Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 8: Four Easiest Sudoku-7B Puzzles (numbers 33-36) 
 
-  Step-by-step instructions for solving  Puzzle 33, (17/49)   Diff: 2/94
 -  Step-by-step instructions for solving  Puzzle 34, (17/49)   Diff: 2/92
 -  Step-by-step instructions for solving  Puzzle 35, (17/49)   Diff: 2/91
 -  Step-by-step instructions for solving  Puzzle 36, (19/49)   Diff: 2/91