Medium Sudoku Five Logic Puzzles (Vol 1) 
 Chapter 18: Ten Medium (DiffLev 8) Sudoku-5C Puzzles (numbers 181-190) 
 
-  Step-by-step instructions for solving  Puzzle 181, (19/25)   Diff: 8/2131.1344
 -  Step-by-step instructions for solving  Puzzle 182, (20/25)   Diff: 8/2222.2343
 -  Step-by-step instructions for solving  Puzzle 183, (20/25)   Diff: 8/2213.2352
 -  Step-by-step instructions for solving  Puzzle 184, (20/25)   Diff: 8/2123.4242
 -  Step-by-step instructions for solving  Puzzle 185, (20/25)   Diff: 8/211A.2346
 -  Step-by-step instructions for solving  Puzzle 186, (20/25)   Diff: 8/1232.2334
 -  Step-by-step instructions for solving  Puzzle 187, (20/25)   Diff: 8/1221.3335
 -  Step-by-step instructions for solving  Puzzle 188, (20/25)   Diff: 8/1122.4442
 -  Step-by-step instructions for solving  Puzzle 189, (21/25)   Diff: 8/2221.4235
 -  Step-by-step instructions for solving  Puzzle 190, (21/25)   Diff: 8/1242.2442