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. plang2008
61
00:09.52
2. mbart
77
00:13.76
3. qobi
243
00:14.47
4. Opie1234 00:15.13
5. Rickieman86
14
00:15.53
6. NyoomCat 00:19.21
7. Dichterling
11
00:19.52
8. daspore 00:20.87
9. Oryn
196
00:24.09
10. wu500 00:29.78
11. BlueOcarina
92
00:30.07
12. Zerozeddy1
86
00:30.10
13. DewyMeteor
9
00:31.57
14. wyq97 00:31.80
15. kingofnumbers
13
00:32.64
16. PeterP3
21
00:33.50
17. sandrovka
33
00:33.58
18. Alextaz
20
00:33.86
19. KingKahuka 00:34.02
20. shoner
7
00:34.65
This Week
1. qobi
243
00:14.47
2. mbart
77
00:17.21
3. NyoomCat 00:25.01
4. Dichterling
11
00:25.02
5. Opie1234 00:30.38
6. PeterP3
21
00:33.50
7. Alextaz
20
00:33.86
8. KingKahuka 00:34.02
9. shoner
7
00:34.65
10. sandrovka
33
00:41.48
11. Chezzik
49
01:12.00
12. Jfisher 02:15.86
13. iValerie
3
03:28.22
14. Kannhd 03:31.15
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Today
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MO3
1. PuzzleMaestro
109
00:08.67
2. daanbe
242
00:09.57
3. numbrr
327
00:09.88
4. hhhhhh2
158
00:10.65
5. Silkid
48
00:10.82
6. Oryn
196
00:11.22
7. Make
288
00:11.34
8. Meerkat
221
00:11.56
9. 2015YINJ02
187
00:11.59
10. jaybrainer
285
00:12.05
AO5
1. daanbe
242
00:09.76
2. PuzzleMaestro
109
00:09.87
3. numbrr
327
00:11.68
4. Make
288
00:11.87
5. Oryn
196
00:12.02
6. Silkid
48
00:12.09
7. 2015YINJ02
187
00:12.47
8. hhhhhh2
158
00:12.68
9. jaybrainer
285
00:13.81
10. Meerkat
221
00:14.05
AO12
1. daanbe
242
00:12.13
2. PuzzleMaestro
109
00:12.45
3. numbrr
327
00:14.94
4. Make
288
00:15.29
5. Silkid
48
00:15.45
6. 2015YINJ02
187
00:15.94
7. jaybrainer
285
00:16.64
8. hkjsf
162
00:16.91
9. Oryn
196
00:16.97
10. MoFan
120
00:17.56
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.AutumnWind75
1
00:00.428
3.Paul Bismuth
1
00:01.055

* 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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