Challenge yourself at home with word and number puzzles
This sixth and toughest addition to the successful Times Killer Su Doku
series will test your skills to the limit, adding the challenge of
arithmetic and taking Su Doku to a new and even deadlier level of
difficulty.
The puzzles use the same 9x9 grid as Su Doku but with an added
mathematical challenge. 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 as well.
With 150 new Tough and Deadly Killer Su Doku puzzles, there is no chance
to ease yourself in with easy puzzles. For those who like to live
dangerously and push beyond their mental comfort zone, steel yourself
for The Times' toughest collection yet.