Variations on Advanced Sudoku Logic Puzzles (Vol 1)
Chapter 9: Four Easy Sudoku-12up Puzzles (numbers 21-24)
- Step-by-step instructions for solving Puzzle 21, (51/144) Diff: 3/992
- Step-by-step instructions for solving Puzzle 22, (52/144) Diff: 3/992
- Step-by-step instructions for solving Puzzle 23, (57/144) Diff: 3/995
- Step-by-step instructions for solving Puzzle 24, (69/144) Diff: 4/9992