Variations on Advanced Sudoku Logic Puzzles (Vol 1)

Chapter 18: Four Challenging HyperSudoku-12 Puzzles (numbers 53-56)

• Step-by-step instructions for solving Puzzle 53, (88/144)   Diff: 16/6333.2133.4769.9991
• Step-by-step instructions for solving Puzzle 54, (98/144)   Diff: 16/9554.4345.6999.9522
• Step-by-step instructions for solving Puzzle 55, (97/144)   Diff: 17/9.9854.222B.3544.8995
• Step-by-step instructions for solving Puzzle 56, (96/144)   Diff: 20/9441.B223.3578.4575.5495