SOLVE The 3x3 Magic Square Completely - There Can Only Be One!

A magic square has every row, column, and diagonal sum to the same number. How many magic squares are there using the numbers 1 to 9?

This video shows you all the possibilities and proves there are no others, leading to the surprising result the 3x3 magic square is essentially unique, up to symmetries of a square.

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Relevant Math Stack Exchange
http://math.stackexchange.com/questions/636633/how-to-prove-that-a-3-times-3-magic-square-must-have-5-in-its-middle-cell

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