Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 44: Two Medium (DiffLev 6-7) Recognizably Puzzles (numbers 167-168)
- Step-by-step instructions for solving Puzzle 167, (71/144) Diff: 6/99.9785
- Step-by-step instructions for solving Puzzle 168, (85/144) Diff: 7/999.9994