Challenging Sudoku Seven Logic Puzzles (Vol 1) 
 Chapter 12: Fourteen Challenging (DiffLev 14) Sudoku-7C Puzzles (numbers 123-136) 
 
-  Step-by-step instructions for solving  Puzzle 123, (35/49)   Diff: 14/25.4211.1332.2441
 -  Step-by-step instructions for solving  Puzzle 124, (35/49)   Diff: 14/11.1213.2123.4563
 -  Step-by-step instructions for solving  Puzzle 125, (36/49)   Diff: 14/12.2112.3211.3773
 -  Step-by-step instructions for solving  Puzzle 126, (37/49)   Diff: 14/3A.A121.2222.2594
 -  Step-by-step instructions for solving  Puzzle 127, (37/49)   Diff: 14/21.1A12.3225.6344
 -  Step-by-step instructions for solving  Puzzle 128, (37/49)   Diff: 14/13.2331.2115.6243
 -  Step-by-step instructions for solving  Puzzle 129, (38/49)   Diff: 14/73.1112.1221.3554
 -  Step-by-step instructions for solving  Puzzle 130, (38/49)   Diff: 14/33.2322.3231.1481
 -  Step-by-step instructions for solving  Puzzle 131, (38/49)   Diff: 14/33.2211.1113.4583
 -  Step-by-step instructions for solving  Puzzle 132, (38/49)   Diff: 14/22.431A.1122.2665
 -  Step-by-step instructions for solving  Puzzle 133, (38/49)   Diff: 14/21.2222.1452.4344
 -  Step-by-step instructions for solving  Puzzle 134, (39/49)   Diff: 14/42.2121.2422.2492
 -  Step-by-step instructions for solving  Puzzle 135, (39/49)   Diff: 14/34.2122.1223.3374
 -  Step-by-step instructions for solving  Puzzle 136, (39/49)   Diff: 14/31.1212.2224.4672