You plan an attack after you develop. But moving your pieces from backrank doesnt always mean you developed them. anyway.
My opponent hasn't developed much pieces. How do I turn that into an advantage?

Study Morphy's games. He mastered punishing players who failed to develop their pieces.
Thanks

Study Morphy's games. He mastered punishing players who failed to develop their pieces.
hang on Morphy who

Study Morphy's games. He mastered punishing players who failed to develop their pieces.
hang on Morphy who
Morphy, Paul. Lived in New Orleans. Beat the best players in Europe in 1858-1859.
https://www.chessgames.com/perl/chessplayer?pid=16002
Say, in a hypothetical, I have most of my pieces off the back rank while my opponent spent seven moves moving his knight around. How would I make use of that?