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. missPear
92
00:13.30
2. qobi
239
00:14.17
3. nosleeplong
143
00:14.30
4. mbart
75
00:14.40
5. Reenolex
26
00:14.66
6. JihooLee
21
00:15.94
7. Rickieman86 00:18.36
8. kennethaw88
158
00:19.15
9. Jazka 00:20.08
10. sandrovka
17
00:20.88
11. effek05
46
00:22.85
12. Lynn Bendixsen
152
00:23.78
13. daghan
34
00:24.84
14. russellan
70
00:25.02
15. Odenzon
40
00:26.56
16. Opie1234 00:26.71
17. xilli 00:29.39
18. Lgtwins
106
00:30.93
19. super2276 00:31.26
20. huohuo2004
40
00:31.72
This Week
1. Reenolex
26
00:15.68
2. mbart
75
00:17.06
3. qobi
239
00:24.49
4. russellan
70
00:25.02
5. sandrovka
17
00:26.50
6. Opie1234 00:29.94
7. huohuo2004
40
00:31.72
8. BlueOcarina
90
00:33.48
9. Rocketdog
39
00:33.67
10. Rickieman86 00:37.38
11. simo
21
02:56.78
12. CrlD
122
04:14.22
13. giacomoperovano
2
08:15.44
14. Uthor 3d 19:49:59.42
15.--- empty -----:--
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19.--- empty -----:--
20.--- empty -----:--
Today
1. BlueOcarina
90
01:08.02
2.--- empty -----:--
3.--- empty -----:--
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
95
00:08.67
2. daanbe
237
00:09.57
3. numbrr
321
00:09.88
4. hhhhhh2
154
00:10.65
5. Oryn
181
00:11.22
6. Make
285
00:11.34
7. Meerkat
214
00:11.56
8. 2015YINJ02
186
00:11.59
9. jaybrainer
272
00:12.05
10. Puzzleist
115
00:13.05
AO5
1. daanbe
237
00:09.76
2. PuzzleMaestro
95
00:09.87
3. numbrr
321
00:11.68
4. Make
285
00:11.87
5. Oryn
181
00:12.02
6. 2015YINJ02
186
00:12.47
7. hhhhhh2
154
00:12.68
8. jaybrainer
272
00:13.81
9. Meerkat
214
00:14.05
10. Fastfaxer
131
00:14.16
AO12
1. daanbe
237
00:12.13
2. PuzzleMaestro
95
00:12.45
3. numbrr
321
00:14.94
4. Make
285
00:15.29
5. 2015YINJ02
186
00:15.94
6. jaybrainer
272
00:16.64
7. hkjsf
161
00:16.91
8. Oryn
181
00:16.97
9. MoFan
120
00:17.56
10. Meerkat
214
00:17.59
Robots / programmatic solversinfo  
1.siebi
16
00:00.157
2.Paul Bismuth
1
00:01.055
3.Elizabeth Tang
1
03:04.647

* 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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