
76
05:18.44
9. Meerkat
212
05:28.16
10. Mia
93
05:36.59
AO12
1. daanbe
231
04:23.96
2. PuzzleMaestro
92
05:08.81
3. Make
279
05:09.81
4. MS Paint
105
05:16.44
5. sealhy
190
05:27.98
6. Oryn
173
05:34.26
7. Meerkat
212
05:57.62
8. 먼지
76
06:08.38
9. Silkid
24
06:12.79
10. Rhododendron
152
06:26.98
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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