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. RelaxedCockatoo
67
00:02.85
2. Efret
17
00:04.05
3. kennethaw88
161
00:04.32
4. shoner
7
00:04.79
5. missPear
94
00:04.87
6. Hwellyn
75
00:04.89
7. mfcs3
43
00:04.97
8. takaz 00:05.03
9. L1dji
28
00:05.25
10. NyoomCat 00:05.40
11. qobi
242
00:05.41
12. wosile
68
00:05.43
13. Lynn Bendixsen
153
00:06.09
14. Galaxy21
75
00:06.28
15. Rickieman86 00:06.66
16. cal
78
00:07.40
17. unko
24
00:07.51
18. Dichterling
7
00:07.60
19. KETJAK
43
00:08.26
20. PieMK
9
00:08.89
This Week
1. RelaxedCockatoo
67
00:02.85
2. NyoomCat 00:05.40
3. shoner
7
00:05.89
4. Galaxy21
75
00:06.28
5. qobi
242
00:06.64
6. Rickieman86 00:06.66
7. cal
78
00:07.40
8. Lynn Bendixsen
153
00:08.67
9. Opie1234 00:09.22
10. KiLLsTR3ak47
8
00:09.23
11. Pertyian 00:09.73
11. wendua 00:09.73
13. xilli 00:10.82
14. BlueOcarina
92
00:11.89
15. PaulFrisk 00:14.67
16. Penroze
103
00:18.77
17. Hammernose
20
00:20.37
18. unko
24
00:24.46
19. meaghan_rebecca
27
00:33.28
20.--- empty -----:--
Today
1. Galaxy21
75
00:06.28
2. BlueOcarina
92
00:11.89
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. jaybrainer
278
00:02.32
2. hhhhhh2
156
00:02.93
3. numbrr
323
00:03.27
4. daanbe
240
00:03.40
5. PuzzleMaestro
102
00:03.57
6. boru
133
00:03.76
7. hkjsf
162
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
214
00:04.22
10. selahsea
131
00:04.26
AO5
1. jaybrainer
278
00:02.93
2. hhhhhh2
156
00:03.56
3. daanbe
240
00:03.62
4. PuzzleMaestro
102
00:03.76
5. numbrr
323
00:03.97
6. splinkk
12
00:03.99
7. boru
133
00:04.14
8. hkjsf
162
00:04.45
9. Make
288
00:04.46
10. 2015YINJ02
187
00:04.53
AO12
1. jaybrainer
278
00:03.71
2. daanbe
240
00:03.93
3. hhhhhh2
156
00:04.51
4. numbrr
323
00:04.66
5. PuzzleMaestro
102
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
162
00:05.60
8. 2015YINJ02
187
00:05.70
9. boru
133
00:05.71
10. Make
288
00:06.11
Robots / programmatic solversinfo  
1.siebi
1
00:00.152
2.AutumnWind75
1
00:00.395
3.Paul Bismuth
1
00:00.774

* 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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