Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 46: Two Easy (DiffLev 3-4) Stickhandler Puzzles (numbers 171-172) 
 
-  Step-by-step instructions for solving  Puzzle 171, (49/144)   Diff: 3/991
 -  Step-by-step instructions for solving  Puzzle 172, (71/144)   Diff: 4/9991