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
00:01.99
2. splinkk
12
00:02.36
3. Hwellyn
75
00:03.96
4. OnTheScoreboard 00:04.55
5. qobi
237
00:04.66
6. BillysName 00:04.74
7. MushroomsCavern
90
00:05.11
8. raelkid
105
00:05.37
9. wendua 00:05.58
10. EricLuo123
13
00:05.59
11. Hammernose
16
00:05.62
12. kornelbut
45
00:05.69
13. Adorae
87
00:05.85
13. Kutner17
156
00:05.85
15. citcitcitron
4
00:06.16
16. LoonyGoober 00:06.26
17. May John
99
00:06.41
18. Piotr86a 00:06.53
19. Eskimosnake
113
00:06.69
20. AABBCC112233 00:06.82
This Week
1. splinkk
12
00:02.71
2. qobi
237
00:04.66
3. EricLuo123
13
00:05.59
4. Kutner17
156
00:05.85
5. citcitcitron
4
00:06.16
6. LoonyGoober 00:06.26
7. May John
99
00:06.41
8. AABBCC112233 00:06.82
9. shei
62
00:07.03
10. Efret
11
00:08.65
11. daghan
34
00:09.15
12. Hugo
6
00:10.56
13. Candyman 00:10.76
14. xc0xupx
47
00:11.08
15. Rorschach
14
00:12.27
16. JustGeee 00:12.90
17. Grymhar 00:13.29
18. Izumi2
7
00:13.59
19. Uthor 00:13.97
20. MishaVargas
1
00:14.32
Today
1. EricLuo123
13
00:05.59
2. May John
99
00:06.41
3. AABBCC112233 00:06.82
4. shei
62
00:07.03
5. Candyman 00:10.76
6. eloiiiiise
41
00:15.51
7. Opie1234 00:18.01
8. somako 00:22.41
9. Rickieman86 00:29.38
10. Rushri 00:40.39
11. 1XMvv 02:08.74
12.--- empty -----:--
13.--- empty -----:--
14.--- empty -----:--
15.--- empty -----:--
16.--- empty -----:--
17.--- empty -----:--
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
MO3
1. jaybrainer
266
00:02.32
2. hhhhhh2
150
00:02.93
3. numbrr
321
00:03.27
4. daanbe
236
00:03.40
5. PuzzleMaestro
93
00:03.57
6. boru
129
00:03.76
7. hkjsf
160
00:03.79
8. splinkk
12
00:04.05
9. Meerkat
214
00:04.22
10. haramey
238
00:04.29
AO5
1. jaybrainer
266
00:02.93
2. hhhhhh2
150
00:03.56
3. daanbe
236
00:03.62
4. PuzzleMaestro
93
00:03.76
5. numbrr
321
00:03.97
6. splinkk
12
00:03.99
7. boru
129
00:04.14
8. hkjsf
160
00:04.45
9. Make
282
00:04.46
10. Truth-or-Peace
136
00:04.62
AO12
1. jaybrainer
266
00:03.71
2. daanbe
236
00:03.93
3. hhhhhh2
150
00:04.51
4. numbrr
321
00:04.66
5. PuzzleMaestro
93
00:04.90
6. Meerkat
214
00:05.36
7. hkjsf
160
00:05.60
8. boru
129
00:05.71
9. Make
282
00:06.11
10. Ailurus
186
00:06.39
Robots / programmatic solversinfo  
1.Paul Bismuth
1
00:00.774
2.shumiao5
1
00:04.861
3.DayliteKaty00:10.556

* 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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