Are there any gambits involving sacrificing a piece? My impression of the word &quot;gambit&quot; is the sacrifice of a pawn or several pawns at the opening stage of a chess game. However, based on the definition on Wikipedia, a gambit (from ancient Italian gambetto, meaning &quot;to trip&quot;) is a chess opening in which a player, more often White, sacrifices material, usually a pawn, with the hope of achieving a resulting advantageous position.
The phrase &quot;usually a pawn&quot; seems to imply that a gambit could be a sacrifice of other pieces. Am wondering what are examples of gambits that sacrifice a knight, or a bishop, or a rook, or even the queen, or a combination of these pieces?
I am not talking about blunders at the opening stage that cause loss of material. I am asking about openings that stand the test of time where one side willfully sacrifices some material other than pawns to earn some advantage.
A related question: What is the &quot;biggest&quot; gambit that is still being played at the master's or above level? That is, a gambit that white sacrifices a combination of biggest value of pieces and yet obtained enough advantage development and/or space; at the same time, the game is somewhat acceptable for black as well.
This is kind of out there (virtually nobody plays it as white and even fewer allow it as black) but there is a rather crazy queen sacrifice line in the Grand Prix:

[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1 "]
1.e4 c5 2.f4 d5 3.Nf3 dxe4 4.Ng5 Nf6 5.Bc4 Bg4!? 6.Bxf7+ Kd7 7.Qxg4+ Nxg4 8.Be6+ Kc6 9.Bxg4


5...Bg4!? by black is quite rare and combative, inviting (daring) white to initiate the festivities where 5...e6 instead is calmer. So white takes it up and sacrifices the queen for just two minors and the hope of long-term play against black's lack of development. Yes, there isn't any quick tactical win, just long-term pressure while down a queen.

The position has occurred several times in master play (check the lichess database) but is extremely rare, and most examples not recent. It was even featured on chessgames.com many years back: http://www.chessgames.com/perl/chessgame?gid=1648780