Difficult Sudoku Twelve Logic Puzzles (Vol 1)

Chapter 42: Two Difficult (DiffLev 10-13) Productively Puzzles (numbers 163-164)

• Step-by-step instructions for solving Puzzle 163, (84/144)   Diff: 10/99.9964.4434
• Step-by-step instructions for solving Puzzle 164, (95/144)   Diff: 13/9.9247.8768.8984