Just when you thought it was safe to pick up a pencil
Killer Su Doku is based on the original Su Doku grid, with the
same rules and numbers--1 to 9--but with an added deadly twist.
This time there is an element of arithmetic involved and there are
few, if any, clues. The aim is to not only complete every row,
column, and cube so that it contains the digits 1 to 9, but to also
fill in the outlined cubes so they add up to the same number.
Hints to solve the puzzle are hidden in the joined squares where
only one combination of numbers applies. In the case of joined
squares, if the printed number is 3, it should be 1 and 2 that go
into the squares. Likewise, in the case of three joined squares, if
the printed number is 6, the only combination possible is 1, 2, and
3.
To add one final fiendish level, each puzzle also has a time
worked out by its Japanese creators so you can try to beat the
clock.
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