Variations on Advanced Sudoku Logic Puzzles (Vol 1)

Chapter 11: Four Difficult Sudoku-12up Puzzles (numbers 29-32)

• Step-by-step instructions for solving Puzzle 29, (79/144)   Diff: 10/99.9755.4672
• Step-by-step instructions for solving Puzzle 30, (84/144)   Diff: 11/984.9867.9952
• Step-by-step instructions for solving Puzzle 31, (86/144)   Diff: 14/99.8754.3752.7792
• Step-by-step instructions for solving Puzzle 32, (95/144)   Diff: 14/94.5753.4599.9963