Medium Sudoku Seven Logic Puzzles (Vol 1) 
 Chapter 15: Fourteen Medium (DiffLev 5-6) Sudoku-7D Puzzles (numbers 163-176) 
 
-  Step-by-step instructions for solving  Puzzle 163, (29/49)   Diff: 5/7.6951
 -  Step-by-step instructions for solving  Puzzle 164, (33/49)   Diff: 5/8.7576
 -  Step-by-step instructions for solving  Puzzle 165, (33/49)   Diff: 5/8.4794
 -  Step-by-step instructions for solving  Puzzle 166, (33/49)   Diff: 5/4.3995
 -  Step-by-step instructions for solving  Puzzle 167, (35/49)   Diff: 5/9.9672
 -  Step-by-step instructions for solving  Puzzle 168, (34/49)   Diff: 6/75.9652
 -  Step-by-step instructions for solving  Puzzle 169, (34/49)   Diff: 6/58.7653
 -  Step-by-step instructions for solving  Puzzle 170, (34/49)   Diff: 6/44.6891
 -  Step-by-step instructions for solving  Puzzle 171, (35/49)   Diff: 6/96.5582
 -  Step-by-step instructions for solving  Puzzle 172, (35/49)   Diff: 6/54.6972
 -  Step-by-step instructions for solving  Puzzle 173, (36/49)   Diff: 6/77.8752
 -  Step-by-step instructions for solving  Puzzle 174, (36/49)   Diff: 6/44.9676
 -  Step-by-step instructions for solving  Puzzle 175, (38/49)   Diff: 6/66.4895
 -  Step-by-step instructions for solving  Puzzle 176, (38/49)   Diff: 6/35.8895