Challenging Sudoku Eight Logic Puzzles (Vol 1) 
 Chapter 13: Sixteen Challenging (DiffLev 13) SuperSudoku-8 Puzzles (numbers 159-174) 
 
-  Step-by-step instructions for solving  Puzzle 159, (44/64)   Diff: 13/6.1B11.3244.2792
 -  Step-by-step instructions for solving  Puzzle 160, (44/64)   Diff: 13/5.4211.A312.4866
 -  Step-by-step instructions for solving  Puzzle 161, (45/64)   Diff: 13/7.5212.4444.2244
 -  Step-by-step instructions for solving  Puzzle 162, (45/64)   Diff: 13/3.311A.2223.4599
 -  Step-by-step instructions for solving  Puzzle 163, (46/64)   Diff: 13/7.6563.1112.5342
 -  Step-by-step instructions for solving  Puzzle 164, (46/64)   Diff: 13/7.5133.6423.3432
 -  Step-by-step instructions for solving  Puzzle 165, (46/64)   Diff: 13/5.4113.2245.8452
 -  Step-by-step instructions for solving  Puzzle 166, (46/64)   Diff: 13/4.5333.1234.4554
 -  Step-by-step instructions for solving  Puzzle 167, (46/64)   Diff: 13/4.2255.1234.3663
 -  Step-by-step instructions for solving  Puzzle 168, (46/64)   Diff: 13/3.1224.3411.2697
 -  Step-by-step instructions for solving  Puzzle 169, (46/64)   Diff: 13/2.21A1.1249.6673
 -  Step-by-step instructions for solving  Puzzle 170, (47/64)   Diff: 13/7.4232.2322.4664
 -  Step-by-step instructions for solving  Puzzle 171, (47/64)   Diff: 13/7.2211.1245.9355
 -  Step-by-step instructions for solving  Puzzle 172, (47/64)   Diff: 13/6.5443.2214.4345
 -  Step-by-step instructions for solving  Puzzle 173, (47/64)   Diff: 13/6.2112.5556.3533
 -  Step-by-step instructions for solving  Puzzle 174, (47/64)   Diff: 13/4.5312.5353.5542