The Saavedra position is one of the best known chess endgame studies. It is named after the Spanish priest Rev. Fernando Saavedra (1849–1922), who, while living in Glasgow in the late 19th century, spotted a win in a position previously thought to have been a draw (Wikipedia).
“In order to improve your game, you must study the endgame before
everything else, for whereas the endings can be studied and
mastered by themselves, the middle game and the opening
must be studied in relation to the endgame”
(Jose Raul Capablanca).