Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 13: Twelve Medium (DiffLev 7) Sudoku-5B Puzzles (numbers 121-132) 
 
-  Step-by-step instructions for solving  Puzzle 121, (19/25)   Diff: 7/A12.6432
 -  Step-by-step instructions for solving  Puzzle 122, (20/25)   Diff: 7/342.1136
 -  Step-by-step instructions for solving  Puzzle 123, (20/25)   Diff: 7/342.1136
 -  Step-by-step instructions for solving  Puzzle 124, (20/25)   Diff: 7/342.1136
 -  Step-by-step instructions for solving  Puzzle 125, (20/25)   Diff: 7/331.1354
 -  Step-by-step instructions for solving  Puzzle 126, (20/25)   Diff: 7/323.2136
 -  Step-by-step instructions for solving  Puzzle 127, (20/25)   Diff: 7/322.2443
 -  Step-by-step instructions for solving  Puzzle 128, (20/25)   Diff: 7/312.3443
 -  Step-by-step instructions for solving  Puzzle 129, (20/25)   Diff: 7/311.3453
 -  Step-by-step instructions for solving  Puzzle 130, (20/25)   Diff: 7/222.1355
 -  Step-by-step instructions for solving  Puzzle 131, (21/25)   Diff: 7/222.4344
 -  Step-by-step instructions for solving  Puzzle 132, (21/25)   Diff: 7/124.4451