Variations on Advanced Sudoku Logic Puzzles (Vol 1)
Chapter 4: Four Medium Sudoku-12 Puzzles (numbers 5-8)
- Step-by-step instructions for solving Puzzle 5, (67/144) Diff: 5/9.9981
- Step-by-step instructions for solving Puzzle 6, (79/144) Diff: 6/99.9971
- Step-by-step instructions for solving Puzzle 7, (81/144) Diff: 8/9999.8974
- Step-by-step instructions for solving Puzzle 8, (81/144) Diff: 8/9999.8652