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. PuzzleMaestro
92
01:13.65
2. cal
75
01:54.42
3. Oryn
173
01:59.78
4. Reticle
128
02:23.67
5. crema
266
02:29.49
6. qobi
235
02:30.48
7. Dorice
267
02:33.25
8. kennethaw88
155
02:45.90
9. Alachas
29
02:53.77
10. PlaidChocobo 02:54.32
11. yorcho
83
03:06.06
12. takaz 03:07.19
13. missPear
91
03:28.20
14. Solanya
59
03:30.39
15. mvl666Darkrio
104
03:32.59
16. nerdvert
100
03:40.61
17. Partimento
58
03:49.40
18. mkmk
89
04:05.08
19. mirovic 04:05.32
20. Wuni14 04:22.88
This Week
1. cal
75
01:54.42
2. Dorice
267
02:33.25
3. Alachas
29
02:56.46
4. crema
266
03:00.50
5. yorcho
83
03:06.06
6. Solanya
59
03:30.39
7. mvl666Darkrio
104
03:32.59
8. qobi
235
03:55.85
9. mkmk
89
04:05.08
10. mirovic 04:05.32
11. JustGeee 05:17.54
12. AlexanderIII 06:09.92
13. Wuni14 06:29.98
14. yosiaki
107
06:50.54
15. whx
37
07:37.83
16. 人外
8
12:47.38
17. Nikopol
18
47:24.03
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. mkmk
89
04:05.08
2. qobi
235
06:22.69
3. AlexanderIII 07:59.51
4. Nikopol
18
47:24.03
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
92
01:14.11
2. daanbe
231
01:30.65
3. Make
279
01:55.81
4. numbrr
314
02:11.26
5. Meerkat
212
02:17.46
6. Annyamanee
82
02:23.83
7. Oryn
173
02:24.23
8. kennethaw88
155
02:25.12
9. cal
75
02:26.39
10. Fastfaxer
131
02:29.46
AO5
1. PuzzleMaestro
92
01:18.55
2. daanbe
231
01:39.69
3. Make
279
02:09.62
4. Meerkat
212
02:16.31
5. Fastfaxer
131
02:27.15
6. numbrr
314
02:28.34
7. Annyamanee
82
02:34.84
8. cal
75
02:36.15
9. Rhododendron
152
02:45.01
10. hkjsf
158
02:46.45
AO12
1. daanbe
231
01:47.02
2. PuzzleMaestro
92
01:48.80
3. Make
279
02:35.50
4. Meerkat
212
02:57.52
5.anonymous
142
02:58.57
6. Rhododendron
152
03:04.73
7. Robert van den Broek
75
03:04.88
8. numbrr
314
03:06.03
9. qqwref
266
03:13.39
10. Fastfaxer
131
03:16.86
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:03.158
2.--- empty -----:--
3.--- empty -----:--

* 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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