down the exchange in chess

Lauren here!
Sometimes you will loose the exchange (e.g: you loose your rook for a knight) for nothing when you play chess.
Even if you are down the exchange, never resign because the game is not over. You still have a slight chance to draw or even win the game.
This has happened to me a couple times. I was down a rook for a knight. (Remember, rooks are generally stronger than knights.) I remember I kept on playing and I ended up drawing the one of the games..
The game is not over when it's not over!