Challenging Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 24: Two Challenging (DiffLev 16-17) Discoverably Puzzles (numbers 127-128)
- Step-by-step instructions for solving Puzzle 127, (85/144) Diff: 16/9852.3674.5677.2336
- Step-by-step instructions for solving Puzzle 128, (83/144) Diff: 17/8.531A.1432.5459.9951