The Times Killer Su Doku Book 2

Beware: The Times Killer Su Doku gets about as close as possible to the label ‘unputdownable’. In Book 2, the challenge continues with the emphasis on the tougher and more deadly puzzles. Prepare to be rattled.

Killer Su Doku takes the number placing puzzle to the next level by adding an element of arithmetic. One cannot rely on logic alone. The puzzle uses the same 9x9 grid but there is a double test. The aim is not only to complete every row, column and cube so that it contains the digits ...