Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 42: Two Tournament (DiffLev 23-29) Productively Puzzles (numbers 163-164) 
 
-  Step-by-step instructions for solving  Puzzle 163, (93/144)   Diff: 23/984.22CB.2443.4446.6334.4462
 -  Step-by-step instructions for solving  Puzzle 164, (103/144)   Diff: 29/7.1122.2433.4213.2313.3657.9635.5342