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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 №205612

Hitori №205612

  • Size: 25x25
  • Black Cells: 80
  • Rating: 5.119
  • Difficulty: 3 67%
  • 2020-09-15 07:07
  • Times solved: 21
  • x3
  • Speed: 08:21
Hitori №230210

Hitori №230210

  • Size: 18x18
  • Black Cells: 48
  • Rating: 5.027
  • Difficulty: 3 58%
  • 2021-01-13 01:07
  • Times solved: 10
  • x2
  • Speed: 05:12
Hitori №207177

Hitori №207177

  • Size: 12x12
  • Black Cells: 27
  • Rating: 4.972
  • Difficulty: 1 25%
  • 2020-10-16 15:07
  • Times solved: 32
  • x1
  • Speed: 01:43
Hitori №202175

Hitori №202175

  • Size: 22x22
  • Black Cells: 69
  • Rating: 4.945
  • Difficulty: 2 40%
  • 2020-09-02 08:07
  • Times solved: 22
  • x2+ Ore 20%
  • Speed: 05:54
Hitori №212705

Hitori №212705

  • Size: 25x25
  • Black Cells: 94
  • Rating: 4.938
  • Difficulty: 2 50%
  • 2020-10-29 00:47
  • Times solved: 23
  • x3
  • Speed: 09:48
Hitori №220248

Hitori №220248

  • Size: 10x10
  • Black Cells: 28
  • Rating: 4.907
  • Difficulty: 1 15%
  • 2020-12-01 08:07
  • Times solved: 35
  • x1
  • Speed: 01:04
Hitori №197416

Hitori №197416

  • Size: 6x6
  • Black Cells: 10
  • Rating: 4.905
  • Difficulty: 1 22%
  • 2020-09-29 18:08
  • Times solved: 36
  • x1+ Crystal 10%
  • Speed: 00:21
Hitori №208657

Hitori №208657

  • Size: 12x12
  • Black Cells: 30
  • Rating: 4.896
  • Difficulty: 2 36%
  • 2020-11-04 16:07
  • Times solved: 16
  • x1
  • Speed: 01:08
Hitori №202387

Hitori №202387

  • Size: 18x18
  • Black Cells: 50
  • Rating: 4.896
  • Difficulty: 2 40%
  • 2020-10-05 16:07
  • Times solved: 19
  • x2+ Water 20%
  • Speed: 04:37
Hitori №183801

Hitori №183801

  • Size: 25x25
  • Black Cells: 100
  • Rating: 4.894
  • Difficulty: 2 44%
  • 2020-09-18 01:07
  • Times solved: 12
  • x3+ Ore 30%
  • Speed: 08:22
Hitori №201412

Hitori №201412

  • Size: 19x19
  • Black Cells: 53
  • Rating: 4.887
  • Difficulty: 2 37%
  • 2020-10-29 08:47
  • Times solved: 27
  • x2+ Ore 20%
  • Speed: 03:22
Hitori №218884

Hitori №218884

  • Size: 9x9
  • Black Cells: 25
  • Rating: 4.883
  • Difficulty: 1 25%
  • 2020-12-12 03:07
  • Times solved: 26
  • x1
  • Speed: 00:50
Hitori №195050

Hitori №195050

  • Size: 22x22
  • Black Cells: 74
  • Rating: 4.883
  • Difficulty: 2 54%
  • 2020-09-03 09:07
  • Times solved: 25
  • x2+ Crystal 20%
  • Speed: 08:12
Hitori №205137

Hitori №205137

  • Size: 9x9
  • Black Cells: 21
  • Rating: 4.881
  • Difficulty: 1 23%
  • 2020-10-11 15:07
  • Times solved: 22
  • x1
  • Speed: 00:58
Hitori №219232

Hitori №219232

  • Size: 5x5
  • Black Cells: 7
  • Rating: 4.878
  • Difficulty: 1 21%
  • 2020-11-24 17:07
  • Times solved: 28
  • x1
  • Speed: 00:21
Hitori №206697

