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. splinkk
8
00:02.55
2. AntonioIgnacio6060
1
00:03.16
3. ypw19
91
00:03.77
4. giotskh
184
00:04.57
5. qobi
235
00:05.17
6. mfcs3
42
00:05.38
6. missPear
91
00:05.38
8. grimmgirlfandom
169
00:06.04
9. kennethaw88
154
00:06.20
10. Emil1233
49
00:06.31
11. newton77
29
00:06.35
12. Hwellyn
75
00:06.48
13. FlatBottomCloud
106
00:06.52
14. Debbie King
38
00:06.72
15. mbart
73
00:06.78
16. wzh23
7
00:06.92
17. Dorice
266
00:07.44
18. Bhaskar 00:07.51
19. wendua 00:07.69
20. oversizedpixie
133
00:08.03
This Week
1. splinkk
8
00:02.61
2. AntonioIgnacio6060
1
00:03.16
3. mfcs3
42
00:05.38
4. qobi
235
00:05.57
5. grimmgirlfandom
169
00:06.04
6. mbart
73
00:06.78
7. wzh23
7
00:06.92
8. wendua 00:07.69
9. tashhhh 00:08.83
10. mener
5
00:08.92
11. Piotr86a 00:09.42
12. RyanC
6
00:10.20
13. crema
265
00:10.48
14. FengningYang
18
00:10.54
15. Ariadna
35
00:10.55
16. CamPuzzle
5
00:11.21
17. SLinkTechInc 00:11.74
18. MishaVargas
1
00:13.18
19. minnieyao
71
00:13.26
20. Paroni
69
00:13.60
Today
1. tashhhh 00:08.83
2. yzhhh
2
00:17.35
3. ZinnaValley
21
00:23.09
4. JMS2026 00:24.14
5. NJQYMZXXZX 00:36.04
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
260
00:02.32
2. hhhhhh2
144
00:02.93
3. numbrr
313
00:03.27
4. PuzzleMaestro
91
00:03.76
4. boru
126
00:03.76
6. hkjsf
157
00:03.79
7. daanbe
230
00:04.02
8. Meerkat
212
00:04.22
9. haramey
237
00:04.29
10. Arok
115
00:04.33
AO5
1. jaybrainer
260
00:02.93
2. hhhhhh2
144
00:03.56
3. PuzzleMaestro
91
00:03.76
4. numbrr
313
00:03.97
5. daanbe
230
00:03.99
6. boru
126
00:04.14
7. hkjsf
157
00:04.45
8. Make
279
00:04.46
9. Truth-or-Peace
134
00:04.62
10. Meerkat
212
00:04.78
AO12
1. jaybrainer
260
00:03.71
2. hhhhhh2
144
00:04.51
3. numbrr
313
00:04.66
4. PuzzleMaestro
91
00:05.12
5. Meerkat
212
00:05.36
5. daanbe
230
00:05.36
7. hkjsf
157
00:05.60
8. boru
126
00:05.71
9. Make
279
00:06.11
10. Ailurus
185
00:06.39
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:00.774
2.DayliteKaty00:10.556
3.Barth2400:12.837

* 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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