Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 9: Twelve Medium (DiffLev 7) Sudoku-5-Spot Puzzles (numbers 73-84) 
 
-  Step-by-step instructions for solving  Puzzle 73, (20/25)   Diff: 7/325.3331
 -  Step-by-step instructions for solving  Puzzle 74, (20/25)   Diff: 7/222.4352
 -  Step-by-step instructions for solving  Puzzle 75, (20/25)   Diff: 7/222.4352
 -  Step-by-step instructions for solving  Puzzle 76, (20/25)   Diff: 7/1A1.5561
 -  Step-by-step instructions for solving  Puzzle 77, (21/25)   Diff: 7/342.2361
 -  Step-by-step instructions for solving  Puzzle 78, (21/25)   Diff: 7/323.2353
 -  Step-by-step instructions for solving  Puzzle 79, (21/25)   Diff: 7/252.1443
 -  Step-by-step instructions for solving  Puzzle 80, (21/25)   Diff: 7/232.3641
 -  Step-by-step instructions for solving  Puzzle 81, (21/25)   Diff: 7/1A1.3663
 -  Step-by-step instructions for solving  Puzzle 82, (21/25)   Diff: 7/1A1.3663
 -  Step-by-step instructions for solving  Puzzle 83, (21/25)   Diff: 7/123.2454
 -  Step-by-step instructions for solving  Puzzle 84, (21/25)   Diff: 7/113.4651