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.Oryn
200
00:01.93
2.homeplus
64
00:02.14
3.MushroomsCavern
141
00:02.63
4.Silkid
49
00:02.75
5.adminusff 00:03.57
6.RelaxedCockatoo
67
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119
00:03.82
8.nosleeplong
147
00:04.15
9.kennethaw88
166
00:04.69
10.cloudspan
11
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244
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14.Virku 00:06.39
15.sandrovka
41
00:06.61
15.Ledorian01
34
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17.Partimento
67
00:06.95
18.insanebrain 00:06.98
19.KingKahuka 00:07.12
20.shoner
7
00:07.30
This Week
1.adminusff 00:03.57
2.RelaxedCockatoo
67
00:03.82
3.NyoomCat 00:06.06
4.Partimento
67
00:06.95
5.grimmgirlfandom
176
00:07.95
6.xiongan 00:08.19
7.TwilightHalo
5
00:08.73
8.Opie1234 00:08.76
9.Kannhd 00:08.96
10.BlueOcarina
92
00:10.34
11.Rushri 00:10.41
12.insanebrain 00:11.77
13.Virku 00:12.03
14.qobi
244
00:12.48
15.Efran
51
00:13.05
16.SilkyGrove
70
00:22.21
17.stevo 00:29.30
18.weiyeEke 00:40.37
19.dave73000 00:56.18
20.PeterP3
22
01:17.33
Today
1.grimmgirlfandom
176
00:07.95
2.Opie1234 00:08.76
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20.--- empty -----:--
MO3
1.jaybrainer
288
00:02.32
2.numbrr
329
00:02.85
3.hhhhhh2
159
00:02.93
4.daanbe
244
00:03.40
5.PuzzleMaestro
109
00:03.57
6.homeplus
64
00:03.75
7.boru
135
00:03.76
8.hkjsf
162
00:03.79
9.splinkk
12
00:04.05
10.Meerkat
222
00:04.22
AO5
1.jaybrainer
288
00:02.93
2.numbrr
329
00:03.24
3.hhhhhh2
159
00:03.56
4.daanbe
244
00:03.62
5.PuzzleMaestro
109
00:03.76
6.splinkk
12
00:03.99
7.boru
135
00:04.14
8.hkjsf
162
00:04.45
9.Make
288
00:04.46
10.2015YINJ02
187
00:04.53
AO12
1.jaybrainer
288
00:03.71
2.daanbe
244
00:03.93
3.numbrr
329
00:04.30
4.hhhhhh2
159
00:04.51
5.PuzzleMaestro
109
00:04.90
6.homeplus
64
00:05.14
7.Meerkat
222
00:05.36
8.hkjsf
162
00:05.60
9.2015YINJ02
187
00:05.70
10.boru
135
00:05.71
Robots / programmatic solversinfo  
1.siebi
1
00:00.152
2.AutumnWind75
1
00:00.395
3.Paul Bismuth
1
00:00.774

* 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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