Challenging Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 9: Six Challenging (DiffLev 16-17) tpsmith Puzzles (numbers 73-78) 
 
-  Step-by-step instructions for solving  Puzzle 73, (87/144)   Diff: 16/9552.1121.3779.9983
 -  Step-by-step instructions for solving  Puzzle 74, (93/144)   Diff: 16/9467.3224.4799.7332
 -  Step-by-step instructions for solving  Puzzle 75, (95/144)   Diff: 16/9654.3622.5436.9993
 -  Step-by-step instructions for solving  Puzzle 76, (92/144)   Diff: 17/7.5652.4856.5587.6463
 -  Step-by-step instructions for solving  Puzzle 77, (97/144)   Diff: 17/9.9645.3563.4765.9943
 -  Step-by-step instructions for solving  Puzzle 78, (99/144)   Diff: 17/8.8652.1512.1369.9992