In the Erben Gambit, a pawn is sacrificed by black for speedy placement of the pieces eyeing towards the white king. This opening has been played in shorter formats at the utmost top level chess though may not be effective in the longer formats as it may be countered properly.
1.e4 e5 2.Nc3 Nf6 3.g3 d5 4.exd5 c6 5.d6 Bxd6 6.Bg2 0-0 7.d3 Re8 8.Nf3 h6 9.0-0 Na6 10.Re1 Bf5 11.a3 Nc7 12.b3 Qd7 13.Bb2 Rad8 14.Nd2 Bg4 15.Bf3 Qf5 16.Nce4 Bxf3 17.Nxf3 Nxe4 18.Rxe4 Nd5 19.Nh4 Qe6 20.Qf3 Nf6 21.Re2 Qd5 22.Rae1 Nd7 23.Qg4 Nf6 24.Qf5 Nd7 25.c4 Qe6 26.Qxe6 Rxe6 27.Nf5 Nc5 28.Nxd6 Rdxd6 29.Bxe5 Rxd3 30.b4 Nd7 31.Bf4 Rxe2 32.Rxe2 Rxa3 33.Re8+ Kh7 34.Rd8
This creates an opportunity for black to proceed further with the attack on white pawn.
Nb6 35.c5 Nd5 36.Rd7 Nxf4 37.gxf4 a5 38.bxa5
Giving black a passer on the queen side.
Kg6 39.Rxb7 Rxa5 40.Kg2 Rxc5 41.Kg3 Rc3+ 42.f3 Kf6 43.h4 h5 44.Rc7 Rc5 45.Rc8 g6 46.Rc7 Ke6 47.Rc8 Kd7 48.Rf8 Rf5 49.Ra8 Kd6 50.Ra4 c5 51.Kf2 Kd5 52.Ke3 Rf6 53.Ra7 Re6+ 54.Kd3 c4+ 55.Kd2 Rf6 56.Rd7+ Kc5 57.Rc7+ Kb5 58.Ke3 Kb4 59.Rb7+ Kc3 60.Ra7 Kc2 61.Ra2+ Kb3 62.Ra7 c3 63.Rb7+ Kc2 64.Rc7 Kb2 65.Kd3 Rd6+ 66.Ke2 c2 67.Rb7+ Kc1 68.Rxf7 Re6+ 69.Kf2 Rb6 70.f5 Kb2 71.fxg6 c1Q 72.g7 Qc5+ 73.Kf1 Qc4+
And the rook is lost.
In the Polluck Gambit and Erben Gambit, white fianchettos the kingside bishop and a comfortable game is played which is not hyper aggressive setups like the previous openings. But these have been played at the utmost high level of chess game.In the Mengarini opening,white awaits black's plan and plays accordingly to improve his game and hence the position. ALthough I have already explained the ideas which might just have been implemented by white player.