Easy Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 50: Two Easy (DiffLev 4) Unformalized Puzzles (numbers 179-180)
- Step-by-step instructions for solving Puzzle 179, (67/144) Diff: 4/9992
- Step-by-step instructions for solving Puzzle 180, (69/144) Diff: 4/9991