Challenging Sudoku Twelve Logic Puzzles (Vol 1)

Chapter 30: Two Challenging (DiffLev 20) Headstrongly Puzzles (numbers 139-140)

• Step-by-step instructions for solving Puzzle 139, (89/144)   Diff: 20/9231.1AAA.1356.4476.9794
• Step-by-step instructions for solving Puzzle 140, (90/144)   Diff: 20/9574.5431.C142.1333.9973