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Prepare yourself for the toughest Su Doku challenge there is. These diabolically difficult Ultimate Killer Su Doku puzzles will really put your brainpower to th
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Perfect for coffee breaks, commutes or relaxing at home, this bumper collection of 300 brand new ultimate killer sudoku puzzles is guaranteed to provide you wit
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Type: BOOK - Published: 2018-01-11 - Publisher: Times Books
You don't need to be a mathematical genius to solve the treacherous puzzles in this collection of Fiendishly difficult puzzles--it's simply a question of logic.
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Type: BOOK - Published: 2015-03-12 - Publisher: Collins
The latest volume in the hugely popular Killer Su Doku series from the puzzle suppliers to the Times, featuring the highest-quality puzzles with an extra elemen