Easy Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 55: Two Easy (DiffLev 4) Voluntaryism Puzzles (numbers 189-190) 
 
-  Step-by-step instructions for solving  Puzzle 189, (65/144)   Diff: 4/9991
 -  Step-by-step instructions for solving  Puzzle 190, (74/144)   Diff: 4/9991