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
36
01:20.12
2. takaz 02:41.95
3. qobi
240
02:53.42
4. PlaidChocobo 02:54.79
5. Rickieman86 02:59.52
6. Smylic
148
03:13.83
7. missPear
93
03:14.88
8. Rocketdog
39
03:37.38
9. mirovic 03:50.63
10. shoner
7
04:07.16
11. sandrovka
25
04:20.54
12. mkmk
91
04:24.00
13. JustGeee 04:29.51
14. AlexanderIII 04:41.20
15. russellan
71
04:50.78
16. Candyman 05:10.63
17. vedpaliwal
61
05:14.59
18. Dorice
271
05:43.56
19. BlueBumblebee
26
05:56.75
20. モグモグ
62
05:57.88
This Week
1. takaz 02:41.95
2. Rickieman86 02:59.52
3. PlaidChocobo 03:05.04
4. Smylic
148
03:13.83
5. missPear
93
03:20.42
6. shoner
7
04:07.16
7. JustGeee 04:29.51
8. AlexanderIII 05:08.79
9. Candyman 05:10.63
10. qobi
240
05:22.27
11. jeffreym99 09:45.86
12. _AJ_
13
11:53.87
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Today
1. AlexanderIII 07:58.69
2. jeffreym99 10:03.50
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4.--- empty -----:--
5.--- empty -----:--
6.--- empty -----:--
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8.--- empty -----:--
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MO3
1. PuzzleMaestro
99
01:14.11
2. numbrr
322
01:28.75
3. daanbe
239
01:30.65
4. Reenolex
36
01:50.57
5. Make
286
01:55.81
6. kennethaw88
160
02:05.21
7. Meerkat
214
02:17.46
8. Annyamanee
84
02:23.83
9. Oryn
185
02:24.23
10. SilverHawk
216
02:26.16
AO5
1. PuzzleMaestro
99
01:18.55
2. numbrr
322
01:39.40
3. daanbe
239
01:39.69
4. Reenolex
36
01:52.77
5. Make
286
02:09.62
6. kennethaw88
160
02:09.93
7. Meerkat
214
02:16.31
8. Fastfaxer
132
02:27.15
9. Annyamanee
84
02:34.84
10. cal
77
02:36.15
AO12
1. daanbe
239
01:47.02
2. PuzzleMaestro
99
01:48.80
3. Reenolex
36
02:08.40
4. numbrr
322
02:21.60
5. Make
286
02:35.50
6. SilverHawk
216
02:55.59
7. Meerkat
214
02:57.52
8.anonymous
154
02:58.57
9. hkjsf
161
02:58.83
10. kennethaw88
160
03:01.70
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.Paul Bismuth
1
00:03.158
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* 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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