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. Silkid
42
03:12.65
2. Reenolex
42
03:57.54
3. qobi
241
04:38.55
4. takaz 04:39.36
5. SweatyBetty 04:45.87
6. dreadsom
111
04:46.39
7. Rickieman86 05:30.30
8. BillysName 05:56.35
9. LesAM 07:00.31
10. wendylll
57
07:46.90
11. profTomi 07:50.68
12. vedpaliwal
62
07:58.62
13. Partimento
63
08:26.25
14. russellan
71
08:39.31
15. junior16u17 08:54.88
16. Beastinboston
64
09:01.40
17. JustGeee 09:19.67
18. Tomas7407
13
09:22.94
19. bowik
69
09:34.21
20. Smylic
149
09:45.43
This Week
1. Silkid
42
03:12.65
2. dreadsom
111
05:29.99
3. Rickieman86 05:30.30
4. LesAM 07:00.31
5. qobi
241
07:39.66
6. Partimento
63
08:26.25
7. junior16u17 08:54.88
8. JustGeee 09:19.67
9. Tomas7407
13
09:22.94
10. Pertyian 10:02.00
11. josim 12:03.82
12. bowik
69
12:20.10
13. darjien 12:43.87
14. issal 13:22.55
15. sandrovka
30
15:41.95
16. russellan
71
21:42.16
17. giacomoperovano
27
25:25.99
18. lepetitgenie 28:39.75
19. BIGDlittled 39:41.43
20. AzuReVaPouR 59:06.97
Today
1. russellan
71
21:42.16
2.--- empty -----:--
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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 -----:--
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19.--- empty -----:--
20.--- empty -----:--
MO3
1. liyan
165
02:52.98
2. PuzzleMaestro
101
03:16.10
3. daanbe
240
03:30.24
4. Silkid
42
03:41.65
5.anonymous
322
03:54.85
6. Reenolex
42
03:56.55
7. Make
288
04:16.76
8. MS Paint
110
04:27.61
9. 먼지
88
04:31.96
10. mslamhoa
237
04:39.63
AO5
1. liyan
165
03:31.22
2. daanbe
240
03:41.09
3. Silkid
42
03:42.22
4.anonymous
322
03:51.81
5. Reenolex
42
04:00.46
6. PuzzleMaestro
101
04:01.67
7. Make
288
04:29.17
8. 먼지
88
04:38.70
9. MS Paint
110
04:41.52
10. Oryn
188
04:55.60
AO12
1. Silkid
42
03:56.65
2. Reenolex
42
04:18.34
3.anonymous
322
04:22.67
4. daanbe
240
04:23.96
5. PuzzleMaestro
101
05:08.81
6. Make
288
05:09.81
7. MS Paint
110
05:16.44
8. mslamhoa
237
05:21.25
9. sealhy
201
05:27.98
10. Oryn
188
05:34.26
Robots / programmatic solversinfo  
1.siebi
1
00:00.184
2.Paul Bismuth
1
00:05.669
3.xiaruizebot00:18.220

* 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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