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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 №262114

Hitori №262114

  • Size: 25x25
  • Black Cells: 90
  • Rating: 4.74
  • Difficulty: 4 88%
  • 2021-04-13 16:47
  • Times solved: 6
  • x3+ Ore 20%
  • Speed: 21:29
Hitori №260572

Hitori №260572

  • Size: 6x6
  • Black Cells: 10
  • Rating: 4.7
  • Difficulty: 1 18%
  • 2021-04-11 15:07
  • Times solved: 11
  • x1
  • Speed: 00:17
Hitori №212773

Hitori №212773

  • Size: 24x24
  • Black Cells: 84
  • Rating: 4.63
  • Difficulty: 2 47%
  • 2021-04-14 00:47
  • Times solved: 6
  • x3
  • Speed: 05:52
Hitori №223001

Hitori №223001

  • Size: 25x25
  • Black Cells: 99
  • Rating: 4.62
  • Difficulty: 2 50%
  • 2020-12-23 17:37
  • Times solved: 13
  • x3
  • Speed: 08:02
Hitori №261980

Hitori №261980

  • Size: 12x12
  • Black Cells: 33
  • Rating: 4.62
  • Difficulty: 2 35%
  • 2021-04-08 20:37
  • Times solved: 7
  • x1
  • Speed: 01:37
Hitori №255398

Hitori №255398

  • Size: 10x10
  • Black Cells: 23
  • Rating: 4.62
  • Difficulty: 1 21%
  • 2021-03-16 11:37
  • Times solved: 15
  • x1
  • Speed: 00:41
Hitori №229296

Hitori №229296

  • Size: 12x12
  • Black Cells: 28
  • Rating: 4.6
  • Difficulty: 1 25%
  • 2021-03-16 18:09
  • Times solved: 9
  • x1
  • Speed: 00:55
Hitori №237528

Hitori №237528

  • Size: 15x15
  • Black Cells: 35
  • Rating: 4.59
  • Difficulty: 2 51%
  • 2021-02-20 01:07
  • Times solved: 10
  • x1
  • Speed: 01:34
Hitori №246807

Hitori №246807

  • Size: 13x13
  • Black Cells: 34
  • Rating: 4.56
  • Difficulty: 2 53%
  • 2021-03-22 13:37
  • Times solved: 14
  • x1
  • Speed: 01:17
Hitori №222307

Hitori №222307

  • Size: 25x25
  • Black Cells: 98
  • Rating: 4.56
  • Difficulty: 2 51%
  • 2020-12-08 11:37
  • Times solved: 12
  • x3
  • Speed: 05:28
Hitori №226668

Hitori №226668

  • Size: 20x20
  • Black Cells: 55
  • Rating: 4.56
  • Difficulty: 2 44%
  • 2020-12-30 06:07
  • Times solved: 6
  • x2
  • Speed: 02:49
Hitori №235402

Hitori №235402

  • Size: 5x5
  • Black Cells: 7
  • Rating: 4.56
  • Difficulty: 1 15%
  • 2021-04-08 12:07
  • Times solved: 14
  • x1
  • Speed: 00:10
Hitori №266689

Hitori №266689

  • Size: 9x9
  • Black Cells: 19
  • Rating: 4.56
  • Difficulty: 1 20%
  • 2021-04-14 02:07
  • Times solved: 6
  • x1
  • Speed: 00:52
Hitori №251875

Hitori №251875

  • Size: 10x10
  • Black Cells: 24
  • Rating: 4.56
  • Difficulty: 1 25%
  • 2021-04-05 22:37
  • Times solved: 8
  • x1
  • Speed: 00:42
Hitori №242477

Hitori №242477

  • Size: 21x21
  • Black Cells: 62
  • Rating: 4.55
  • Difficulty: 2 51%
  • 2021-02-11 12:07
  • Times solved: 10
  • x2+ Ore 10%
  • Speed: 03:59
Hitori №261562

Hitori №261562

  • Size: 9x9
  • Black Cells: 21
  • Rating: 4.55
  • Difficulty: 1 26%
  • 2021-04-08 18:37
  • Times solved: 9
  • x1
  • Speed: 00:37
Hitori №251596

