Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 15: Twelve Medium (DiffLev 5) Sudoku-5C Puzzles (numbers 145-156) 
 
-  Step-by-step instructions for solving  Puzzle 145, (17/25)   Diff: 5/6.4241
 -  Step-by-step instructions for solving  Puzzle 146, (18/25)   Diff: 5/4.4352
 -  Step-by-step instructions for solving  Puzzle 147, (18/25)   Diff: 5/2.3544
 -  Step-by-step instructions for solving  Puzzle 148, (19/25)   Diff: 5/5.5351
 -  Step-by-step instructions for solving  Puzzle 149, (19/25)   Diff: 5/5.4442
 -  Step-by-step instructions for solving  Puzzle 150, (19/25)   Diff: 5/4.4641
 -  Step-by-step instructions for solving  Puzzle 151, (19/25)   Diff: 5/4.3552
 -  Step-by-step instructions for solving  Puzzle 152, (19/25)   Diff: 5/4.3534
 -  Step-by-step instructions for solving  Puzzle 153, (19/25)   Diff: 5/4.3462
 -  Step-by-step instructions for solving  Puzzle 154, (19/25)   Diff: 5/3.4462
 -  Step-by-step instructions for solving  Puzzle 155, (19/25)   Diff: 5/2.4742
 -  Step-by-step instructions for solving  Puzzle 156, (20/25)   Diff: 5/4.5542