How to gain material by trading pieces? So, I am learning the basics on trading pieces, but can someone please give me tips on the "Art of trading pieces with material gain".

I know a concept called overloading, but are there any other tactical concepts?
Substitution would be another. With a trade/capture, you can set up another tactical motive like a skewer or a fork.

In the position below (taken from the ChessTactics link above), Black wins an exchange with the following combination:

[Title "Black to move"]
[StartFlipped "1"]
[FEN "2r2rk1/p1p1qp1p/1p2n1pb/8/n7/1PB1PBN1/P2Q1PPP/R4RK1 b - - 0 33"]

1... Nxc3 2. Qxc3 Bg7