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
40
00:25.54
2. MrNyooooom
30
00:30.65
3. Rickieman86 00:34.08
4. MushroomsCavern
123
00:38.80
5. nerdvert
104
00:39.25
6. Silkid
41
00:39.99
7. qobi
240
00:44.20
8. missPear
93
00:51.31
9. Nieznany 00:52.75
10. Efret
15
00:57.02
11. russellan
71
00:57.47
12. Tomas7407
12
01:00.30
13. shoner
7
01:01.08
14. laries
49
01:09.82
15. Smylic
149
01:09.86
16. Alachas
43
01:11.65
17. wosile
56
01:16.00
18. sandrovka
26
01:22.84
19. Dichterling
7
01:25.51
20. jorah
101
01:26.64
This Week
1. Efret
15
00:57.02
2. nerdvert
104
01:03.24
3. Alachas
43
01:11.65
4. shoner
7
01:14.50
5. Tomas7407
12
01:14.72
6. laries
49
01:15.94
7. qobi
240
01:16.41
8. JustGeee 01:28.63
9. giacomoperovano
22
01:56.58
10. Opie1234 01:59.09
11. BlueOcarina
91
02:22.11
12. jeffreym99 02:46.77
13. ineauno
13
03:36.69
14. Efran
51
03:38.05
15. JayeKimZ
31
04:44.01
16. NUUUTE
39
05:11.13
17. Uthor 3d 02:35:55.00
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Today
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MO3
1. PuzzleMaestro
100
00:24.78
2. daanbe
239
00:26.57
3. Fastfaxer
132
00:28.90
4. numbrr
322
00:30.33
5. Make
287
00:32.40
6. Reenolex
40
00:33.44
7. 2015YINJ02
187
00:34.23
8. Meerkat
214
00:37.39
9.anonymous
43
00:41.66
10. kennethaw88
160
00:41.81
AO5
1. PuzzleMaestro
100
00:25.67
2. daanbe
239
00:30.55
3. numbrr
322
00:31.29
4. Make
287
00:34.73
5. Fastfaxer
132
00:35.99
6. Reenolex
40
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
100
00:31.59
2. numbrr
322
00:35.75
3. daanbe
239
00:37.03
4. Reenolex
40
00:43.23
5. Make
287
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
186
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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