Killer SudokuX puzzles and instructions
Play free Killer SudokuX puzzles:
Killer SudokuX puzzles include all the rules of regular SudokuX but add in dashedline 'cages' which must sum to given values. Killer SudokuX is also sometimes known as SumdokuX, MathdokuX or AddokuX.
How to solve Killer SudokuX puzzles
Killer SudokuX adds both diagonal "X" regions and also additional "Killer" regions to a regular Sudoku. Taking the "X" part first, while in a regular Sudoku puzzle you must place each of the numbers 1 to 9 (or 1 to the size of the puzzle) into each of the rows, columns and boldlined boxes, SudokuX extends this with two new diagonal regions which must also contain one of each number. These are marked on the grid so you don't forget them.
Taking the "Killer" part next, Killer Sudoku adds dashedline cages which must contain numbers that add up to a given total  and no digit can repeat in any dashedline cage.
So Killer SudokuX combines the SudokuX and Killer Sudoku variants of Sudoku into a single puzzle.
Look at the solved Killer SudokuX puzzle on the left. In this 6x6 puzzle notice how each of the marked diagonals contains one each of 1 to 6. Also consider the '7' cage in the topmiddle of the puzzle. The values in it are 5 and 2, which add up to the given clue, 7.
Remember that you cannot repeat a number within a cage. This means that the solution to the 7 cage on the righthand side of the puzzle must be 1+2+4 in some order, since any other solution over three squares would repeat a number. For example 2+2+3 would be invalid.
Every Killer SudokuX 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 SudokuX 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 16, 18 or 19 once each into every row, column, boldlined rectangle and marked diagonal.
Other types of puzzle
It's not just Killer SudokuX you can solve online at puzzlemix. You can also solve logic puzzles that include these:
Keywords
Are you searching for help with Killer SudokuX puzzles? Stuck on solving MathdokuX? Don't know the instructions for SumdokuX? Need AdddokuX instructions? Want solving hints and tips for Killer SudokuX? Then puzzlemix is the place for you to play Killer SudokuX puzzles online.
External links
Looking for printed Killer SudokuX puzzles? Visit Sudoku Xtra for puzzle magazines and books.
Or are you looking for a Killer SudokuX puzzle supplier? If so then check out Any Puzzle Media, my puzzle production company.
