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.numbrr
329
00:52.11
2.nosleeplong
147
01:45.99
3.PlaidChocobo 02:12.24
4.qobi
244
02:23.44
5.Rickieman86
21
02:31.71
6.adminusff 02:41.83
7.gazil 03:33.86
8.mkmk
93
03:44.06
9.Reticle
138
03:44.52
10.AlexanderIII 03:56.68
11.JustGeee 04:08.52
12.insanebrain 04:24.77
13.shoner
7
04:26.76
14.Rocketdog
47
04:43.01
15.takaz 04:50.31
16.Partimento
67
05:29.52
17.Joyous1 05:48.58
18.daspore 05:53.77
19.jeffreym99 05:57.74
20.Alextaz
22
06:25.67
This Week
1.numbrr
329
00:52.11
2.adminusff 02:41.83
3.PlaidChocobo 02:51.00
4.Rickieman86
21
02:51.04
5.mkmk
93
03:44.06
6.JustGeee 04:08.52
7.insanebrain 04:24.77
8.shoner
7
04:32.34
9.takaz 04:50.31
10.qobi
244
05:00.09
11.AlexanderIII 05:10.54
12.Joyous1 05:59.87
13.Uthor 24d 20:31:23.64
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Today
1.AlexanderIII 05:16.15
2.Joyous1 06:14.55
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4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
9.--- empty -----:--
10.--- empty -----:--
11.--- empty -----:--
12.--- empty -----:--
13.--- empty -----:--
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20.--- empty -----:--
MO3
1.PuzzleMaestro
109
01:14.11
2.numbrr
329
01:15.29
3.daanbe
244
01:30.65
4.Silkid
49
01:47.79
5.Reenolex
48
01:50.57
6.Make
288
01:55.81
7.kennethaw88
166
02:05.21
8.nosleeplong
147
02:06.34
9.Meerkat
222
02:17.46
10.Reglect
211
02:23.43
AO5
1.PuzzleMaestro
109
01:18.55
2.numbrr
329
01:28.48
3.daanbe
244
01:39.69
4.Silkid
49
01:50.12
5.Reenolex
48
01:52.77
6.Make
288
02:09.62
7.kennethaw88
166
02:09.93
8.Meerkat
222
02:16.31
9.nosleeplong
147
02:20.69
10.Fastfaxer
132
02:27.15
AO12
1.PuzzleMaestro
109
01:30.78
2.numbrr
329
01:45.47
3.daanbe
244
01:47.02
4.Reenolex
48
02:08.40
5.Silkid
49
02:10.99
6.nosleeplong
147
02:29.19
7.Make
288
02:35.50
8.Reglect
211
02:48.77
9.SilverHawk
216
02:55.59
10.Meerkat
222
02:57.52
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.AutumnWind75
1
00:00.573
3.Paul Bismuth
1
00:03.158

* 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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