Group Puzzles (Sudoku Generalized) Tournament Sudoku Logic Puzzles, Volume 1.
  1. Teaching Logic using Group Puzzles
  2. Solving Group Logic Puzzles
  3. Forty-Five Tournament (DiffLev 21-22) Sudoku Puzzles (numbers 1-45)
  4. Forty-Five Tournament (DiffLev 23-24) Sudoku Puzzles (numbers 46-90)
  5. Forty-Five Tournament (DiffLev 24-25) Sudoku Puzzles (numbers 91-135)
  6. Forty-Five Tournament (DiffLev 26-29) Sudoku Puzzles (numbers 136-180)