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
00:17.30
2. gazil 00:21.22
3. missPear
91
00:38.27
4. kennethaw88
155
00:38.42
5. Dorice
267
00:38.57
6. Alachas
28
00:39.17
7. Nieznany 00:39.49
8. crema
265
00:50.57
9. qobi
235
00:51.73
10. PArzi 00:57.12
11. nerdvert
100
00:57.97
12. Debbie King
38
01:00.95
13. Partimento
58
01:03.36
14. Wuni14 01:08.18
15. oks001 01:08.80
16. grimmgirlfandom
169
01:09.36
17. sutchinger
87
01:11.58
18. CapitanCaguama 01:18.17
19. Alexia :)
124
01:20.02
20. cal
75
01:20.37
This Week
1. Nieznany 00:44.74
2. Alachas
28
00:48.85
3. crema
265
00:50.57
4. qobi
235
00:58.20
5. grimmgirlfandom
169
01:09.36
6. nerdvert
100
01:14.85
7. Alexia :)
124
01:20.02
8. cal
75
01:20.37
9. CapitanCaguama 01:21.90
10. Wuni14 01:25.84
11. JustGeee 01:35.37
12. Dorice
267
01:52.59
13. FlatBottomCloud
106
01:56.19
14. hq4hq
136
01:56.48
15. nulka 02:04.52
16. Einsteinus
118
02:19.52
17. Hammernose
5
02:44.41
18. whx
37
02:48.98
19. Gage Williams
28
03:04.37
20. Fuksja Fuksjowa
43
04:09.51
Today
1. Alachas
28
01:24.49
2. nulka 02:04.52
3. JustGeee 02:26.44
4.--- empty -----:--
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
00:24.78
2. Fastfaxer
131
00:28.90
3. daanbe
231
00:29.27
4. numbrr
314
00:30.33
5. Make
279
00:32.40
6. Meerkat
212
00:37.39
7.anonymous
28
00:41.66
8. kennethaw88
155
00:41.81
9. Truth-or-Peace
134
00:42.44
10. hkjsf
158
00:43.36
AO5
1. PuzzleMaestro
92
00:25.67
2. daanbe
231
00:30.55
3. numbrr
314
00:31.29
4. Make
279
00:34.73
5. Fastfaxer
131
00:35.99
6. Meerkat
212
00:44.16
7. kennethaw88
155
00:46.00
8. qqwref
266
00:48.31
9. hkjsf
158
00:49.40
10.anonymous
28
00:49.91
AO12
1. PuzzleMaestro
92
00:31.59
2. numbrr
314
00:35.75
3. daanbe
231
00:37.03
4. Make
279
00:45.20
5. Fastfaxer
131
00:50.57
6. Meerkat
212
00:55.16
7. qqwref
266
00:59.69
8. hkjsf
158
00:59.79
8. Rhododendron
152
00:59.79
10. kennethaw88
155
00:59.92
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:01.604
2.gazil900:53.440
3.qzdlogic03:26.545

* 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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