Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 29: Two Tournament (DiffLev 25-28) Goldsmithery Puzzles (numbers 137-138) 
 
-  Step-by-step instructions for solving  Puzzle 137, (97/144)   Diff: 25/9.6442.4121.1221.3311.1469.9765
 -  Step-by-step instructions for solving  Puzzle 138, (102/144)   Diff: 28/7432.3132.6425.2224.5212.1225.9971