Medium Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 7: Twelve Medium (DiffLev 5-6) HyperSudoku-12 Puzzles (numbers 49-60) 
 
-  Step-by-step instructions for solving  Puzzle 49, (70/144)   Diff: 5/9.9642
 -  Step-by-step instructions for solving  Puzzle 50, (75/144)   Diff: 5/9.9994
 -  Step-by-step instructions for solving  Puzzle 51, (76/144)   Diff: 5/9.9993
 -  Step-by-step instructions for solving  Puzzle 52, (77/144)   Diff: 5/9.9991
 -  Step-by-step instructions for solving  Puzzle 53, (79/144)   Diff: 5/9.9995
 -  Step-by-step instructions for solving  Puzzle 54, (79/144)   Diff: 5/9.9992
 -  Step-by-step instructions for solving  Puzzle 55, (74/144)   Diff: 6/99.9661
 -  Step-by-step instructions for solving  Puzzle 56, (76/144)   Diff: 6/99.9973
 -  Step-by-step instructions for solving  Puzzle 57, (81/144)   Diff: 6/99.9994
 -  Step-by-step instructions for solving  Puzzle 58, (82/144)   Diff: 6/99.9962
 -  Step-by-step instructions for solving  Puzzle 59, (85/144)   Diff: 6/99.9994
 -  Step-by-step instructions for solving  Puzzle 60, (88/144)   Diff: 6/99.9993