08 July 2015

Fundamentals

Title: Fundamentals
Rating: 4/5



This is another toral board puzzle, to join the ranks of Prorus and Circuitry.  As a reminder about the alteration, check out the last rule below.

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.
  • The board is a “toral board,” that is, cells at the end of one row are considered adjacent to those at the beginning of the same row; cells at the end of one column are considered adjacent to those at the beginning of the same column, and all corner cells are considered adjacent. 

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