I started playing chess a month ago and sometimes I would like to play a hard computer from a particular position (e.g., practicing not blundering in openings, or practice winning a won endgame position). However, it doesn't seem like there is a way on the Chess.com app to load a PGN and play against a particular bot. Obviously if I start a game against a 3200 bot then I won't be able to reach the part of the game I want to practice in.
Is there a way to do what I describe in Chess.com or perhaps another website/app?