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. gazil 00:09.05
2. missPear
90
00:10.59
3. Oryn
168
00:12.82
4. mfcs3
42
00:13.39
5. Meerkat
211
00:13.70
6. ypw19
87
00:14.47
7. Jbrunt
138
00:14.89
8. NormalSurface#7622
53
00:19.99
9. qobi
234
00:20.44
10. dingeldrum
42
00:22.50
11. mvl666Darkrio
102
00:23.50
12. mbart
72
00:23.83
13. Dorice
263
00:24.66
14. Partimento
54
00:25.74
15. S Otenkiya
58
00:27.09
16. Alachas
21
00:28.55
17. grimmgirlfandom
168
00:29.69
18. yosiaki
103
00:33.04
19. Tuffi
29
00:33.72
20. MishaVargas
1
00:34.27
This Week
1. missPear
90
00:10.59
2. Oryn
168
00:12.82
3. qobi
234
00:21.31
4. Dorice
263
00:31.16
5. Geppetto 00:34.51
6. MishaVargas
1
00:39.68
7. Hammernose
5
00:47.24
8. fishysua
154
00:48.33
9. Ariadna
33
01:03.45
10. Efran
50
02:14.17
11. Justin Heath
96
02:31.50
12.--- empty -----:--
13.--- empty -----:--
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15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. qobi
234
00:21.31
2.--- empty -----:--
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. numbrr
308
00:09.88
2. PuzzleMaestro
89
00:09.91
3. hhhhhh2
140
00:10.65
4. daanbe
222
00:10.90
5. Make
278
00:11.34
6. Meerkat
211
00:11.56
7. Oryn
168
00:11.93
8. jaybrainer
253
00:12.05
9. Puzzleist
115
00:13.05
10. qqwref
266
00:13.14
AO5
1. PuzzleMaestro
89
00:10.08
2. numbrr
308
00:11.68
3. Make
278
00:11.87
4. Oryn
168
00:12.02
5. daanbe
222
00:12.36
6. hhhhhh2
140
00:12.68
7. jaybrainer
253
00:13.81
8. Meerkat
211
00:14.05
9. Fastfaxer
130
00:14.16
10. Puzzleist
115
00:14.19
AO12
1. PuzzleMaestro
89
00:12.45
2. daanbe
222
00:15.25
3. Make
278
00:15.29
4. jaybrainer
253
00:16.64
5. hkjsf
152
00:16.91
6. Oryn
168
00:16.97
7. numbrr
308
00:17.49
8. MoFan
119
00:17.56
9. Meerkat
211
00:17.59
10. hhhhhh2
140
00:18.37
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:01.055
2.Elizabeth Tang
1
03:04.647
3.QiRiver
1
27:53.962

* 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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2026-03-01 04:01:58

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