5 Golden SUDOKU - Champion level - Very hard - Vol. 28
50 Not five not ten - "X" Diagonal - Central Points + 50 Killer "X" Diagonal Octagonal Star + 50 Puzzles 3 Numbers "X" Diagonal - Anti-Knight + 50 Even - Odd Puzzles "X" Diagonal + 50 Threelinesdoku sudoku. This is excellent sudoku for you.
