Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 39: Two Tournament (DiffLev 27) Overmatching Puzzles (numbers 157-158) 
 
-  Step-by-step instructions for solving  Puzzle 157, (94/144)   Diff: 27/654.311A.2443.1111.1226.9447.6662
 -  Step-by-step instructions for solving  Puzzle 158, (98/144)   Diff: 27/855.2211.2121.1556.6795.5412.2341