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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 №300201

Hitori №300201

  • 4.67
  • Size: 22x22
  • Black Cells: 72
  • Difficulty: 2 46%
  • 2021-08-03 17:32
  • Times solved: 20
  • x2
  • Speed: 04:51
Hitori №283566

Hitori №283566

  • 4.64
  • Size: 19x19
  • Black Cells: 59
  • Difficulty: 2 42%
  • 2021-06-26 09:07
  • Times solved: 22
  • x2
  • Speed: 03:11
Hitori №271296

Hitori №271296

  • 4.62
  • Size: 23x23
  • Black Cells: 68
  • Difficulty: 3 58%
  • 2021-06-30 18:07
  • Times solved: 15
  • x3
  • 3%
  • Speed: 04:40
Hitori №291428

Hitori №291428

  • 4.61
  • Size: 23x23
  • Black Cells: 75
  • Difficulty: 2 47%
  • 2021-08-04 22:08
  • Times solved: 19
  • x3
  • Speed: 05:01
Hitori №304469

Hitori №304469

  • 4.6
  • Size: 14x14
  • Black Cells: 36
  • Difficulty: 2 38%
  • 2021-10-02 18:00
  • Times solved: 15
  • x1
  • Speed: 01:13
Hitori №290474

Hitori №290474

  • 4.6
  • Size: 19x19
  • Black Cells: 59
  • Difficulty: 2 51%
  • 2021-08-23 11:19
  • Times solved: 20
  • x2
  • Speed: 03:22
Hitori №296877

Hitori №296877

  • 4.6
  • Size: 25x25
  • Black Cells: 92
  • Difficulty: 3 76%
  • 2021-09-10 12:00
  • Times solved: 15
  • x3
  • Speed: 10:24
Hitori №301007

Hitori №301007

  • 4.6
  • Size: 15x15
  • Black Cells: 35
  • Difficulty: 1 31%
  • 2021-09-01 17:35
  • Times solved: 17
  • x1
  • Speed: 01:27
Hitori №283641

Hitori №283641

  • 4.6
  • Size: 23x23
  • Black Cells: 74
  • Difficulty: 3 76%
  • 2021-06-29 14:07
  • Times solved: 15
  • x3
  • Speed: 07:51
Hitori №318493

Hitori №318493

  • 4.59
  • Size: 25x25
  • Black Cells: 94
  • Difficulty: 3 58%
  • 2021-11-19 12:00
  • Times solved: 8
  • x3
  • Speed: 06:06
Hitori №285736

Hitori №285736

  • 4.59
  • Size: 25x25
  • Black Cells: 93
  • Difficulty: 2 54%
  • 2021-07-14 17:37
  • Times solved: 17
  • x3
  • Speed: 07:16
Hitori №279817

Hitori №279817

  • 4.58
  • Size: 21x21
  • Black Cells: 58
  • Difficulty: 2 44%
  • 2021-07-01 19:07
  • Times solved: 18
  • x2
  • Speed: 03:58
Hitori №285467

Hitori №285467

  • 4.58
  • Size: 20x20
  • Black Cells: 58
  • Difficulty: 2 49%
  • 2021-07-09 04:07
  • Times solved: 15
  • x2
  • Speed: 03:36
Hitori №281377

Hitori №281377

  • 4.58
  • Size: 13x13
  • Black Cells: 39
  • Difficulty: 2 35%
  • 2021-06-30 07:07
  • Times solved: 14
  • x1
  • Speed: 01:25
Hitori №262885

Hitori №262885

  • 4.58
  • Size: 22x22
  • Black Cells: 74
  • Difficulty: 3 58%
  • 2021-06-17 03:07
  • Times solved: 15
  • x2
  • Speed: 06:09
Hitori №298807

Hitori №298807

  • 4.57
  • Size: 15x15
  • Black Cells: 39
  • Difficulty: 2 39%
  • 2021-10-12 12:00
  • Times solved: 11
  • x1
  • Speed: 01:39
Hitori №282285

