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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?
 

 

Killer Sudoku puzzles and instructions


Play free Killer Sudoku puzzles:
Killer   8th Oct
  Killer Sudoku 736 
Killer   30th Sep
  Killer Sudoku-6 127 
Killer   28th Sep
  Killer Sudoku 735 
Killer   2nd Sep
  Killer Sudoku-6 126 
Killer Sudoku puzzles include all the rules of regular Sudoku but add in dashed-line 'cages' which must sum to given values. Killer Sudoku is also sometimes known as Sumdoku, Mathdoku or Addoku.

How to solve Killer Sudoku puzzles
The name 'Killer' Sudoku arises because of the wicked twist on the standard Sudoku puzzle, since you must not only place each of the numbers 1 to 9 (or 1 to the size of the puzzle) into each of the rows, columns and bold-lined 3x3 (or other size) boxes but you must also place the numbers into each dashed-line cage so that they add up to its given total - and without repeating a digit in a dashed-line cage.

Killer Sudoku exampleLook at the solved puzzle on the left. In this 6x6 puzzle the right-most three squares in the first row must add up to 6. The values given are 1, 3 and 2 which are of course fine since 1+3+2=6. But because you cannot repeat a number within a cage this means that we knew the contents were 1+2+3 in some order even before we started solving (although any other solution, such as 1+1+4, would in this puzzle be disallowed by the standard rules of Sudoku in any case).

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

Killer Sudoku puzzles on puzzlemix appear at a wide range of sizes and difficulties. Usually they are 6x6, 8x8 or 9x9. In each respective case you must place 1-6, 1-8 or 1-9 once each into every row, column and bold-lined rectangle.

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

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

External links

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

Or are you looking for a Killer Sudoku 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