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Killer Sudoku-X example
Killer Sudoku-X logic puzzles

Also known as: Sumdoku-X, Addoku-X, Samunamupure-X

The rules of Killer Sudoku-X, like those of Killer Sudoku itself, present a wicked twist on those of Sudoku-X, since you must not only place each of the numbers 1 to 9 into each of the rows, columns, main diagonals and bold-lined 3-by-3 boxes but you must also place the numbers in each dashed-line cage so that they add up to the given total. No number can be repeated within a dashed-line cage.

There is only ever one solution, and it can always be reached via sensible logical deduction. Guessing is never necessary.

Solving Killer Sudoku-X can require a range of tactics - not only those from Sudoku-X and Kakuro, but also some methods unique to Killer Sudoku-X itself.


We can supply Killer Sudoku-X puzzles at different sizes and at a range of difficulties. All of our puzzles are either entirely hand-made or have significant manual input into the process.

Related Killer Sudoku variations (click for details and samples):
Sample Killer Sudoku-X puzzles (click to view press-ready PDF version):
Example Killer Sudoku X solution
Example Killer Sudoku X solution
Medium Killer Sudoku-X
Medium Killer Sudoku-X
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