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Hitori is a numerical puzzle created in Japan. Hitori is a 3x3 to 25x25 square field with each cell filled with either a number or a letter. No row or column can have more than one occurrence of any given number. The goal is to find the numbers that have been placed incorrectly and mark them black.

The black cells must to touch either horizontally or vertically, but there can be diagonally adjacent black cells. The cells that remain blank have to touch others, as well as any of the surfaces, and create a single area.

A left mouse click can be used to mark cells black. The cells that duplicate and, therefore, were filled incorrectly are highlighted red. The red color for duplicates in a single row is brighter than the one for duplicates in the same column. The right click can also be used to mark the cells that are most likely not to be black. However, this mark is only supplementary and does not affect the solution check.

To check whether Hitori has been solved correctly, please click the corresponding button. Mistakes are marked in red, whereas the pink color shows the isolated areas. The number of black cells must not exceed the one specified in the problem; otherwise, the check button will become inactive.

Suitable for smartphones
Likes 91
Times solved 177
x1
2017-11-22 00:00
00:08
1 12%
4x4
5
Likes 81
Times solved 110
x1
2019-10-17 15:03
00:07
1 18%
4x4
5
Likes 81
Times solved 235
x1
2016-11-09 00:00
00:08
1 17%
3x3
2
Likes 78
Times solved 119
x1
2019-07-14 04:03
00:05
1 15%
4x4
4
Likes 77
Times solved 136
x1
2017-12-07 00:00
00:11
1 11%
4x4
5
Likes 76
Times solved 102
x1
2020-12-01 18:28
00:04
1 16%
4x4
3
Likes 75
Times solved 146
x1
2018-05-20 00:00
00:09
1 13%
4x4
5
Likes 74
Times solved 131
x1
2018-01-02 00:00
00:05
1 13%
4x4
4
Likes 73
Times solved 116
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2018-12-22 08:03
00:06
1 18%
4x4
4
Likes 73
Times solved 104
x1
2020-09-15 18:28
00:04
1 17%
4x4
4
Likes 73
Times solved 195
x1
2016-11-09 00:00
00:10
1 15%
3x3
3
Likes 73
Times solved 130
x1
2018-04-24 00:00
00:08
1 13%
4x4
5
Likes 72
Times solved 108
x1
2019-10-11 04:03
00:07
1 21%
4x4
5
Likes 71
Times solved 101
x1
2020-07-29 09:07
00:05
1 12%
4x4
3
Likes 71
Times solved 105
x1
2019-05-24 06:03
00:05
1 15%
4x4
4
Likes 70
Times solved 108
x1
2019-05-27 10:03
00:12
1 19%
4x4
5
Likes 69
Times solved 103
x1
2019-05-10 00:03
00:05
1 19%
4x4
4
Likes 68
Times solved 172
x1
2017-06-12 00:00
00:14
1 19%
4x4
5
Likes 68
Times solved 109
x1
2018-12-20 06:03
00:05
1 16%
4x4
4
Likes 67
Times solved 109
x1
2019-01-03 04:03
00:08
1 13%
4x4
4
Likes 67
Times solved 86
x1
2021-01-07 19:37
00:06
1 11%
4x4
4
Likes 67
Times solved 113
x1
2018-08-31 00:03
00:07
1 17%
4x4
5
Likes 67
Times solved 112
x1
2018-09-26 08:03
00:09
1 15%
4x4
5
Likes 66
Times solved 121
x1
2017-06-28 00:00
00:05
1 15%
4x4
4
Likes 66
Times solved 109
x1
2019-03-04 10:03
00:06
1 17%
4x4
5
Likes 66
Times solved 133
x1
2016-12-03 00:00
00:15
1 14%
5x5
7
Likes 66
Times solved 108
x1
2018-02-24 00:00
00:05
1 15%
4x4
4
Likes 65
Times solved 127
x1
2017-10-09 00:00
00:09
1 13%
4x4
5
Likes 65
Times solved 111
x1
2018-09-06 06:03
00:05
1 13%
4x4
4
Likes 65
Times solved 93
x1
2019-10-26 04:03
00:05
1 16%
4x4
5
Likes 65
Times solved 103
x1
2018-12-03 04:03
00:05
1 14%
4x4
4
Likes 64
Times solved 135
x1
2017-10-24 00:00
00:07
1 14%
4x4
5
Likes 64
Times solved 95
x1
2019-01-30 10:03
00:06
1 17%
4x4
5
Likes 64
Times solved 103
x1
2019-02-09 00:03
00:05
1 20%
4x4
4
Likes 64
Times solved 96
x1
2020-03-10 18:07
00:06
1 16%
4x4
4
Likes 64
Times solved 96
x1
2018-10-18 10:03
00:04
1 14%
4x4
4

Missions

Mission "Persian Gulf Hitori"

2019-05-22   Bruno   Stages55
T17 B0 S2 G17

Mission "Hitori Water"

2019-05-21   Bruno   Stages69
T16 B3 S7 G19

Mission "Sapphire Hitori"

2019-05-24   Bruno   Stages65
T25 B2 S3 G19
:)
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