Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 50: Two Medium (DiffLev 6-8) Unformalized Puzzles (numbers 179-180)
- Step-by-step instructions for solving Puzzle 179, (78/144) Diff: 6/99.9882
- Step-by-step instructions for solving Puzzle 180, (91/144) Diff: 8/9799.9996