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. splinkk
12
00:03.31
2. Reenolex
42
00:03.87
3. Efret
16
00:04.05
4. Rickieman86 00:04.08
5. RelaxedCockatoo
67
00:04.14
6. russellan
71
00:04.73
7. missPear
93
00:04.87
8. Hwellyn
75
00:04.89
9. shoner
7
00:04.97
10. takaz 00:05.03
11. MrNyooooom
31
00:05.15
12. L1dji
25
00:05.25
13. qobi
241
00:05.41
14. wosile
63
00:05.43
15. Jazka 00:05.67
16. Dichterling
7
00:05.81
17. alexlex
89
00:06.20
18. Lynn Bendixsen
152
00:06.57
19. NickB15 00:06.84
20. mfcs3
43
00:06.87
This Week
1. shoner
7
00:04.97
2. L1dji
25
00:05.25
3. Lynn Bendixsen
152
00:06.57
4. mfcs3
43
00:06.87
5. Rickieman86 00:07.47
6. unko
17
00:07.51
7. KETJAK
42
00:08.26
8. qobi
241
00:08.76
9. Efret
16
00:08.90
10. sigmaSYSU
11
00:09.46
11. BlueOcarina
92
00:10.16
12. _AJ_
15
00:10.25
13. FangTianyi 00:10.61
14. Dichterling
7
00:11.62
15. UwUwhaduido
22
00:12.90
16. waggonra 00:13.29
17. ineauno
13
00:13.75
18. IanTheG
19
00:13.91
19. weiyeEke 00:14.63
20. Rushri 00:14.96
Today
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MO3
1. jaybrainer
277
00:02.32
2. hhhhhh2
156
00:02.93
3.anonymous
322
00:03.27
4. daanbe
240
00:03.40
5. PuzzleMaestro
101
00:03.57
6. boru
132
00:03.76
7. hkjsf
161
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
214
00:04.22
10. selahsea
131
00:04.26
AO5
1. jaybrainer
277
00:02.93
2. hhhhhh2
156
00:03.56
3. daanbe
240
00:03.62
4. PuzzleMaestro
101
00:03.76
5.anonymous
322
00:03.97
6. splinkk
12
00:03.99
7. boru
132
00:04.14
8. hkjsf
161
00:04.45
9. Make
288
00:04.46
10. 2015YINJ02
187
00:04.53
AO12
1. jaybrainer
277
00:03.71
2. daanbe
240
00:03.93
3. hhhhhh2
156
00:04.51
4.anonymous
322
00:04.66
5. PuzzleMaestro
101
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
161
00:05.60
8. 2015YINJ02
187
00:05.70
9. boru
132
00:05.71
10. Make
288
00:06.11
Robots / programmatic solversinfo  
1.siebi
1
00:00.152
2.Paul Bismuth
1
00:00.774
3.shumiao5
1
00:04.861

* 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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