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. numbrr
321
00:18.11
2. gazil 00:30.89
3. SilverHawk
216
00:33.45
4. MushroomsCavern
90
00:36.81
5. Alexia :)
128
00:38.69
6. crema
271
00:40.55
7. Nieznany 00:44.91
8. nerdvert
101
00:46.58
9. Dorice
269
00:49.16
10. qobi
237
00:54.73
11. afidaleo
133
00:56.17
12. Rorschach
14
00:56.57
13. PlaidChocobo 00:57.23
14. Pigeon22 00:57.80
15. CapitanCaguama 01:05.13
16. Aidans3322 01:11.36
17. Emfine
57
01:15.10
18. daghan
34
01:16.10
19. Rickieman86 01:16.49
20. agrayperspectiv 01:16.56
This Week
1. numbrr
321
00:18.11
2. SilverHawk
216
00:33.45
3. Nieznany 00:44.91
4. Dorice
269
00:49.16
5. qobi
237
00:57.87
6. Rorschach
14
01:08.17
7. Pigeon22 01:10.07
8. Aidans3322 01:11.36
9. Emfine
57
01:15.10
10. daghan
34
01:16.10
11. Rickieman86 01:16.49
12. nerdvert
101
01:17.91
13. Reenolex
4
01:20.81
14. JustGeee 01:21.00
15. cyrus#9023
20
01:28.53
16. Odenzon
33
01:40.83
17. Piotr86a 02:09.24
18. spiccy
45
02:11.65
19. CroMa
94
02:13.32
20. May John
99
02:36.62
Today
1. Dorice
269
00:49.16
2. Pigeon22 01:13.20
3. Nieznany 01:19.49
4. daghan
34
01:22.24
5. cyrus#9023
20
01:28.53
6. JustGeee 01:38.23
7. Odenzon
33
01:40.83
8. Rickieman86 01:46.51
9. Rorschach
14
01:52.54
10. CroMa
94
02:13.32
11. May John
99
02:36.62
12. shei
62
04:13.92
13. Rushri 06:20.15
14. IRizz
8
08:59.84
15. Efran
50
17:39.41
16. zhugezy
17
18:06.68
17. 1XMvv 26:35.54
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. PuzzleMaestro
93
00:24.78
2. daanbe
236
00:26.57
3. Fastfaxer
131
00:28.90
4. numbrr
321
00:30.33
5. Make
282
00:32.40
6. Meerkat
214
00:37.39
7.anonymous
37
00:41.66
8. kennethaw88
157
00:41.81
9. Truth-or-Peace
136
00:42.44
10. hkjsf
160
00:43.36
AO5
1. PuzzleMaestro
93
00:25.67
2. daanbe
236
00:30.55
3. numbrr
321
00:31.29
4. Make
282
00:34.73
5. Fastfaxer
131
00:35.99
6. Meerkat
214
00:44.16
7. kennethaw88
157
00:46.00
8. qqwref
266
00:48.31
9. hkjsf
160
00:49.40
10.anonymous
37
00:49.91
AO12
1. PuzzleMaestro
93
00:31.59
2. numbrr
321
00:35.75
3. daanbe
236
00:37.03
4. Make
282
00:45.20
5. Fastfaxer
131
00:50.57
6. Meerkat
214
00:55.16
7. Oryn
178
00:57.76
8. qqwref
266
00:59.69
9. hkjsf
160
00:59.79
9. Rhododendron
154
00:59.79
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:01.604
2.gazil900:53.440
3.qzdlogic03:26.545

* 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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