Questions Regarding Exchange Sacrifice

MrChessStrategy edited

I am black, and on move 18, I am not suppose to move the a8 rook and instead should play Re8, I therefore wonder when I should give up a rook for a piece. Any expert advices?

https://lichess.org/game/0yYYTyHq/black

I am black, and on move 18, I am not suppose to move the a8 rook and instead should play Re8, I therefore wonder when I should give up a rook for a piece. Any expert advices? https://lichess.org/game/0yYYTyHq/black

tpr

A fianchetto bishop Bg2 is often wort a rook Ra8.