Tournament Sudoku Twelve Logic Puzzles (Vol 1) 
 Chapter 7: Twelve Tournament (DiffLev 21-25) HyperSudoku-12 Puzzles (numbers 49-60) 
 
-  Step-by-step instructions for solving  Puzzle 49, (101/144)   Diff: 21/9.8324.5521.1244.4677.4974
 -  Step-by-step instructions for solving  Puzzle 50, (102/144)   Diff: 21/9.4563.4524.3443.7747.5871
 -  Step-by-step instructions for solving  Puzzle 51, (90/144)   Diff: 24/9741.A122.31B1.2A13.5777.7541
 -  Step-by-step instructions for solving  Puzzle 52, (99/144)   Diff: 24/9545.5752.2A1A.1111.A233.8994
 -  Step-by-step instructions for solving  Puzzle 53, (103/144)   Diff: 24/7521.41A2.3421.4995.3547.8852
 -  Step-by-step instructions for solving  Puzzle 54, (105/144)   Diff: 24/9653.2311.A225.4411.1569.9941
 -  Step-by-step instructions for solving  Puzzle 55, (107/144)   Diff: 24/6544.2353.2554.4242.2544.9991
 -  Step-by-step instructions for solving  Puzzle 56, (104/144)   Diff: 25/7.4455.33B1.1113.6625.8635.2794
 -  Step-by-step instructions for solving  Puzzle 57, (104/144)   Diff: 25/5.1121.A243.4512.3235.6488.9964
 -  Step-by-step instructions for solving  Puzzle 58, (106/144)   Diff: 25/8.8421.2111.1B11.2346.2489.9991
 -  Step-by-step instructions for solving  Puzzle 59, (107/144)   Diff: 25/9.9955.1111.2221.1B13.4347.7792
 -  Step-by-step instructions for solving  Puzzle 60, (107/144)   Diff: 25/3.2483.5572.3342.2349.5356.5662