Challenging Sudoku Twelve Logic Puzzles (Vol 1)

Chapter 49: Two Challenging (DiffLev 18-19) Turbomachine Puzzles (numbers 177-178)

• Step-by-step instructions for solving Puzzle 177, (90/144)   Diff: 18/93.3463.2436.4445.8584
• Step-by-step instructions for solving Puzzle 178, (94/144)   Diff: 19/512.3222.1237.9999.5462