I made a square! How rare is a square?

https://lichess.org/avcruYcT/white#33

Not very much

It is rare, congratulations!
I recall a game at the Zurich 1953 candidates with a square. That wasn't the centre, so yours is more impressive.

It is rare, congratulations! I recall a game at the Zurich 1953 candidates with a square. That wasn't the centre, so yours is more impressive.

Thank you for your analysis!

@Bishop1964 Thank you for your analysis!

Here is a famous position.
Both 14...d5 and 14...a5 have been played and lead to a pawn square.

https://lichess.org/lok90PrB#27

Here is a famous position. Both 14...d5 and 14...a5 have been played and lead to a pawn square. https://lichess.org/lok90PrB#27

You guys are so good.