The Times Killer Su Doku Book 1: 110 lethal Su Doku puzzles (The Times Su Doku)

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The puzzles use the same 9x9 grid as Su Doku but with an added mathematical challenge. Keep your mind sharp and test your powers of deductive reasoning. Store HoursEveryday : 10 a. If you like to live dangerously and push beyond your mental comfort zone, steel yourself for The Times' toughest Ultimate Killer puzzles. Puzzles in this collection are taken from Times Ultimate Killer Su Doku Books 5, 6 and 7. The aim is not only to complete every row, column and cube so that it contains the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number. Includes Deadly-level Killer puzzles, and Extra Deadly, to really test your limits: this is the only place you'll find such a torturous collection in a single book. The aim is not only to complete every row, column and cube so that it contains the digits 1 to 9, but also to make sure that the outlined sections, called cages, add up to the number given in each cage. 100 easy, 100 medium and 100 hard puzzles.