The Times Big Book of Ultimate Killer Su Doku book 2

The ideal gift for su doku enthusiasts.

If you like to live dangerously and push beyond your mental comfort zone, steel yourself for The Times Big Book of Ultimate Killer Su Doku book 2, featuring The Times' toughest Ultimate Killer puzzles. A bumper collection of more than 360 puzzles for hard-core solvers, selected from The Times, these puzzles will challenge the sharpest minds.

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.

These puzzles are not for the fainthearted. They use the same 9x9 grid as Su Doku, with an added mathematical challenge. Not only must you complete every row, column, and cube so that they contain the digits 1-9, it is also necessary to ensure that the outlined cubes add up to the same number as well.

Unlike with previous books, there is no chance to ease yourself in with Easy, or even Tough puzzles: this book is the Ultimate Killer Su Doku – completely deadly.

Puzzles in this collection are taken from Times Ultimate Killer Su Doku Books 5, 6, and 7.