Variations on Advanced Sudoku Logic Puzzles (Vol 1)
Chapter 10: Four Medium Sudoku-12up Puzzles (numbers 25-28)
- Step-by-step instructions for solving Puzzle 25, (69/144) Diff: 5/9.9933
- Step-by-step instructions for solving Puzzle 26, (71/144) Diff: 7/999.8532
- Step-by-step instructions for solving Puzzle 27, (76/144) Diff: 7/999.9962
- Step-by-step instructions for solving Puzzle 28, (74/144) Diff: 8/9993.5544