Challenging Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 37: Two Challenging (DiffLev 17-20) Outfieldsman Puzzles (numbers 153-154) 
 
-  Step-by-step instructions for solving  Puzzle 153, (90/144)   Diff: 17/9.9623.3424.2246.5972
 -  Step-by-step instructions for solving  Puzzle 154, (94/144)   Diff: 20/9523.3112.1345.8699.9444