Challenging Sudoku Eight Logic Puzzles (Vol 1) 
 Chapter 6: Sixteen Challenging (DiffLev 14) Sudoku-8-X Puzzles (numbers 47-62) 
 
-  Step-by-step instructions for solving  Puzzle 47, (47/64)   Diff: 14/44.2A23.2331.4774
 -  Step-by-step instructions for solving  Puzzle 48, (47/64)   Diff: 14/21.2353.1123.4983
 -  Step-by-step instructions for solving  Puzzle 49, (48/64)   Diff: 14/42.B412.2423.2497
 -  Step-by-step instructions for solving  Puzzle 50, (48/64)   Diff: 14/41.A331.A144.4984
 -  Step-by-step instructions for solving  Puzzle 51, (48/64)   Diff: 14/34.7342.2122.5544
 -  Step-by-step instructions for solving  Puzzle 52, (48/64)   Diff: 14/34.4511.1234.4772
 -  Step-by-step instructions for solving  Puzzle 53, (48/64)   Diff: 14/33.1311.1A13.7995
 -  Step-by-step instructions for solving  Puzzle 54, (48/64)   Diff: 14/32.2A11.2244.7981
 -  Step-by-step instructions for solving  Puzzle 55, (48/64)   Diff: 14/24.211A.B244.9772
 -  Step-by-step instructions for solving  Puzzle 56, (49/64)   Diff: 14/34.3424.3323.3564
 -  Step-by-step instructions for solving  Puzzle 57, (49/64)   Diff: 14/33.4221.2444.4268
 -  Step-by-step instructions for solving  Puzzle 58, (49/64)   Diff: 14/22.4421.4236.6643
 -  Step-by-step instructions for solving  Puzzle 59, (49/64)   Diff: 14/1A.1143.2445.7673
 -  Step-by-step instructions for solving  Puzzle 60, (50/64)   Diff: 14/33.3222.3312.4769
 -  Step-by-step instructions for solving  Puzzle 61, (50/64)   Diff: 14/33.2135.3112.5768
 -  Step-by-step instructions for solving  Puzzle 62, (50/64)   Diff: 14/22.3423.4344.6544