Hitori №206697

  • Size: 8x8
  • Black Cells: 16
  • Rating: 4.877
  • Difficulty: 1 22%
  • 2020-09-29 18:23
  • Times solved: 25
  • x1
  • Speed: 00:34
Hitori №216793

Hitori №216793

  • Size: 5x5
  • Black Cells: 7
  • Rating: 4.875
  • Difficulty: 1 11%
  • 2020-11-23 17:07
  • Times solved: 29
  • x1
  • Speed: 00:09
Hitori №202912

Hitori №202912

  • Size: 20x20
  • Black Cells: 54
  • Rating: 4.861
  • Difficulty: 2 44%
  • 2020-11-04 00:47
  • Times solved: 21
  • x2+ Ore 20%
  • Speed: 03:29
Hitori №217264

Hitori №217264

  • Size: 9x9
  • Black Cells: 22
  • Rating: 4.861
  • Difficulty: 1 27%
  • 2020-11-12 17:07
  • Times solved: 15
  • x1
  • Speed: 00:35
Hitori №201144

Hitori №201144

  • Size: 10x10
  • Black Cells: 23
  • Rating: 4.861
  • Difficulty: 1 27%
  • 2020-10-15 10:40
  • Times solved: 13
  • x1+ Ore 10%
  • Speed: 00:46
Hitori №204566

Hitori №204566

  • Size: 7x7
  • Black Cells: 14
  • Rating: 4.851
  • Difficulty: 1 17%
  • 2020-09-28 12:37
  • Times solved: 23
  • x1+ Water 10%
  • Speed: 00:34
Hitori №206646

Hitori №206646

  • Size: 9x9
  • Black Cells: 19
  • Rating: 4.849
  • Difficulty: 1 29%
  • 2020-10-07 01:07
  • Times solved: 32
  • x1
  • Speed: 00:59
Hitori №207964

Hitori №207964

  • Size: 10x10
  • Black Cells: 25
  • Rating: 4.848
  • Difficulty: 1 24%
  • 2020-09-29 13:07
  • Times solved: 17
  • x1
  • Speed: 00:43
Hitori №211604

Hitori №211604

  • Size: 8x8
  • Black Cells: 18
  • Rating: 4.848
  • Difficulty: 2 39%
  • 2020-11-03 18:18
  • Times solved: 14
  • x1
  • Speed: 00:47
Hitori №212893

Hitori №212893

  • Size: 9x9
  • Black Cells: 22
  • Rating: 4.848
  • Difficulty: 2 34%
  • 2020-10-21 05:07
  • Times solved: 15
  • x1
  • Speed: 01:09
Hitori №214187

Hitori №214187

  • Size: 10x10
  • Black Cells: 20
  • Rating: 4.848
  • Difficulty: 1 15%
  • 2020-11-04 03:07
  • Times solved: 14
  • x1
  • Speed: 00:40
Hitori №183321

Hitori №183321

  • Size: 7x7
  • Black Cells: 15
  • Rating: 4.843
  • Difficulty: 1 26%
  • 2020-06-15 11:00
  • Times solved: 38
  • x1+ Ore 10%
  • Speed: 00:34
Hitori №215141

Hitori №215141

  • Size: 8x8
  • Black Cells: 15
  • Rating: 4.837
  • Difficulty: 1 14%
  • 2020-11-20 10:07
  • Times solved: 16
  • x1
  • Speed: 00:27
Hitori №216960

Hitori №216960

  • Size: 7x7
  • Black Cells: 13
  • Rating: 4.837
  • Difficulty: 1 18%
  • 2020-12-02 22:07
  • Times solved: 16
  • x1
  • Speed: 00:18
Hitori №226736

Hitori №226736

  • Size: 9x9
  • Black Cells: 22
  • Rating: 4.837
  • Difficulty: 1 23%
  • 2020-12-17 19:37
  • Times solved: 15
  • x1
  • Speed: 00:44

Missions

Mission "Hitori Pure Emerald"

2019-05-21   Bruno   Stages60
T11 B2 S1 G15

Mission "Ore Hitori"

2019-06-08   Bruno   Stages50
T12 B0 S2 G14

Mission "Solve Hitori"

2019-03-23   belyak62   Stages6
T15 B5 S3 G46
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