Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 10: Six Easy (DiffLev 4) tpsmith Puzzles (numbers 79-84) 
 
-  Step-by-step instructions for solving  Puzzle 79, (61/144)   Diff: 4/9952
 -  Step-by-step instructions for solving  Puzzle 80, (62/144)   Diff: 4/9961
 -  Step-by-step instructions for solving  Puzzle 81, (64/144)   Diff: 4/9991
 -  Step-by-step instructions for solving  Puzzle 82, (67/144)   Diff: 4/9994
 -  Step-by-step instructions for solving  Puzzle 83, (74/144)   Diff: 4/9992
 -  Step-by-step instructions for solving  Puzzle 84, (77/144)   Diff: 4/9992