Difficult Sudoku Eight Logic Puzzles (Vol 1) 
 Chapter 14: Sixteen Difficult (DiffLev 11-12) SuperSudoku-8 Puzzles (numbers 175-190) 
 
-  Step-by-step instructions for solving  Puzzle 175, (45/64)   Diff: 11/763.1114.6664
 -  Step-by-step instructions for solving  Puzzle 176, (46/64)   Diff: 11/885.2212.3483
 -  Step-by-step instructions for solving  Puzzle 177, (46/64)   Diff: 11/824.52C5.4742
 -  Step-by-step instructions for solving  Puzzle 178, (46/64)   Diff: 11/413.7433.5853
 -  Step-by-step instructions for solving  Puzzle 179, (46/64)   Diff: 11/113.3369.9434
 -  Step-by-step instructions for solving  Puzzle 180, (49/64)   Diff: 11/259.6323.4553
 -  Step-by-step instructions for solving  Puzzle 181, (41/64)   Diff: 12/5A12.4533.6362
 -  Step-by-step instructions for solving  Puzzle 182, (44/64)   Diff: 12/3333.3234.4664
 -  Step-by-step instructions for solving  Puzzle 183, (47/64)   Diff: 12/9743.4332.2244
 -  Step-by-step instructions for solving  Puzzle 184, (47/64)   Diff: 12/7634.4413.3543
 -  Step-by-step instructions for solving  Puzzle 185, (47/64)   Diff: 12/6323.6522.5652
 -  Step-by-step instructions for solving  Puzzle 186, (47/64)   Diff: 12/5644.3133.5544
 -  Step-by-step instructions for solving  Puzzle 187, (47/64)   Diff: 12/3355.3433.6543
 -  Step-by-step instructions for solving  Puzzle 188, (47/64)   Diff: 12/3344.3663.3444
 -  Step-by-step instructions for solving  Puzzle 189, (48/64)   Diff: 12/5463.1212.6963
 -  Step-by-step instructions for solving  Puzzle 190, (48/64)   Diff: 12/3123.2338.7691