Yes, Sudoku is still popular. Yes, countless Sudoku versions already exist.

But even though it just adds up to the pile, Sudoku Solitaire really does sound better than the original for one simple reason: no erasing.

With the regular paper-based game, unless they can solve it in their mind, people have to write, then erase, then write some more. Add a pen in the equation and you get a big mess.

The Solitaire solves this with numbered tiles and interchangeable inserts: instead of jotting the figures down, all you have to do is move the tiles in the appropriate configuration.

And it’s actually 2 games in 1: in addition to Sudoku, it also comes with inserts for the other popular math game, Kakuro.

How much under $29.99?
Some: $12.87 on Amazon.com.

Via bookofjoe