Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 53: Two Medium (DiffLev 5-6) Unperishably Puzzles (numbers 185-186)
- Step-by-step instructions for solving Puzzle 185, (69/144) Diff: 5/9.9932
- Step-by-step instructions for solving Puzzle 186, (84/144) Diff: 6/99.9994