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
00:03.40
2. splinkk
12
00:03.64
3. SilverHawk
216
00:03.86
4. LoonyGoober 00:04.14
5. big_rich
23
00:04.22
6. rozer
211
00:04.28
7. Reenolex
19
00:04.31
8. JihooLee
20
00:04.50
9. effek05
39
00:04.60
10. Itseemslikeme 00:04.61
11. BillysName 00:04.75
12. NickB15 00:04.98
13. qobi
239
00:04.99
14. shei
79
00:05.23
15. OnTheScoreboard 00:05.68
16. NBGalli 00:05.73
17. Hwellyn
75
00:06.08
18. cryptOakmont 00:06.21
19. Lynn Bendixsen
151
00:06.29
20. mbart
75
00:06.78
This Week
1. missPear
92
00:03.40
2. splinkk
12
00:04.76
3. NickB15 00:04.98
4. Lynn Bendixsen
151
00:06.29
5. qobi
239
00:06.81
6. Nebbo 00:08.10
7. shoner
7
00:08.91
8. Rickieman86 00:09.57
9. sandrovka
14
00:09.63
10. BlueOcarina
90
00:09.70
11. OuO Seal
19
00:09.88
12. MEOWMILLAKAT
15
00:10.09
13. darjien 00:10.61
14. Odenzon
38
00:11.20
15. profTomi 00:12.08
16. AuroraSrc
48
00:12.23
17. Opie1234 00:12.59
18. viysid
25
00:12.97
19. Antoni200292
26
00:30.12
20. mimi908 00:32.90
Today
1. OuO Seal
19
00:09.88
2. sandrovka
14
00:19.32
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. jaybrainer
271
00:02.32
2. hhhhhh2
153
00:02.93
3. numbrr
321
00:03.27
4. daanbe
237
00:03.40
5. PuzzleMaestro
94
00:03.57
6. boru
131
00:03.76
7. hkjsf
161
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
214
00:04.22
10. selahsea
128
00:04.26
AO5
1. jaybrainer
271
00:02.93
2. hhhhhh2
153
00:03.56
3. daanbe
237
00:03.62
4. PuzzleMaestro
94
00:03.76
5. numbrr
321
00:03.97
6. splinkk
12
00:03.99
7. boru
131
00:04.14
8. hkjsf
161
00:04.45
9. Make
285
00:04.46
10. selahsea
128
00:04.60
AO12
1. jaybrainer
271
00:03.71
2. daanbe
237
00:03.93
3. hhhhhh2
153
00:04.51
4. numbrr
321
00:04.66
5. PuzzleMaestro
94
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
161
00:05.60
8. boru
131
00:05.71
9. Make
285
00:06.11
10. Ailurus
186
00:06.39
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:00.774
2.shumiao5
1
00:04.861
3.DayliteKaty00:10.556

* 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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