Hitori


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Hitori is a logic puzzle with simple rules and challenging solutions.

The rules of Hitori are simple:
You have to shade some of the cells of the grid according to the rules:
- No number should appear unshaded more than once in a row or a column.
- 2 black cells cannot be adjacent horizontally or vertically.
- All non-shaded cells should be connected in a single group by vertical or horizontal motion.

Video Tutorial
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Hitori


5x5 Easy Hitori | 5x5 Normal Hitori | 5x5 Hard Hitori | 10x10 Easy Hitori | 10x10 Normal Hitori | 10x10 Hard Hitori | 15x15 Easy Hitori | 15x15 Normal Hitori | 15x15 Hard Hitori | 20x20 Easy Hitori | 20x20 Normal Hitori | 20x20 Hard Hitori

New Puzzle
This Month
1. yebbo 00:36.22
2. MushroomsCavern
84
 00:36.70
3. spen sp2
43
 00:45.81
4. llmt9
94
 00:50.97
5. tworivers
40
 00:51.13
6. CroMa
93
 00:51.17
7. Iceberg9 00:59.02
8. nastya 01:08.50
9. Harry_Canyon
142
 01:29.87
10. Availle 01:34.78
11. mamawilma
91
 01:49.31
12. leo1999
23
 01:51.23
13. Fynnster48 01:51.71
14. Reticle
131
 01:52.59
15. Nieznany 01:53.25
16. StangBecak 01:58.22
17. Yunteacher
34
 01:58.62
18. GoldChoco36
156
 02:04.95
19. ava1
1
 02:04.99
20. firosibe
23
 02:07.59
This Week
1. MushroomsCavern
84
 00:36.70
2. llmt9
94
 00:50.97
3. CroMa
93
 00:51.17
4. nastya 01:08.50
5. Harry_Canyon
142
 01:29.87
6. mamawilma
91
 01:49.31
7. leo1999
23
 01:51.23
8. Reticle
131
 01:52.59
9. Nieznany 01:53.25
10. floomsi
17
 02:17.91
11. leianimelover
4
 02:18.27
12. daisyisaflower
1
 02:22.20
13. eliii 02:22.73
14. Jorjess
30
 02:24.65
15. Cricketwithagun
27
 03:14.16
16. mielan1 04:32.23
17. demitrio
11
 06:18.21
18.--- empty -----:--
19.--- empty -----:--
20.--- empty -----:--
Today
1. CroMa
93
 00:51.17
2. Reticle
131
 01:52.59
3. leo1999
23
 01:53.92
4. mamawilma
91
 01:57.38
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. Douglas Shamlin Jr.
720
 00:14.28
2. nabi
92
 00:15.73
3. numbrr
319
 00:18.32
4. BingBongBob
108
 00:19.82
5. vowels
216
 00:21.83
6. Joshua Zhang [Studen...
8
 00:22.57
7. Make
281
 00:23.69
8. jai22933
23
 00:24.54
9. daanbe
236
 00:25.00
10. thall
62
 00:25.10
AO5
1. Douglas Shamlin Jr.
720
 00:14.96
2. nabi
92
 00:16.49
3. numbrr
319
 00:19.21
4. BingBongBob
108
 00:19.98
5. vowels
216
 00:22.17
6. Joshua Zhang [Studen...
8
 00:23.06
7. Make
281
 00:24.78
8. jai22933
23
 00:25.09
9. qqwref
266
 00:26.34
10. thall
62
 00:26.44
AO12
1. Douglas Shamlin Jr.
720
 00:16.47
2. nabi
92
 00:19.36
3. numbrr
319
 00:20.92
4. BingBongBob
108
 00:21.05
5. vowels
216
 00:24.20
6. Make
281
 00:25.53
7. jai22933
23
 00:26.96
8. qqwref
266
 00:27.68
9. thall
62
 00:28.83
10. Joshua Zhang [Studen...
8
 00:28.84
Robots / programmatic solversinfo  
1.tlstyer
148
00:00.007
2.jllachan00:00.483
3.BertinSylux98
34
00:00.835

* 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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