Difficult Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 25: Two Difficult (DiffLev 12-14) Exhaustingly Puzzles (numbers 129-130)
- Step-by-step instructions for solving Puzzle 129, (86/144) Diff: 12/9645.8999.6753
- Step-by-step instructions for solving Puzzle 130, (86/144) Diff: 14/95.4233.5799.9873