Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 31: Two Tournament (DiffLev 22-29) Hyperstoical Puzzles (numbers 141-142) 
 
-  Step-by-step instructions for solving  Puzzle 141, (91/144)   Diff: 22/91.1123.3522.2B56.6688.4564
 -  Step-by-step instructions for solving  Puzzle 142, (94/144)   Diff: 29/6.1AA4.4112.2422.3231.A212.5654.6992