Hitori №251596

  • Size: 16x16
  • Black Cells: 42
  • Rating: 4.55
  • Difficulty: 2 47%
  • 2021-03-18 01:07
  • Times solved: 14
  • x2+ Crystal 10%
  • Speed: 02:37
Hitori №237358

Hitori №237358

  • Size: 17x17
  • Black Cells: 42
  • Rating: 4.54
  • Difficulty: 3 67%
  • 2021-03-28 02:07
  • Times solved: 10
  • x2+ Ore 10%
  • Speed: 02:46
Hitori №258131

Hitori №258131

  • Size: 25x25
  • Black Cells: 82
  • Rating: 4.54
  • Difficulty: 3 78%
  • 2021-04-12 07:47
  • Times solved: 8
  • x3+ Coal 20%
  • Speed: 07:36
Hitori №264812

Hitori №264812

  • Size: 24x24
  • Black Cells: 79
  • Rating: 4.54
  • Difficulty: 3 58%
  • 2021-04-09 23:07
  • Times solved: 8
  • x3+ Crystal 20%
  • Speed: 05:11
Hitori №101818

Hitori №101818

  • Size: 22x22
  • Black Cells: 62
  • Rating: 4.54
  • Difficulty: 2 55%
  • 2019-09-29 08:03
  • Times solved: 27
  • x2+ Concrete Mixer 2%
  • Speed: 05:44
Hitori №231111

Hitori №231111

  • Size: 20x20
  • Black Cells: 52
  • Rating: 4.53
  • Difficulty: 2 44%
  • 2021-03-06 21:07
  • Times solved: 5
  • x2
  • Speed: 01:56
Hitori №227138

Hitori №227138

  • Size: 20x20
  • Black Cells: 53
  • Rating: 4.52
  • Difficulty: 1 25%
  • 2021-02-21 01:07
  • Times solved: 13
  • x2
  • Speed: 07:36
Hitori №239444

Hitori №239444

  • Size: 10x10
  • Black Cells: 25
  • Rating: 4.52
  • Difficulty: 1 25%
  • 2021-02-09 04:07
  • Times solved: 10
  • x1
  • Speed: 00:43
Hitori №207964

Hitori №207964

  • Size: 10x10
  • Black Cells: 25
  • Rating: 4.52
  • Difficulty: 1 22%
  • 2020-09-29 13:07
  • Times solved: 27
  • x1
  • Speed: 01:02
Hitori №259182

Hitori №259182

  • Size: 17x17
  • Black Cells: 52
  • Rating: 4.52
  • Difficulty: 3 68%
  • 2021-04-07 20:37
  • Times solved: 7
  • x2+ Water 10%
  • Speed: 02:55
Hitori №248762

Hitori №248762

  • Size: 22x22
  • Black Cells: 77
  • Rating: 4.52
  • Difficulty: 3 67%
  • 2021-04-08 20:07
  • Times solved: 9
  • x2+ Ore 10%
  • Speed: 06:50
Hitori №251105

Hitori №251105

  • Size: 11x11
  • Black Cells: 32
  • Rating: 4.52
  • Difficulty: 2 37%
  • 2021-03-11 08:07
  • Times solved: 13
  • x1
  • Speed: 01:24
Hitori №205902

Hitori №205902

  • Size: 18x18
  • Black Cells: 42
  • Rating: 4.51
  • Difficulty: 1 25%
  • 2020-11-05 00:47
  • Times solved: 22
  • x2
  • Speed: 02:38
Hitori №123277

Hitori №123277

  • Size: 25x25
  • Black Cells: 91
  • Rating: 4.5
  • Difficulty: 3 58%
  • 2020-03-17 02:07
  • Times solved: 15
  • x3+ Oil 30%
  • Speed: 08:53

Missions

Mission "Hitori - the Twelve chairs"

2019-04-09   Lysva   Stages10
T22 B4 S4 G21

Mission "Hitori Water"

2019-05-21   Bruno   Stages69
T15 B3 S4 G16

Mission "Hitori Pure Emerald"

2019-05-21   Bruno   Stages60
T11 B2 S1 G15
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