Difficult Sudoku Eight Logic Puzzles (Vol 1) 
 Chapter 8: Sixteen Difficult (DiffLev 11-12) HyperSudoku-8 Puzzles (numbers 79-94) 
 
-  Step-by-step instructions for solving  Puzzle 79, (42/64)   Diff: 11/643.2144.3564
 -  Step-by-step instructions for solving  Puzzle 80, (43/64)   Diff: 11/676.3331.2354
 -  Step-by-step instructions for solving  Puzzle 81, (44/64)   Diff: 11/443.2133.6567
 -  Step-by-step instructions for solving  Puzzle 82, (45/64)   Diff: 11/342.3464.7543
 -  Step-by-step instructions for solving  Puzzle 83, (46/64)   Diff: 11/666.3573.2152
 -  Step-by-step instructions for solving  Puzzle 84, (47/64)   Diff: 11/724.2447.5462
 -  Step-by-step instructions for solving  Puzzle 85, (47/64)   Diff: 11/425.4755.4632
 -  Step-by-step instructions for solving  Puzzle 86, (42/64)   Diff: 12/8643.2313.5331
 -  Step-by-step instructions for solving  Puzzle 87, (42/64)   Diff: 12/5111.1533.4567
 -  Step-by-step instructions for solving  Puzzle 88, (46/64)   Diff: 12/5544.5232.6244
 -  Step-by-step instructions for solving  Puzzle 89, (46/64)   Diff: 12/5322.4444.4365
 -  Step-by-step instructions for solving  Puzzle 90, (47/64)   Diff: 12/7523.21B3.6763
 -  Step-by-step instructions for solving  Puzzle 91, (47/64)   Diff: 12/5533.4232.4862
 -  Step-by-step instructions for solving  Puzzle 92, (47/64)   Diff: 12/3578.3212.3652
 -  Step-by-step instructions for solving  Puzzle 93, (47/64)   Diff: 12/3232.2235.7954
 -  Step-by-step instructions for solving  Puzzle 94, (48/64)   Diff: 12/6522.21D3.5774