Volume 15, Issue 12, December 2020

The end of 2020 (Yipee!) We present 12 articles this month for the holiday season. Please stay well and safe. [Photo by Ian Coristine]

Sudoku Puzzle #72

I realized that over the last five years of monthly Sudoku articles, there has not been an occasion to introduce a puzzle requiring Step 8, which is “An Expansion of Dan’s Close Relationship Challenge”.