Difficult Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 24: Two Difficult (DiffLev 11-14) Discoverably Puzzles (numbers 127-128) 
 
-  Step-by-step instructions for solving  Puzzle 127, (91/144)   Diff: 11/998.9956.7962
 -  Step-by-step instructions for solving  Puzzle 128, (84/144)   Diff: 14/99.441B.2669.9432