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. big_rich
23
00:04.22
3. rozer
212
00:04.28
4. Reenolex
26
00:04.31
5. JihooLee
21
00:04.50
6. effek05
46
00:04.60
7. Itseemslikeme 00:04.61
8. BillysName 00:04.75
9. splinkk
12
00:04.76
10. mbart
75
00:04.88
11. NickB15 00:04.98
12. Piotr86a 00:05.69
13. qobi
239
00:05.94
14. Lynn Bendixsen
152
00:06.29
15. darjien 00:06.69
16. Rickieman86 00:06.76
17. Rocketdog
39
00:07.51
18. profTomi 00:07.83
19. adiconejito
10
00:07.89
20. AuroraSrc
48
00:07.92
This Week
1. Piotr86a 00:05.69
2. NickB15 00:06.69
2. darjien 00:06.69
4. Rickieman86 00:06.76
5. qobi
239
00:07.18
6. Rocketdog
39
00:07.51
7. adiconejito
10
00:07.89
8. AuroraSrc
48
00:07.92
9. BlueOcarina
90
00:09.03
10. Efran
50
00:10.17
11. sandrovka
17
00:10.43
12. 0jacky0
19
00:10.75
13. huohuo2004
40
00:11.71
14. MEOWMILLAKAT
15
00:11.90
15. PANPAN
25
00:12.89
16. Opie1234 00:14.00
17. shoner
7
00:14.56
18. Nebbo 00:15.67
19. Reenolex
26
00:16.86
20. BlueBumblebee
25
00:17.04
Today
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MO3
1. jaybrainer
272
00:02.32
2. hhhhhh2
154
00:02.93
3. numbrr
321
00:03.27
4. daanbe
237
00:03.40
5. PuzzleMaestro
95
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
272
00:02.93
2. hhhhhh2
154
00:03.56
3. daanbe
237
00:03.62
4. PuzzleMaestro
95
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. 2015YINJ02
186
00:04.53
AO12
1. jaybrainer
272
00:03.71
2. daanbe
237
00:03.93
3. hhhhhh2
154
00:04.51
4. numbrr
321
00:04.66
5. PuzzleMaestro
95
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
161
00:05.60
8. 2015YINJ02
186
00:05.70
9. boru
131
00:05.71
10. Make
285
00:06.11
Robots / programmatic solversinfo  
1.siebi
16
00:00.152
2.Paul Bismuth
1
00:00.774
3.shumiao5
1
00:04.861

* 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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