Difficult Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 37: Two Difficult (DiffLev 13-14) Outfieldsman Puzzles (numbers 153-154)
- Step-by-step instructions for solving Puzzle 153, (86/144) Diff: 13/9.8543.2568.9787
- Step-by-step instructions for solving Puzzle 154, (91/144) Diff: 14/97.4554.6569.9982