Easy Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 30: Two Easy (DiffLev 3-4) Headstrongly Puzzles (numbers 139-140)
- Step-by-step instructions for solving Puzzle 139, (48/144) Diff: 3/992
- Step-by-step instructions for solving Puzzle 140, (68/144) Diff: 4/9993