Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 6: Twelve Medium (DiffLev 8) Sudoku-5 Puzzles (numbers 37-48) 
 
-  Step-by-step instructions for solving  Puzzle 37, (18/25)   Diff: 8/2111.3532
 -  Step-by-step instructions for solving  Puzzle 38, (19/25)   Diff: 8/4111.3441
 -  Step-by-step instructions for solving  Puzzle 39, (19/25)   Diff: 8/2113.2352
 -  Step-by-step instructions for solving  Puzzle 40, (19/25)   Diff: 8/1122.3451
 -  Step-by-step instructions for solving  Puzzle 41, (19/25)   Diff: 8/1112.3443
 -  Step-by-step instructions for solving  Puzzle 42, (20/25)   Diff: 8/4222.1351
 -  Step-by-step instructions for solving  Puzzle 43, (20/25)   Diff: 8/3231.1361
 -  Step-by-step instructions for solving  Puzzle 44, (20/25)   Diff: 8/2223.2342
 -  Step-by-step instructions for solving  Puzzle 45, (20/25)   Diff: 8/2222.1353
 -  Step-by-step instructions for solving  Puzzle 46, (20/25)   Diff: 8/2212.3244
 -  Step-by-step instructions for solving  Puzzle 47, (20/25)   Diff: 8/1242.1361
 -  Step-by-step instructions for solving  Puzzle 48, (21/25)   Diff: 8/3322.1235