In the Jerome Gambit, White's "extra" pawns can be part of the attack, or part of a fortress of protection. In the following game, they take both roles, as part of the first player's success.
Queenpunisher - parviz1340
12 8, lichess.org, 2016
1.e4 e5 2.Nf3 Nc6 3.Nc3 Bc5 4.Bc4 h6 5.Bxf7+
Transposing to the Semi-Italian Jerome Gambit.
5...Kxf7
The same position would be reached after 1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.Nc3 Bc5 5.Bxf7+ Kxf7.
6.Nxe5+ Nxe5 7.Qh5+ Ng6 8.Qxc5 d6 9.Qh5 Nf6 10.Qf3 Bg4
Black has the right idea: his team of minor pieces should harass the White Queen, even if his own King is not yet castled-by-hand. Perhaps Queenpunisher's Queen should have been harassed by 10...Nh4!? instead.
11.Qg3
The text is a little bit better than 11.Qe3 Re8 12.d3 d5 13.f3 d4 14.Qf2 Bxf3 15.Qxf3 dxc3 16.bxc3 c6 17.O-O Kg8 18.Be3 Qd6 19.Rab1 b6 20.Bd4 Qd7 21.Bxf6 Rf8 22.Qg3 gxf6 23.Qxg6+ Qg7 24.Qf5 Qg5 25.Qe6+ Kh8 26.Qxc6 Rac8 27.Qd6 Rcd8 28.Qf4 Qxf4 29.Rxf4 Rg8 Black resigned, MIG - leshiy, FICS, 2001.
11...Re8 12.d3
Or 12.f3 Bd7 13.d4 Nh5 14.Qf2 Kg8 15.Be3 b6 16.f4 Rf8 17.f5 Ne7 18.g4 Nf6 19.g5 Nxe4 20.Nxe4 Bc6 21.f6 Ng6 22.Qf5 Qe8 23.d5 Bd7 24.Qf3 hxg5 25.Bxg5 Qe5 26.O-O-O Qe8 27.Rde1 Ne5 28.Qg3 Qg6 29.fxg7 Kxg7 30.Rhg1 Qf5 31.Bh6+ Black resigned, youjoin - molesto, GameKnot.com, 2007.
12...Qd7 13.f3 Be6 14.O-O Nh5 15.Qf2 Kg8
For now the "Jerome pawns" provide a shield for White, but that will soon change!
16.Ne2 Rf8 17.b3 Rf7 18.f4 Bg4
This second visit to g4 is ill-advised and will cost a piece. Better 18...Raf8.
19.f5 Bxe2 20.Qxe2 Ne5 21Qxh5 Raf8 22.Bb2 Qc6
White now has attacking prospects.
23.Rf2 Kh7 24.Raf1 Qb6 25.Kh1 Nd7 26.Qg6+
He also could have tried the consistent 26.g4.
26...Kh8 27.Qxh6+ Kg8 28.Qg5 Ne5 29.Rf4
White attacks successfully. He also could have tried the thematic 29.f6.
29...c5 30.Rh4 Rf6 31.Bxe5 dxe5 32.Rg4 Rg6 33.Qxg6 Black resigned
