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

This Month
1. Truth-or-Peace
132
00:02.79
2. Hwellyn
75
00:03.41
3. GoldChoco36
152
00:03.80
4. Ariadna
34
00:04.61
5. missPear
90
00:04.80
6. froz3n_
85
00:05.18
7. Kutner17
152
00:05.19
8. Meerkat
211
00:05.40
8. RelaxedCockatoo
67
00:05.40
10. mfcs3
42
00:05.73
11. Jbrunt
142
00:05.99
12. Kukko
164
00:06.51
13. grimmgirlfandom
169
00:06.52
14. qobi
234
00:06.60
15. fishysua
154
00:07.12
16. cruadin
121
00:07.22
17. Vendetta907
94
00:07.43
18. limima
41
00:07.53
19. NormalSurface#7622
53
00:07.66
20. Finger Shi
31
00:07.97
This Week
1. qobi
234
00:07.06
2. Vendetta907
94
00:07.43
3. yvhkgys
34
00:07.99
4. CroMa
87
00:08.08
5. Kutner17
152
00:08.81
6. cruiser721
51
00:10.01
7. MishaVargas
1
00:10.05
8. xilli 00:11.09
9. S Otenkiya
59
00:12.33
10. Wuni14 00:17.04
11. franklxr 00:28.73
12. mirella0404
1
00:37.29
13. Jefferson111222
16
00:39.38
14. Ariadna
34
00:47.27
15. Nemo Waters
9
01:08.61
16. Matija Klančar
7
06:52.61
17. drbop
49
38:42.45
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. yvhkgys
34
00:07.99
2. qobi
234
00:09.06
3. MishaVargas
1
00:10.05
4. Ariadna
34
00:47.27
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
254
00:02.32
2. hhhhhh2
142
00:02.93
3. numbrr
309
00:03.27
4. PuzzleMaestro
90
00:03.76
4. boru
124
00:03.76
6. hkjsf
153
00:03.79
7. daanbe
223
00:04.02
8. Meerkat
211
00:04.22
9. haramey
236
00:04.29
10. Arok
115
00:04.33
AO5
1. jaybrainer
254
00:02.93
2. hhhhhh2
142
00:03.56
3. PuzzleMaestro
90
00:03.76
4. numbrr
309
00:03.97
5. daanbe
223
00:03.99
6. boru
124
00:04.14
7. hkjsf
153
00:04.45
8. Make
279
00:04.46
9. Truth-or-Peace
132
00:04.62
10. Meerkat
211
00:04.78
AO12
1. jaybrainer
254
00:03.71
2. hhhhhh2
142
00:04.51
3. numbrr
309
00:04.66
4. PuzzleMaestro
90
00:05.12
5. Meerkat
211
00:05.36
5. daanbe
223
00:05.36
7. hkjsf
153
00:05.60
8. boru
124
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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2026-03-11 19:41:32

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