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
42
01:20.12
2. Silkid
42
01:47.94
3. Rickieman86 02:27.45
4. MrNyooooom
31
02:34.64
5. takaz 02:41.95
6. qobi
241
02:48.20
7. PlaidChocobo 03:03.72
8. Rocketdog
40
03:04.18
9. AlexanderIII 03:05.03
10. Smylic
149
03:13.83
11. missPear
93
03:14.88
12. L1dji
25
03:39.30
13. Candyman 03:43.16
14. vedpaliwal
62
03:43.29
15. shoner
7
03:44.96
16. cyrus#9023
20
04:03.12
17. JustGeee 04:20.88
18. mkmk
91
04:24.00
19. russellan
71
04:50.78
20. Akuma LI
77
05:01.83
This Week
1. qobi
241
02:57.23
2. Rocketdog
40
03:04.18
3. MrNyooooom
31
03:36.86
4. shoner
7
03:46.75
5. Rickieman86 04:07.95
6. JustGeee 04:24.70
7. AlexanderIII 04:57.70
8. yorcho
89
06:06.43
9. L1dji
25
06:54.82
10. jeffreym99 07:16.48
11. sandrovka
30
09:23.43
12. sigmaSYSU
11
09:50.44
13. Opie1234 15:31.45
14. Martin112358
11
18:05.17
15. ineauno
13
16d 05:10:39.71
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. AlexanderIII 09:10.42
2.--- empty -----:--
3.--- empty -----:--
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
101
01:14.11
2.anonymous
322
01:28.75
3. daanbe
240
01:30.65
4. Silkid
42
01:47.79
5. Reenolex
42
01:50.57
6. Make
288
01:55.81
7. kennethaw88
160
02:05.21
8. Meerkat
214
02:17.46
9. Annyamanee
85
02:23.83
10. Oryn
188
02:24.23
AO5
1. PuzzleMaestro
101
01:18.55
2.anonymous
322
01:39.40
3. daanbe
240
01:39.69
4. Silkid
42
01:50.12
5. Reenolex
42
01:52.77
6. Make
288
02:09.62
7. kennethaw88
160
02:09.93
8. Meerkat
214
02:16.31
9. Fastfaxer
132
02:27.15
10. Annyamanee
85
02:34.84
AO12
1. daanbe
240
01:47.02
2. PuzzleMaestro
101
01:48.80
3. Reenolex
42
02:08.40
4. Silkid
42
02:10.99
5.anonymous
322
02:21.60
6. Make
288
02:35.50
7. SilverHawk
216
02:55.59
8. Meerkat
214
02:57.52
9.anonymous
155
02:58.57
10. hkjsf
161
02:58.83
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.Paul Bismuth
1
00:03.158
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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