What is a 3x3 magic square?

A 3x3 magic square is a grid containing the numbers 1 to 9 arranged such that the sum of each row, column, and both main diagonals equals the same constant, known as the magic constant, which is 15 for a 3x3 square. Each number must be used exactly once, and the arrangement creates a unique pattern of numbers. The most famous example is the square formed by the following arrangement:

<code>8 1 6
3 5 7 4 9 2
</code>

This configuration satisfies the magic square conditions.