Killer Sudoku X

Yes, yet another variant of the very popular puzzle that has taken the world by storm - of course we are talking about sudoku! This time not only do you have the killer sudoku grid, but also the 'X' rule as in Sudoku X, meaning that you have another constraint, and therefore piece of information, that you can use to help solve these puzzles!

Click to Play a Killer Sudoku X sample puzzle now 6x6.

If you prefer larger Killer Sudoku X, then you can now (June 2009) play 9x9 Big Killer Sudoku X online too!

Killer Sudoku X: Choose Your Puzzle

Killer Sudoku X

Easy

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Medium

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Tricky

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Difficult

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Killer Sudoku X

Killer Sudoku X: Choose Your Puzzle

Easy

Medium

Tricky

Difficult