Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 10: Eight Medium Sudoku-7B Puzzles (numbers 41-48) 
 
-  Step-by-step instructions for solving  Puzzle 41, (28/49)   Diff: 5/8.8651
 -  Step-by-step instructions for solving  Puzzle 42, (30/49)   Diff: 5/9.9541
 -  Step-by-step instructions for solving  Puzzle 43, (34/49)   Diff: 5/8.8954
 -  Step-by-step instructions for solving  Puzzle 44, (32/49)   Diff: 6/77.9522
 -  Step-by-step instructions for solving  Puzzle 45, (32/49)   Diff: 6/77.8442
 -  Step-by-step instructions for solving  Puzzle 46, (38/49)   Diff: 6/67.8764
 -  Step-by-step instructions for solving  Puzzle 47, (34/49)   Diff: 8/4114.3794
 -  Step-by-step instructions for solving  Puzzle 48, (36/49)   Diff: 8/2224.8882