Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 40: Two Tournament (DiffLev 26-29) Overstudying Puzzles (numbers 159-160) 
 
-  Step-by-step instructions for solving  Puzzle 159, (93/144)   Diff: 26/97.5444.2113.1B11.1233.3243.7872
 -  Step-by-step instructions for solving  Puzzle 160, (95/144)   Diff: 29/5.4AA1.11A1.1224.1A23.4333.7756.9573