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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
Hitori №278663

Hitori №278663

  • 4.69
  • Size: 12x12
  • Black Cells: 30
  • Difficulty: 2 44%
  • 2021-05-24 04:07
  • Times solved: 14
  • x1
  • Speed: 01:32
Hitori №260339

Hitori №260339

  • 4.69
  • Size: 19x19
  • Black Cells: 54
  • Difficulty: 2 45%
  • 2021-06-28 22:37
  • Times solved: 14
  • x2
  • Speed: 02:27
Hitori №290721

Hitori №290721

  • 4.68
  • Size: 14x14
  • Black Cells: 31
  • Difficulty: 2 36%
  • 2021-07-03 02:07
  • Times solved: 19
  • x1
  • Speed: 02:02
Hitori №284202

Hitori №284202

  • 4.67
  • Size: 8x8
  • Black Cells: 18
  • Difficulty: 1 23%
  • 2021-07-10 10:07
  • Times solved: 14
  • x1
  • Speed: 00:33
Hitori №292651

Hitori №292651

  • 4.67
  • Size: 22x22
  • Black Cells: 72
  • Difficulty: 3 70%
  • 2021-07-11 10:07
  • Times solved: 11
  • x2
  • Speed: 04:53
Hitori №288117

Hitori №288117

  • 4.67
  • Size: 10x10
  • Black Cells: 19
  • Difficulty: 2 34%
  • 2021-07-07 05:07
  • Times solved: 13
  • x1
  • Speed: 00:35
Hitori №293853

Hitori №293853

  • 4.67
  • Size: 7x7
  • Black Cells: 13
  • Difficulty: 1 29%
  • 2021-07-13 02:07
  • Times solved: 15
  • x1
  • Speed: 00:45
Hitori №265979

Hitori №265979

  • 4.67
  • Size: 11x11
  • Black Cells: 28
  • Difficulty: 1 29%
  • 2021-06-29 15:07
  • Times solved: 19
  • x1
  • Speed: 01:02
Hitori №283566

Hitori №283566

  • 4.66
  • Size: 19x19
  • Black Cells: 59
  • Difficulty: 2 52%
  • 2021-06-26 09:07
  • Times solved: 13
  • x2
  • Speed: 03:11
Hitori №279817

Hitori №279817

  • 4.65
  • Size: 21x21
  • Black Cells: 58
  • Difficulty: 2 45%
  • 2021-07-01 19:07
  • Times solved: 10
  • x2
  • Speed: 04:20
Hitori №285736

Hitori №285736

  • 4.64
  • Size: 25x25
  • Black Cells: 93
  • Difficulty: 2 53%
  • 2021-07-14 17:37
  • Times solved: 11
  • x3
  • Speed: 07:16
Hitori №285762

Hitori №285762

  • 4.64
  • Size: 7x7
  • Black Cells: 13
  • Difficulty: 1 13%
  • 2021-07-08 15:37
  • Times solved: 16
  • x1
  • Speed: 00:18
Hitori №283262

Hitori №283262

  • 4.64
  • Size: 19x19
  • Black Cells: 42
  • Difficulty: 2 53%
  • 2021-06-17 22:37
  • Times solved: 14
  • x2
  • Speed: 02:55
Hitori №285349

Hitori №285349

  • 4.64
  • Size: 20x20
  • Black Cells: 55
  • Difficulty: 2 47%
  • 2021-07-07 02:07
  • Times solved: 10
  • x2
  • Speed: 03:27
Hitori №279268

Hitori №279268

  • 4.64
  • Size: 8x8
  • Black Cells: 16
  • Difficulty: 1 22%
  • 2021-06-08 17:07
  • Times solved: 11
  • x1
  • Speed: 00:23
Hitori №281377

Hitori №281377

  • 4.63
  • Size: 13x13
  • Black Cells: 39
  • Difficulty: 1 32%
  • 2021-06-30 07:07
  • Times solved: 10
  • x1
  • Speed: 01:25
Hitori №288046

