Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 30: Two Tournament (DiffLev 24-27) Headstrongly Puzzles (numbers 139-140) 
 
-  Step-by-step instructions for solving  Puzzle 139, (100/144)   Diff: 24/9556.4434.4233.3331.1254.7665
 -  Step-by-step instructions for solving  Puzzle 140, (97/144)   Diff: 27/412.1A33.3444.5663.1211.3476.6466