If you want to overrun your opponent because you think he cannot
defend well or plays too passive, then try the Evans Gambit. This might
really upset him.
The opening chess moves of the Evans Gambit are very active. It originates from Kapitän Evans (1824) and belongs to the open games.
Bobby Fischer and Garri Kasparow played this opening a few times and it is considered playable, but not often played among grandmasters. Sometimes improvements for this chess opening are found and there is no reason why it should not be played.
However, you should play it only if you know it well and prefer tactical rich chess positions and if you are a somewhat aggressive chess player.
If you like quiet positional chess, then stay away from this opening.
The first moves are:
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4!?
This opening is part of the Italian game. Black can reject the pawn sacrifice by 4...Bb6 but then White will gain space advantage at the queenside playing 5.a4.
If Black accepts the pawn offer then White will gain the better development of his pieces. But Black should not take the second pawn after 4...Bxb4 5.c3 Bc5? 6.d4 exd 7.0-0 dxc? as after 8.Bxf7+ Kxf7 9.Qd5+ White recaptures the sacrificed piece and the black king is exposed.
Hint: Dont't play 5...Bc5? (as Bishop will be attacked after d4 and this opens up the game too early) but consider only 5...Ba5 or 5...Be7.
Hint: After 4...Bxb4 5.c3 Ba5 6.d4 d6 (not 6...exd?) Black should keep the game closed as White is better developed.