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Sudoku Xtra, written by Dr Gareth Moore
Sudoku Xtra 24
logic puzzle compendium
Printed puzzles from Dr Gareth Moore

Sudoku
 
Hanjie
 
Kakuro
 
Futoshiki
 
Calcudoku
 
Hitori
 
Killer Sudoku
 
Nurikabe
 
Slitherlink
 
Skyscraper

Sudoku-X
 
Jigsaw Sudoku
 
Consecutive Sudoku
 
Kropki Sudoku
 
Sudoku XV
 
Oddpair Sudoku
 
Toroidal Sudoku
 
Killer Sudoku-X
 
Killer Sudoku
Pro

 
Jigsaw Killer
Sudoku

Looking for puzzles for your book, magazine or newspaper?
 

 

Hitori puzzles and instructions


Play free Hitori puzzles:
Hitori   30th May
  Hitori 720 
Hitori   24th May
  Hitori 718 
Hitori   12th Apr
  Hitori 708 
Hitori   22nd Mar
  Hitori 705 
Hitori puzzles are in one sense a little like an "inverted Sudoku", given that they include the row and column constraints of that puzzle but start with all digits placed. In Hitori the aim is to hide digits such that no digit repeats, while also following some additional rules specific to Hitori.

How to solve Hitori puzzles
In a Hitori puzzle you start with a full grid and must eliminate digits (or letters in some puzzles) by shading them in so that no digit occurs more than once in any row or column. Unlike Sudoku, there is no requirement to have every digit in each row or column - this would not be possible in any case.

Additionally, the finished grid must be a valid "Japanese crossword". What this means in practice is that all of the unshaded squares must be connected into one single region, just as they are in a traditional British or US crossword, but also that no shaded square can touch any other shaded square (except diagonally).

Hitori exampleThe rules of Hitori, then, can be summarised as:

  • Shade some squares so that no unshaded digit or letter is repeated in a row or column.
  • No shaded square can touch any other shaded square horizontally or vertically (but they may touch diagonally).
  • You must be able to 'travel' from any unshaded square to any other unshaded square simply by moving left/right/up/down from unshaded square to unshaded square.

Every Hitori puzzle only ever has one possible solution, and it can always be reached via reasonable logical deduction. In other words, guessing is never required.

Hitori puzzles on puzzlemix appear at a wide range of sizes and difficulties. The most common sizes are 7x7, 8x8, 10x10 and 12x12.

Other types of puzzle
It's not just Hitori you can solve online at puzzlemix. You can also solve logic puzzles that include these:
CalcudokuConsecutive SudokuFutoshikiHanjie
Jigsaw SudokuKakuroKiller Jigsaw SudokuKiller Sudoku
Killer Sudoku ProKiller Sudoku-XKropki SudokuNurikabe
Odd Pair SudokuSkyscraperSlitherlinkSudoku
Sudoku XVSudoku-XToroidal Sudoku

Keywords
Are you searching for help with Hitori puzzles? Stuck on solving Hitori? Don't know the instructions for Hitori? Need Hitori instructions? Want solving hints and tips for Hitori? Then puzzlemix is the place for you to play Hitori puzzles online.

External links

Looking for printed Hitori puzzles? Visit Sudoku Xtra for puzzle magazines and books.

Or are you looking for a Hitori puzzle supplier? If so then check out Any Puzzle Media, my puzzle production company.


All site contents ©Gareth Moore 2005-2017 - email gareth@puzzlemix.com - publishers please visit Any Puzzle Media