Sudoku, interesting trivia ;-)

I have been studying the I Ching and other Chinese classics and just the other day I purchased a Sudoku book for my wife and noticed a similarity which got me to wonder, where did the sodoku idea originate.

The following graphic shows a sudoku puzzle and the other is the "magic square" in the I Ching, interesting!

Click for larger view!

Soduko: has nine magic squares within a larger magic square!
Magic square: has nine squares with the same numbers found in the sudoku puzzles smaller squares, etc.