Challenging Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 11: Six Challenging (DiffLev 16-17) tpsmith-silly Puzzles (numbers 85-90) 
 
-  Step-by-step instructions for solving  Puzzle 85, (87/144)   Diff: 16/9984.2133.3359.6855
 -  Step-by-step instructions for solving  Puzzle 86, (94/144)   Diff: 16/9856.3548.5664.4784
 -  Step-by-step instructions for solving  Puzzle 87, (94/144)   Diff: 16/9545.5745.4465.6993
 -  Step-by-step instructions for solving  Puzzle 88, (98/144)   Diff: 16/9545.2443.4589.9972
 -  Step-by-step instructions for solving  Puzzle 89, (102/144)   Diff: 16/9764.7524.6555.6996
 -  Step-by-step instructions for solving  Puzzle 90, (96/144)   Diff: 17/9.9821.221A.1245.6998