Variations on Difficult Sudoku Logic Puzzles (Vol 1)

Chapter 4: Eight Difficult Sudoku-X Puzzles (numbers 9-16)

• Step-by-step instructions for solving Puzzle 9, (56/81)   Diff: 11/634.3523.3697
• Step-by-step instructions for solving Puzzle 10, (55/81)   Diff: 12/7423.2146.5891
• Step-by-step instructions for solving Puzzle 11, (63/81)   Diff: 12/3345.7346.9891
• Step-by-step instructions for solving Puzzle 12, (57/81)   Diff: 14/85.4312.1455.3646
• Step-by-step instructions for solving Puzzle 13, (57/81)   Diff: 14/63.1324.51B3.6885
• Step-by-step instructions for solving Puzzle 14, (59/81)   Diff: 14/21.1135.3343.6993
• Step-by-step instructions for solving Puzzle 15, (60/81)   Diff: 14/33.4B1A.1224.9996
• Step-by-step instructions for solving Puzzle 16, (61/81)   Diff: 14/31.3433.3584.8941