Variations on Advanced Sudoku Logic Puzzles (Vol 1) 
 Chapter 44: Two TournamentPlus HyperSudoku-15 Puzzles (numbers 147-148) 
 
-  Step-by-step instructions for solving  Puzzle 147, (148/225)   Diff: 33/9.6123.2424.7322.2793.221A.1A12.3786.9976
 -  Step-by-step instructions for solving  Puzzle 148, (155/225)   Diff: 43/652.2221.1255.441B.2455.8764.3221.C355.311B+