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. Reenolex
36
00:25.54
2. MrNyooooom
30
00:30.65
3. Rickieman86 00:34.08
4. MushroomsCavern
120
00:38.80
5. nerdvert
104
00:39.25
6. Silkid
39
00:39.99
7. qobi
240
00:44.20
8. Nieznany 00:48.22
9. missPear
93
00:51.31
10. russellan
71
00:57.47
11. Tomas7407
11
01:00.30
12. shoner
7
01:08.84
13. laries
48
01:09.82
14. Smylic
148
01:09.86
15. wosile
43
01:16.00
16. sandrovka
25
01:22.84
17. Dichterling 01:25.51
18. jorah
101
01:26.64
19. Dorice
271
01:28.81
20. モグモグ
62
01:31.78
This Week
1. MrNyooooom
30
00:30.65
2. Rickieman86 00:34.08
3. MushroomsCavern
120
00:38.80
4. nerdvert
104
00:41.34
5. Nieznany 00:52.75
6. qobi
240
00:59.70
7. shoner
7
01:10.35
8. Tomas7407
11
01:10.51
9. Dichterling 01:25.51
10. BlueOcarina
91
01:46.36
11. _AJ_
13
01:47.06
12. JustGeee 01:58.05
13. Rocketdog
39
02:03.80
14. giacomoperovano
21
02:10.08
15. Opie1234 02:10.89
16. FunAcroFly
142
03:12.87
17. lepetitgenie 03:14.50
18. jeffreym99 03:54.89
19. NaluXV1 05:29.54
20. p1gw1
15
07:22.67
Today
1. shoner
7
01:18.69
2. BlueOcarina
91
01:46.36
3. JustGeee 01:58.05
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. PuzzleMaestro
99
00:24.78
2. daanbe
239
00:26.57
3. Fastfaxer
132
00:28.90
4. numbrr
322
00:30.33
5. Make
286
00:32.40
6. Reenolex
36
00:33.44
7. 2015YINJ02
187
00:34.23
8. Meerkat
214
00:37.39
9.anonymous
42
00:41.66
10. kennethaw88
160
00:41.81
AO5
1. PuzzleMaestro
99
00:25.67
2. daanbe
239
00:30.55
3. numbrr
322
00:31.29
4. Make
286
00:34.73
5. Fastfaxer
132
00:35.99
6. Reenolex
36
00:36.62
7. 2015YINJ02
187
00:37.22
8. Meerkat
214
00:44.16
9. SilverHawk
216
00:44.63
10. kennethaw88
160
00:46.00
AO12
1. PuzzleMaestro
99
00:31.59
2. numbrr
322
00:35.75
3. daanbe
239
00:37.03
4. Reenolex
36
00:43.23
5. Make
286
00:45.20
6. Fastfaxer
132
00:50.57
7. Meerkat
214
00:55.16
8. 2015YINJ02
187
00:55.32
9. SilverHawk
216
00:57.24
10. Oryn
185
00:57.76
Robots / programmatic solversinfo  
1.siebi
1
00:00.154
2.Paul Bismuth
1
00:01.604
3.gazil900:53.440

* 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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