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
00:25.54
2. gazil 00:29.85
3. MrNyooooom
31
00:30.65
4. Rickieman86 00:34.08
5. MushroomsCavern
126
00:38.80
6. nerdvert
104
00:39.25
7. Alachas
44
00:45.54
8. Efret
16
00:46.78
9. shoner
7
00:49.27
10. missPear
93
00:51.31
11. Nieznany 00:52.75
12. russellan
71
00:57.47
13. qobi
241
00:59.70
14. Tomas7407
13
01:00.30
15. laries
49
01:09.82
16. JustGeee 01:17.77
17. Lynn Bendixsen
152
01:22.63
18. L1dji
25
01:24.33
19. Dichterling
7
01:25.51
20. Dorice
272
01:28.81
This Week
1. gazil 00:29.85
2. Alachas
44
00:45.54
3. shoner
7
00:49.27
4. nerdvert
104
00:50.56
5. qobi
241
01:03.64
6. Lynn Bendixsen
152
01:22.63
7. Rickieman86 01:23.03
8. laries
49
01:29.08
9. JustGeee 01:29.90
10. Opie1234 01:51.28
11. BlueOcarina
92
01:52.36
12. FunAcroFly
143
02:05.98
13. giacomoperovano
27
02:07.59
14. grimeyatlarge
43
02:08.84
15. jeffreym99 02:20.53
16. Martin112358
11
03:12.99
17. ineauno
13
03:26.03
18. Rushri 04:32.40
19. NUUUTE
39
06:21.54
20. KaWaiWong
5
07:44.49
Today
1. BlueOcarina
92
04:53.49
2. Efran
51
22:44.14
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
00:24.78
2. daanbe
240
00:26.57
3. Fastfaxer
132
00:28.90
4.anonymous
322
00:30.33
5. Make
288
00:32.40
6. Reenolex
42
00:33.44
7. 2015YINJ02
187
00:34.23
8. Meerkat
214
00:37.39
9.anonymous
44
00:41.66
10. kennethaw88
160
00:41.81
AO5
1. PuzzleMaestro
101
00:25.67
2. daanbe
240
00:30.55
3.anonymous
322
00:31.29
4. Make
288
00:34.73
5. Fastfaxer
132
00:35.99
6. Reenolex
42
00:36.62
7. 2015YINJ02
187
00:37.22
8. Meerkat
214
00:44.16
9. SilverHawk
216
00:44.63
10. kennethaw88
160
00:46.00
AO12
1. PuzzleMaestro
101
00:31.59
2.anonymous
322
00:35.75
3. daanbe
240
00:37.03
4. Reenolex
42
00:43.23
5. Make
288
00:45.20
6. Fastfaxer
132
00:50.57
7. Meerkat
214
00:55.16
8. 2015YINJ02
187
00:55.32
9. SilverHawk
216
00:57.24
10. Oryn
188
00:57.76
Robots / programmatic solversinfo  
1.siebi
1
00:00.154
2.Paul Bismuth
1
00:01.604
3.gazil900:53.440

* 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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