Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 3: Twelve Medium (DiffLev 5) Sudoku-5 Puzzles (numbers 1-12) 
 
-  Step-by-step instructions for solving  Puzzle 1, (17/25)   Diff: 5/3.5432
 -  Step-by-step instructions for solving  Puzzle 2, (18/25)   Diff: 5/4.4343
 -  Step-by-step instructions for solving  Puzzle 3, (18/25)   Diff: 5/2.4453
 -  Step-by-step instructions for solving  Puzzle 4, (19/25)   Diff: 5/5.3353
 -  Step-by-step instructions for solving  Puzzle 5, (19/25)   Diff: 5/4.4551
 -  Step-by-step instructions for solving  Puzzle 6, (19/25)   Diff: 5/4.4542
 -  Step-by-step instructions for solving  Puzzle 7, (19/25)   Diff: 5/3.6433
 -  Step-by-step instructions for solving  Puzzle 8, (20/25)   Diff: 5/5.5334
 -  Step-by-step instructions for solving  Puzzle 9, (20/25)   Diff: 5/4.3445
 -  Step-by-step instructions for solving  Puzzle 10, (20/25)   Diff: 5/3.4454
 -  Step-by-step instructions for solving  Puzzle 11, (21/25)   Diff: 5/4.4553
 -  Step-by-step instructions for solving  Puzzle 12, (21/25)   Diff: 5/3.6444