Hitori №282285

  • 4.56
  • Size: 23x23
  • Black Cells: 76
  • Difficulty: 3 74%
  • 2021-06-11 20:37
  • Times solved: 15
  • x3
  • Speed: 07:21
Hitori №288022

Hitori №288022

  • 4.54
  • Size: 24x24
  • Black Cells: 77
  • Difficulty: 3 58%
  • 2021-07-15 23:07
  • Times solved: 16
  • x3
  • Speed: 04:40
Hitori №296481

Hitori №296481

  • 4.54
  • Size: 11x11
  • Black Cells: 29
  • Difficulty: 1 31%
  • 2021-11-20 18:00
  • Times solved: 15
  • x1
  • Speed: 00:59
Hitori №284453

Hitori №284453

  • 4.54
  • Size: 17x17
  • Black Cells: 47
  • Difficulty: 2 36%
  • 2021-06-28 00:07
  • Times solved: 18
  • x2
  • Speed: 02:23
Hitori №278854

Hitori №278854

  • 4.53
  • Size: 25x25
  • Black Cells: 95
  • Difficulty: 3 58%
  • 2021-06-09 14:37
  • Times solved: 16
  • x3
  • Speed: 09:59
Hitori №286352

Hitori №286352

  • 4.53
  • Size: 21x21
  • Black Cells: 65
  • Difficulty: 3 58%
  • 2021-06-26 12:07
  • Times solved: 13
  • x2
  • Speed: 03:09
Hitori №275662

Hitori №275662

  • 4.53
  • Size: 8x8
  • Black Cells: 18
  • Difficulty: 2 34%
  • 2021-10-30 12:00
  • Times solved: 17
  • x1
  • Speed: 00:33
Hitori №265979

Hitori №265979

  • 4.53
  • Size: 11x11
  • Black Cells: 28
  • Difficulty: 1 32%
  • 2021-06-29 15:07
  • Times solved: 25
  • x1
  • Speed: 01:02
Hitori №290078

Hitori №290078

  • 4.52
  • Size: 10x10
  • Black Cells: 26
  • Difficulty: 1 25%
  • 2021-07-03 09:07
  • Times solved: 16
  • x1
  • Speed: 00:57
Hitori №292651

Hitori №292651

  • 4.52
  • Size: 22x22
  • Black Cells: 72
  • Difficulty: 3 63%
  • 2021-07-11 10:07
  • Times solved: 15
  • x2
  • Speed: 04:29
Hitori №301207

Hitori №301207

  • 4.52
  • Size: 20x20
  • Black Cells: 55
  • Difficulty: 2 45%
  • 2021-09-13 19:35
  • Times solved: 14
  • x2
  • Speed: 02:56
Hitori №285349

Hitori №285349

  • 4.52
  • Size: 20x20
  • Black Cells: 55
  • Difficulty: 2 46%
  • 2021-07-07 02:07
  • Times solved: 15
  • x2
  • Speed: 03:25
Hitori №303796

Hitori №303796

  • 4.52
  • Size: 19x19
  • Black Cells: 49
  • Difficulty: 1 29%
  • 2021-10-14 12:00
  • Times solved: 13
  • x2
  • Speed: 04:23
Hitori №269005

Hitori №269005

  • 4.52
  • Size: 8x8
  • Black Cells: 18
  • Difficulty: 2 33%
  • 2021-06-28 18:37
  • Times solved: 16
  • x1
  • Speed: 00:30

Missions

Mission "Sapphire Hitori"

2019-05-24   Bruno   Stages65
T25 B2 S2 G16

Mission "Hitori - the Twelve chairs"

2019-04-09   Lysva   Stages10
T24 B3 S7 G23

Mission "Hitori Water"

2019-05-21   Bruno   Stages69
T16 B3 S6 G17
:)
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