14 January 2015


Title: Countdown
Rating: 3/5

There is renewed interest in space travel of late.  Perhaps the astronauts could take along some of these puzzles for the downtime?

The official rules:

  • The digits 1 through 9 appear in each row and each column exactly once.
  • Digits in each shaded region must add to the indicated sum.   
  • Squares with multiple colors contain a number that’s used in the sum for adjacent regions of each of those colors.
  • Remember: numbers can repeat within a shaded region if that doesn't violate the first rule.

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