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. qobi
241
00:13.25
2. MrNyooooom
31
00:13.85
3. missPear
93
00:14.70
4. mbart
76
00:15.19
5. Rickieman86 00:15.27
6. Opie1234 00:18.40
7. mfcs3
43
00:18.50
8. L1dji
25
00:18.55
9. Efret
16
00:19.01
10. russellan
71
00:20.09
11. Reenolex
42
00:20.84
12. Dichterling
7
00:22.09
13. Lynn Bendixsen
152
00:24.60
14. BlueOcarina
92
00:27.35
15. wojtekg 00:27.58
16. laries
49
00:33.90
17. Odenzon
45
00:34.45
18. NaluXV1 00:35.23
19. p1gw1
18
00:36.29
20. giacomoperovano
27
00:39.71
This Week
1. mbart
76
00:15.19
2. mfcs3
43
00:18.50
3. L1dji
25
00:18.55
4. Opie1234 00:23.94
5. Lynn Bendixsen
152
00:24.60
6. wojtekg 00:27.58
7. qobi
241
00:28.62
8. Rickieman86 00:31.71
9. MrNyooooom
31
00:33.69
10. BlueOcarina
92
00:34.35
11. DanijelDado
9
00:44.51
12. unko
17
00:47.42
13. weiyeEke 00:51.28
14. sigmaSYSU
11
00:55.90
15. kingofnumbers
13
01:24.70
16. Martin112358
11
01:42.11
17. sandrovka
30
02:02.97
18. KaWaiWong
5
04:56.29
19.--- empty -----:--
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Today
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6.--- empty -----:--
7.--- empty -----:--
8.--- empty -----:--
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11.--- empty -----:--
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MO3
1. PuzzleMaestro
101
00:08.67
2. daanbe
240
00:09.57
3.anonymous
322
00:09.88
4. hhhhhh2
156
00:10.65
5. Silkid
42
00:10.82
6. Oryn
188
00:11.22
7. Make
288
00:11.34
8. Meerkat
214
00:11.56
9. 2015YINJ02
187
00:11.59
10. jaybrainer
277
00:12.05
AO5
1. daanbe
240
00:09.76
2. PuzzleMaestro
101
00:09.87
3.anonymous
322
00:11.68
4. Make
288
00:11.87
5. Oryn
188
00:12.02
6. Silkid
42
00:12.09
7. 2015YINJ02
187
00:12.47
8. hhhhhh2
156
00:12.68
9. jaybrainer
277
00:13.81
10. Meerkat
214
00:14.05
AO12
1. daanbe
240
00:12.13
2. PuzzleMaestro
101
00:12.45
3.anonymous
322
00:14.94
4. Make
288
00:15.29
5. Silkid
42
00:15.45
6. 2015YINJ02
187
00:15.94
7. jaybrainer
277
00:16.64
8. hkjsf
161
00:16.91
9. Oryn
188
00:16.97
10. MoFan
120
00:17.56
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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