Hitori №288046

  • 4.63
  • Size: 10x10
  • Black Cells: 26
  • Difficulty: 2 37%
  • 2021-06-25 20:37
  • Times solved: 13
  • x1
  • Speed: 01:10
Hitori №285277

Hitori №285277

  • 4.63
  • Size: 23x23
  • Black Cells: 80
  • Difficulty: 3 58%
  • 2021-06-15 03:07
  • Times solved: 10
  • x3
  • Speed: 07:23
Hitori №286620

Hitori №286620

  • 4.62
  • Size: 21x21
  • Black Cells: 64
  • Difficulty: 2 51%
  • 2021-06-19 08:07
  • Times solved: 8
  • x2
  • Speed: 05:42
Hitori №271296

Hitori №271296

  • 4.62
  • Size: 23x23
  • Black Cells: 68
  • Difficulty: 3 58%
  • 2021-06-30 18:07
  • Times solved: 11
  • x3
  • 3%
  • Speed: 04:28
Hitori №280261

Hitori №280261

  • 4.62
  • Size: 25x25
  • Black Cells: 85
  • Difficulty: 3 68%
  • 2021-06-08 03:07
  • Times solved: 7
  • x3
  • Speed: 08:23
Hitori №269005

Hitori №269005

  • 4.62
  • Size: 8x8
  • Black Cells: 18
  • Difficulty: 2 35%
  • 2021-06-28 18:37
  • Times solved: 11
  • x1
  • Speed: 00:32
Hitori №262885

Hitori №262885

  • 4.62
  • Size: 22x22
  • Black Cells: 74
  • Difficulty: 3 66%
  • 2021-06-17 03:07
  • Times solved: 9
  • x2
  • Speed: 07:51
Hitori №274433

Hitori №274433

  • 4.61
  • Size: 19x19
  • Black Cells: 56
  • Difficulty: 3 58%
  • 2021-06-27 03:07
  • Times solved: 9
  • x2
  • Blue Potion 2%
  • Speed: 03:23
Hitori №270655

Hitori №270655

  • 4.61
  • Size: 8x8
  • Black Cells: 16
  • Difficulty: 1 23%
  • 2021-06-29 04:07
  • Times solved: 12
  • x1
  • Speed: 00:22
Hitori №278339

Hitori №278339

  • 4.61
  • Size: 13x13
  • Black Cells: 39
  • Difficulty: 1 29%
  • 2021-06-16 00:07
  • Times solved: 9
  • x1
  • Speed: 01:07
Hitori №288022

Hitori №288022

  • 4.6
  • Size: 24x24
  • Black Cells: 77
  • Difficulty: 3 58%
  • 2021-07-15 23:07
  • Times solved: 12
  • x3
  • Speed: 07:19
Hitori №285467

Hitori №285467

  • 4.6
  • Size: 20x20
  • Black Cells: 58
  • Difficulty: 2 53%
  • 2021-07-09 04:07
  • Times solved: 13
  • x2
  • Speed: 04:56
Hitori №290078

Hitori №290078

  • 4.6
  • Size: 10x10
  • Black Cells: 26
  • Difficulty: 1 24%
  • 2021-07-03 09:07
  • Times solved: 14
  • x1
  • Speed: 00:54
Hitori №279460

Hitori №279460

  • 4.6
  • Size: 11x11
  • Black Cells: 28
  • Difficulty: 2 37%
  • 2021-07-01 15:34
  • Times solved: 12
  • x1
  • Speed: 01:00

Missions

Mission "Tricks Hitori"

2019-04-09   Bruno   Stages10
T11 B1 S5 G38

Mission "Hitori Pure Emerald"

2019-05-21   Bruno   Stages60
T12 B3 S1 G15

Mission "Persian Gulf Hitori"

2019-05-22   Bruno   Stages55
T17 B0 S1 G14
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