Variations on Intermediate Sudoku Logic Puzzles (Vol 1) 
 Chapter 57: Eight Challenging Sudoku-8up Puzzles (numbers 333-340) 
 
-  Step-by-step instructions for solving  Puzzle 333, (44/64)   Diff: 13/2.2444.4425.3532
 -  Step-by-step instructions for solving  Puzzle 334, (42/64)   Diff: 14/52.1211.A434.8343
 -  Step-by-step instructions for solving  Puzzle 335, (45/64)   Diff: 14/62.1334.3213.5741
 -  Step-by-step instructions for solving  Puzzle 336, (45/64)   Diff: 14/56.241A.1123.4564
 -  Step-by-step instructions for solving  Puzzle 337, (45/64)   Diff: 14/53.1B12.2124.7564
 -  Step-by-step instructions for solving  Puzzle 338, (42/64)   Diff: 15/323.21C3.3323.3353
 -  Step-by-step instructions for solving  Puzzle 339, (44/64)   Diff: 15/733.322B.2412.3352
 -  Step-by-step instructions for solving  Puzzle 340, (45/64)   Diff: 15/443.2211.1223.5654