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. gazil 00:24.02
2. kennethaw88
158
00:27.68
3. Reenolex
26
00:40.06
4. laries
45
00:40.15
5. Nieznany 00:43.41
6. Rickieman86 00:45.28
7. nerdvert
102
00:45.38
8. missPear
92
00:47.92
9. gheeler 00:56.03
10. qobi
239
00:56.27
11. Rocketdog
39
00:56.81
12. Jazka 00:58.02
13. sandrovka
17
00:59.88
14. swpomeroy
198
01:00.52
15. Odenzon
40
01:05.76
16. Candyman 01:06.50
17. daghan
34
01:07.68
18. Tomas7407
10
01:08.70
19. JustGeee 01:09.04
20. Kutner17
157
01:09.33
This Week
1. gazil 00:24.02
2. Reenolex
26
00:53.44
3. Nieznany 00:54.67
4. Rickieman86 00:55.40
5. nerdvert
102
00:57.52
6. sandrovka
17
01:00.59
7. laries
45
01:08.77
8. shoner
7
01:19.91
9. qobi
239
01:20.88
10. Tomas7407
10
01:23.53
11. BlueBumblebee
25
01:43.00
12. FunAcroFly
139
01:49.27
13. BlueOcarina
90
01:50.40
14. Odenzon
40
02:04.31
15. JustGeee 02:14.75
16. Opie1234 02:39.48
17. wosile
36
02:51.19
18. super2276 03:21.12
19. Tinkiet 05:11.71
20. Evan
32
06:05.17
Today
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MO3
1. PuzzleMaestro
95
00:24.78
2. daanbe
237
00:26.57
3. Fastfaxer
131
00:28.90
4. numbrr
321
00:30.33
5. Make
285
00:32.40
6. 2015YINJ02
186
00:34.23
7. Meerkat
214
00:37.39
8.anonymous
40
00:41.66
9. kennethaw88
158
00:41.81
10. SilverHawk
216
00:41.97
AO5
1. PuzzleMaestro
95
00:25.67
2. daanbe
237
00:30.55
3. numbrr
321
00:31.29
4. Make
285
00:34.73
5. Fastfaxer
131
00:35.99
6. 2015YINJ02
186
00:37.22
7. Meerkat
214
00:44.16
8. SilverHawk
216
00:44.63
9. kennethaw88
158
00:46.00
10. qqwref
266
00:48.31
AO12
1. PuzzleMaestro
95
00:31.59
2. numbrr
321
00:35.75
3. daanbe
237
00:37.03
4. Make
285
00:45.20
5. Fastfaxer
131
00:50.57
6. Meerkat
214
00:55.16
7. 2015YINJ02
186
00:55.32
8. SilverHawk
216
00:57.24
9. Oryn
181
00:57.76
10. kennethaw88
158
00:58.24
Robots / programmatic solversinfo  
1.siebi
16
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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