The Telegraph: Killer Sudoku 2

The ultimate test of logic, these challenging puzzles take sudoku to a whole new level. The killer sudoku is a favourite in the Telegraph newspaper and with puzzles across a range of difficulties included in the book, whether you're a seasoned expert or new to the game, you're sure to be utterly hoo [...]
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The ultimate test of logic, these challenging puzzles take sudoku to a whole new level. The killer sudoku is a favourite in the Telegraph newspaper and with puzzles across a range of difficulties included in the book, whether you're a seasoned expert or new to the game, you're sure to be utterly hooked.