Difficult Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 24: Two Difficult (DiffLev 11-14) Discoverably Puzzles (numbers 127-128)
- Step-by-step instructions for solving Puzzle 127, (91/144) Diff: 11/998.9956.7962
- Step-by-step instructions for solving Puzzle 128, (84/144) Diff: 14/99.441B.2669.9432