Variations on Advanced Sudoku Logic Puzzles (Vol 1)

Chapter 47: Four Difficult Sudoku-16 Puzzles (numbers 157-160)

• Step-by-step instructions for solving Puzzle 157, (127/256)   Diff: 9/9.9999.9998
• Step-by-step instructions for solving Puzzle 158, (132/256)   Diff: 11/995.7999.9993
• Step-by-step instructions for solving Puzzle 159, (139/256)   Diff: 14/98.6599.8999.9954
• Step-by-step instructions for solving Puzzle 160, (146/256)   Diff: 14/99.6986.6999.9942