Selected studies composed by

the three sisters Polgar.

Hungary

Susan 1969

Sofia 1974

Judit 1976

From left to right: Judit, Sofia and Susan.

From left to right: Sofia, Susan and Judit. (2008).

All three are very strong chessplayers with FIDE titles.

There is a lot of information about them on Internet like Wikipedia:

https://en.wikipedia.org/wiki/Susan_Polgar

https://en.wikipedia.org/wiki/Sofia_Polgar

https://en.wikipedia.org/wiki/Judit_Polg%C3%A1r

They created also a few endgame studies:

In the following study there is side soltion found by Vladimir Samilo.

But he made a correction too !

A better starting position: