Information and Step-by-Step Instructions for Difficult Sudoku-by5 Logic Puzzles (Vol 1)

Group Puzzles (Sudoku Generalized) Difficult Sudoku-by5 Logic Puzzles, Volume 1.

Teaching Logic using Group Puzzles
- What Exactly are Group Puzzles?
- Naming New Group Puzzle Types
Solving Group Logic Puzzles
- Puzzle Difficultly Levels Explained
- Detailed instructions for working a type 'Sudoku-by5' group puzzle
Sixteen Difficult (DiffLev 9) Sudoku-by5 Puzzles (numbers 1-16)
Sixteen Difficult (DiffLev 10) Sudoku-by5 Puzzles (numbers 17-32)
Sixteen Difficult (DiffLev 11) Sudoku-by5 Puzzles (numbers 33-48)
Sixteen Difficult (DiffLev 12) Sudoku-by5 Puzzles (numbers 49-64)
Sixteen Difficult (DiffLev 13) Sudoku-by5 Puzzles (numbers 65-80)
Twenty Difficult (DiffLev 14) Sudoku-by5 Puzzles (numbers 81-100)