Jed Pittman

For more than a year now, I have been a huge fan of sudoku. Granted, I got on the bandwagon a little bit late, but I think that they are quite fun. Usually, I will do them on the train on my way to or from work. And it seems there can’t be a paper or magazine published these days without including a sudoku.

Here are some interesting facts about sudoku that you probably didn’t know. I know I didn’t.

In order for a sudoku to be proper - it must contain at least 17 starting digits. A proper sudoku (one with only one solution) has not been discovered that has 16 or fewer starting digits.

Sudoku are a special kind of Latin Square.

There are over 3.5 trillion unique sudokus.

This is the interesting article about sudoku graph theory where I learned all of this.

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