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.thall
67
 00:25.26
2.llmt9
104
 00:26.00
3.Dorice
276
 00:35.21
4.Kukko
190
 00:36.57
5.spen sp2
71
 00:38.40
6.Kaci
12
 00:58.86
7.Puninos
81
 01:05.26
8.oversizedpixie
138
 01:09.43
9.floomsi
20
 01:16.67
10.p3nth3s1le4 01:27.90
11.mts55
52
 01:36.04
12.Ernie A.
115
 01:41.56
13.florisdeporis
25
 01:42.59
14.Matthew Zimmer
48
 02:09.46
15.FastFreddy
34
 02:11.60
16.Szysiu123
20
 02:11.93
17.pokosuk
42
 03:57.24
18.NoriFoggy 04:06.33
19.Antwan Rice-McKinley
9
 04:14.80
20.Jippiee 04:52.29
This Week
1.Dorice
276
 00:36.98
2.spen sp2
71
 00:41.86
3.oversizedpixie
138
 01:09.43
4.floomsi
20
 01:16.67
5.Puninos
81
 01:18.69
6.Ernie A.
115
 01:41.56
7.florisdeporis
25
 01:42.59
8.Matthew Zimmer
48
 02:09.46
9.pokosuk
42
 03:57.24
10.Antwan Rice-McKinley
9
 04:14.80
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Today
1.floomsi
20
 01:16.67
2.Ernie A.
115
 01:41.56
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MO3
1.Douglas Shamlin Jr.
724
 00:14.28
2.nabi
92
 00:15.73
3.numbrr
329
 00:18.32
4.BingBongBob
108
 00:19.82
5.vowels
216
 00:21.83
6.thall
67
 00:22.47
7.Joshua Zhang [Student]
8
 00:22.57
8.Make
288
 00:23.69
9.jai22933
23
 00:24.54
10.daanbe
243
 00:25.00
AO5
1.Douglas Shamlin Jr.
724
 00:14.96
2.nabi
92
 00:16.49
3.numbrr
329
 00:19.21
4.BingBongBob
108
 00:19.98
5.vowels
216
 00:22.17
6.thall
67
 00:22.65
7.Joshua Zhang [Student]
8
 00:23.06
8.Make
288
 00:24.78
9.jai22933
23
 00:25.09
10.qqwref
266
 00:26.34
AO12
1.Douglas Shamlin Jr.
724
 00:16.47
2.nabi
92
 00:19.36
3.numbrr
329
 00:20.92
4.BingBongBob
108
 00:21.05
5.vowels
216
 00:24.20
6.thall
67
 00:25.02
7.Make
288
 00:25.53
8.jai22933
23
 00:26.96
9.qqwref
266
 00:27.68
10.Joshua Zhang [Student]
8
 00:28.84
Robots / programmatic solversinfo  
1.dbut2
54
00:00.003
2.tlstyer
158
00:00.007
3.jllachan00:00.483

* 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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