Conquered Classic Sudoku and looking for a new challenge? Killer Sudoku puzzles are a great way to keep entertained, while also training your brain. This collection of 100 POCKET SIZE HARD LEVEL Killer Sudoku takes our popular large size puzzles and presents them in a new handy size. Convenient to carry with you; on the commute, travelling, at the dentist's office, anywhere The puzzles will test your logic...
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