There are some opening lines where grabbing material is very dangerous – another question of mine serves as a good example.
However, are there some trick lines where the only reasonable choice is to grab extra material leading to a game playable for the player offering material? At first some gambits come to mind where one has to take a pawn first, but rather often gives it back quite soon.
I hope there exist a lot of examples, and maybe this question will see a lot of great answers then. To specify the question, I am searching for opening ideas where:
- In a position which is roughly equal, one side (player A) sacrifices a lot of material – more than a pawn, the more the better.
- The other side (player B) has to take that material in order not to get a worse position.
- After B grabs that material, A gets a playable position. (That does not mean sacrificing material had to be the best move available.)
- Ideally these lines occur rather often in actual games. Such a trick on move 24 in an opening no one plays is of course less interesting.