Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 55: Eight Medium Sudoku-8up Puzzles (numbers 317-324) 
 
-  Step-by-step instructions for solving  Puzzle 317, (33/64)   Diff: 5/9.6664
 -  Step-by-step instructions for solving  Puzzle 318, (33/64)   Diff: 6/96.6822
 -  Step-by-step instructions for solving  Puzzle 319, (42/64)   Diff: 7/766.8951
 -  Step-by-step instructions for solving  Puzzle 320, (39/64)   Diff: 8/9624.4542
 -  Step-by-step instructions for solving  Puzzle 321, (39/64)   Diff: 8/8423.6754
 -  Step-by-step instructions for solving  Puzzle 322, (40/64)   Diff: 8/7356.3457
 -  Step-by-step instructions for solving  Puzzle 323, (40/64)   Diff: 8/6554.4862
 -  Step-by-step instructions for solving  Puzzle 324, (45/64)   Diff: 8/7364.4993