Challenging Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 17: Two Challenging (DiffLev 15-18) Ambidextrous Puzzles (numbers 113-114) 
 
-  Step-by-step instructions for solving  Puzzle 113, (88/144)   Diff: 15/654.6465.5156.6699
 -  Step-by-step instructions for solving  Puzzle 114, (91/144)   Diff: 18/64.4348.2122.6587.7985