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. kennethaw88
160
00:03.01
2. splinkk
12
00:03.31
3. shoner
7
00:03.62
4. Reenolex
36
00:03.87
5. Rickieman86 00:04.08
6. missPear
93
00:04.48
7. russellan
71
00:04.73
8. MrNyooooom
30
00:05.15
9. Dichterling 00:05.57
10. Jazka 00:05.67
11. qobi
240
00:05.87
12. alexlex
88
00:06.20
13. CamPuzzle
39
00:06.41
14. NickB15 00:06.84
15. Smylic
148
00:07.04
16. Rocketdog
39
00:07.51
17. darjien 00:07.72
18. BlueOcarina
91
00:07.73
19. AuroraSrc
48
00:07.92
20. BigHeadGriffin
18
00:08.37
This Week
1. splinkk
12
00:03.31
2. russellan
71
00:04.73
3. NickB15 00:06.84
4. Dichterling 00:07.48
5. BlueOcarina
91
00:07.73
6. daspore 00:09.74
7. vbe-elvis
5
00:10.63
7. Viktoria S.
54
00:10.63
9. gakkinkoo 00:10.80
10. IanTheG
14
00:12.26
11. qobi
240
00:12.47
12. giacomoperovano
21
00:13.46
13. Alex Moore
9
00:15.25
14. Opie1234 00:16.53
15. Martin112358
5
00:22.51
16. VJW
34
00:32.17
17. grimeyatlarge
42
00:38.88
18. ineauno
12
00:40.32
19. oli217 00:42.70
20. Teo M. M.
6
00:49.01
Today
1. Dichterling 00:10.07
2. BlueOcarina
91
00:14.09
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10.--- empty -----:--
11.--- empty -----:--
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20.--- empty -----:--
MO3
1. jaybrainer
275
00:02.32
2. hhhhhh2
156
00:02.93
3. numbrr
322
00:03.27
4. daanbe
239
00:03.40
5. PuzzleMaestro
99
00:03.57
6. boru
132
00:03.76
7. hkjsf
161
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
214
00:04.22
10. selahsea
130
00:04.26
AO5
1. jaybrainer
275
00:02.93
2. hhhhhh2
156
00:03.56
3. daanbe
239
00:03.62
4. PuzzleMaestro
99
00:03.76
5. numbrr
322
00:03.97
6. splinkk
12
00:03.99
7. boru
132
00:04.14
8. hkjsf
161
00:04.45
9. Make
286
00:04.46
10. 2015YINJ02
187
00:04.53
AO12
1. jaybrainer
275
00:03.71
2. daanbe
239
00:03.93
3. hhhhhh2
156
00:04.51
4. numbrr
322
00:04.66
5. PuzzleMaestro
99
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
161
00:05.60
8. 2015YINJ02
187
00:05.70
9. boru
132
00:05.71
10. Make
286
00:06.11
Robots / programmatic solversinfo  
1.siebi
1
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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