Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 19: Two Tournament (DiffLev 23-28) Columnarized Puzzles (numbers 117-118) 
 
-  Step-by-step instructions for solving  Puzzle 117, (94/144)   Diff: 23/81B.1342.2111.2352.3488.9992
 -  Step-by-step instructions for solving  Puzzle 118, (96/144)   Diff: 28/6852.21B4.2211.3235.5423.3223.3793