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. Silkid
41
00:09.59
2. MushroomsCavern
123
00:12.95
3. qobi
240
00:13.25
4. MrNyooooom
30
00:13.85
5. Rickieman86 00:15.12
6. mbart
76
00:15.60
7. Opie1234 00:18.40
8. russellan
71
00:20.09
9. Reenolex
40
00:20.84
10. missPear
93
00:21.53
11. Dichterling
7
00:22.09
12. Smylic
149
00:24.82
13. jacobajay77 00:27.35
13. BlueOcarina
91
00:27.35
15. wojtekg 00:28.60
16. ACCVSATOR
28
00:31.95
17. モグモグ
62
00:33.23
18. laries
49
00:33.90
19. Odenzon
45
00:34.45
20. NaluXV1 00:35.23
This Week
1. qobi
240
00:13.25
2. mbart
76
00:15.60
3. Opie1234 00:25.13
4. Dichterling
7
00:25.30
5. wojtekg 00:28.99
6. laries
49
00:33.90
7. BlueOcarina
91
00:39.83
8. takaz 00:49.61
9. DanijelDado
7
00:51.51
10. IanTheG
17
01:28.30
11. AlexanderIII 02:05.96
12. PieMK
8
02:09.83
13. Martin112358
10
03:43.31
14. Uthor 3d 02:36:49.74
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Today
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MO3
1. PuzzleMaestro
100
00:08.67
2. daanbe
239
00:09.57
3. numbrr
322
00:09.88
4. hhhhhh2
156
00:10.65
5. Oryn
186
00:11.22
6. Make
287
00:11.34
7. Meerkat
214
00:11.56
8. 2015YINJ02
187
00:11.59
9. jaybrainer
276
00:12.05
10. Puzzleist
115
00:13.05
AO5
1. daanbe
239
00:09.76
2. PuzzleMaestro
100
00:09.87
3. numbrr
322
00:11.68
4. Make
287
00:11.87
5. Oryn
186
00:12.02
6. 2015YINJ02
187
00:12.47
7. hhhhhh2
156
00:12.68
8. jaybrainer
276
00:13.81
9. Meerkat
214
00:14.05
10. Fastfaxer
132
00:14.16
AO12
1. daanbe
239
00:12.13
2. PuzzleMaestro
100
00:12.45
3. numbrr
322
00:14.94
4. Make
287
00:15.29
5. 2015YINJ02
187
00:15.94
6. jaybrainer
276
00:16.64
7. hkjsf
161
00:16.91
8. Oryn
186
00:16.97
9. MoFan
120
00:17.56
10. Meerkat
214
00:17.59
Robots / programmatic solversinfo  
1.siebi
1
00:00.157
2.Paul Bismuth
1
00:01.055
3.Elizabeth Tang
1
03:04.647

* 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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