Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 47: Two Medium (DiffLev 7-8) Supernotably Puzzles (numbers 173-174)
- Step-by-step instructions for solving Puzzle 173, (79/144) Diff: 7/999.9961
- Step-by-step instructions for solving Puzzle 174, (88/144) Diff: 8/9879.9993