Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 47: Two Tournament (DiffLev 28-29) Supernotably Puzzles (numbers 173-174) 
 
-  Step-by-step instructions for solving  Puzzle 173, (89/144)   Diff: 28/8A12.1222.222A.3234.3112.4794.4643
 -  Step-by-step instructions for solving  Puzzle 174, (97/144)   Diff: 29/7.7313.5453.2112.3123.3311.3344.6691