Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 37: Eight Challenging Sudoku-7D Puzzles (numbers 205-212) 
 
-  Step-by-step instructions for solving  Puzzle 205, (39/49)   Diff: 13/4.3123.2332.5443
 -  Step-by-step instructions for solving  Puzzle 206, (37/49)   Diff: 14/51.1131.3333.1381
 -  Step-by-step instructions for solving  Puzzle 207, (38/49)   Diff: 14/22.312B.2212.5761
 -  Step-by-step instructions for solving  Puzzle 208, (38/49)   Diff: 14/22.2112.3411.1692
 -  Step-by-step instructions for solving  Puzzle 209, (39/49)   Diff: 14/12.11A1.3424.5572
 -  Step-by-step instructions for solving  Puzzle 210, (40/49)   Diff: 14/33.2211.2322.4762
 -  Step-by-step instructions for solving  Puzzle 211, (40/49)   Diff: 14/21.4421.2212.4852
 -  Step-by-step instructions for solving  Puzzle 212, (41/49)   Diff: 14/22.2233.2225.6541