Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 49: Two Medium (DiffLev 6-7) Turbomachine Puzzles (numbers 177-178)
- Step-by-step instructions for solving Puzzle 177, (82/144) Diff: 6/99.9973
- Step-by-step instructions for solving Puzzle 178, (86/144) Diff: 7/999.9994