I am not that intuitive math genius! But I gave the 2011 version to a friend who is and who has worked Sudoku puzzles since they appeared. She liked it so well she's getting this edition for Christmas.
Update: I didn't get to see this friend before she left for vacation. When I saw her about a week into the New Year, she was literally anxious to discover whether I'd gotten her the 2012 edition. And happy to discover that I had.