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. mvl666Darkrio
105
00:07.68
2. GoldChoco36
159
00:11.08
3. numbrr
321
00:11.89
4. qobi
237
00:13.70
5. Beercules!
174
00:13.92
6. crema
271
00:14.76
7. MushroomsCavern
90
00:16.74
8. mbart
74
00:16.91
9. tashhhh 00:18.39
10. Debbie King
43
00:18.60
11. May John
99
00:18.91
12. Beastinboston
57
00:19.36
13. Whiz
37
00:19.41
14. 驯龙高手
75
00:19.89
15. ryrycrycry
52
00:21.61
16. kornelbut
45
00:22.83
17. wzh23
8
00:24.58
18. EricLuo123
13
00:24.64
19. daghan
34
00:25.85
20. Rickieman86 00:26.28
This Week
1. GoldChoco36
159
00:11.08
2. numbrr
321
00:11.89
3. qobi
237
00:13.70
4. Beercules!
174
00:13.92
5. May John
99
00:18.91
6. 驯龙高手
75
00:19.89
7. Whiz
37
00:20.85
8. kornelbut
45
00:22.83
9. EricLuo123
13
00:24.64
10. daghan
34
00:25.85
11. Rickieman86 00:26.28
12. windex42
36
00:32.82
13. swissjoe 00:32.88
14. mattlancs
152
00:34.33
15. JustGeee 00:35.74
16. IsseBisse
13
00:36.21
17. Emfine
57
00:41.30
18. AnonyMinor
84
00:50.71
19. FunAcroFly
132
00:50.84
20. Grymhar 00:59.96
Today
1. GoldChoco36
159
00:11.08
2. May John
99
00:18.91
3. windex42
36
00:32.82
4. mattlancs
152
00:34.33
5. vtan
32
01:00.04
6. Rushri 01:07.09
7. Rickieman86 01:15.42
8. Odenzon
33
01:46.90
9. shei
62
01:53.87
10. IJiff
45
03:43.05
11. 1XMvv 04:12.62
12. PLocSugar
2
04:39.13
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. PuzzleMaestro
93
00:08.67
2. daanbe
236
00:09.57
3. numbrr
321
00:09.88
4. hhhhhh2
150
00:10.65
5. Oryn
178
00:11.22
6. Make
282
00:11.34
7. Meerkat
214
00:11.56
8. jaybrainer
266
00:12.05
9. Puzzleist
115
00:13.05
10. qqwref
266
00:13.14
AO5
1. daanbe
236
00:09.76
2. PuzzleMaestro
93
00:09.87
3. numbrr
321
00:11.68
4. Make
282
00:11.87
5. Oryn
178
00:12.02
6. hhhhhh2
150
00:12.68
7. jaybrainer
266
00:13.81
8. Meerkat
214
00:14.05
9. Fastfaxer
131
00:14.16
10. Puzzleist
115
00:14.19
AO12
1. daanbe
236
00:12.13
2. PuzzleMaestro
93
00:12.45
3. numbrr
321
00:14.94
4. Make
282
00:15.29
5. jaybrainer
266
00:16.64
6. hkjsf
160
00:16.91
7. Oryn
178
00:16.97
8. MoFan
120
00:17.56
9. Meerkat
214
00:17.59
10. hhhhhh2
150
00:18.37
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:01.055
2.Elizabeth Tang
1
03:04.647
3.cheard
1
16:51.667

* 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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