Medium Sudoku Twelve Logic Puzzles (Vol 1)
Chapter 22: Two Medium (DiffLev 5-7) Considerably Puzzles (numbers 123-124)
- Step-by-step instructions for solving Puzzle 123, (71/144) Diff: 5/9.9972
- Step-by-step instructions for solving Puzzle 124, (79/144) Diff: 7/999.9961