Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 42: Eight Challenging Sudoku-8 Puzzles (numbers 237-244) 
 
-  Step-by-step instructions for solving  Puzzle 237, (44/64)   Diff: 14/55.6421.111B.2473
 -  Step-by-step instructions for solving  Puzzle 238, (44/64)   Diff: 14/31.2B22.3234.5645
 -  Step-by-step instructions for solving  Puzzle 239, (45/64)   Diff: 14/31.B221.2544.4672
 -  Step-by-step instructions for solving  Puzzle 240, (44/64)   Diff: 15/311.B221.C224.7851
 -  Step-by-step instructions for solving  Puzzle 241, (45/64)   Diff: 15/643.4112.1112.2782
 -  Step-by-step instructions for solving  Puzzle 242, (47/64)   Diff: 15/841.1123.4323.2463
 -  Step-by-step instructions for solving  Puzzle 243, (45/64)   Diff: 16/5211.1112.3444.4453
 -  Step-by-step instructions for solving  Puzzle 244, (45/64)   Diff: 16/4211.A1A2.1346.7641