Variations on Tournament Sudoku-by5 Logic Puzzles (Vol 1) 
 Chapter 4: Eight Tournament Sudoku-Xtreme Puzzles (numbers 9-16) 
 
-  Step-by-step instructions for solving  Puzzle 9, (263/369)   Diff: 21/9.9999.9999.997A.2299.9993
 -  Step-by-step instructions for solving  Puzzle 10, (271/369)   Diff: 21/9.9999.9999.9999.95B2.3761
 -  Step-by-step instructions for solving  Puzzle 11, (275/369)   Diff: 26/99.9994.5899.9999.9736.8999.9973
 -  Step-by-step instructions for solving  Puzzle 12, (261/369)   Diff: 27/999.9999.9999.9999.A111.1236.9745
 -  Step-by-step instructions for solving  Puzzle 13, (285/369)   Diff: 27/995.7889.9999.9983.9998.4869.9971
 -  Step-by-step instructions for solving  Puzzle 14, (279/369)   Diff: 28/9999.9999.9857.9999.4249.9999.6342
 -  Step-by-step instructions for solving  Puzzle 15, (282/369)   Diff: 29/9.9999.9957.6999.9999.4212.2234.4656
 -  Step-by-step instructions for solving  Puzzle 16, (293/369)   Diff: 29/9.7999.9997.9999.9999.321D.5799.9992