I found it interesting to see how the computer at lichess.org annotated the moves of the following Jerome Gambit played there. Of course the silicon player does not like the Jerome - but, in its assessment, it takes a number of "inaccuracies" by Black for White to be able to level the game, and a "blunder" for White to gain the advantage.
The notes and variations given below are from the "machine", except for a few of my own comments, given in red.
Bigcaptain - perseus15
blitz 5 2, lichess.org, 2015Bigcaptain - perseus15
1.e4 e5 2.Bc4 Nc6 3.Nf3 Bc5 4.Bxf7+?
C51 Italian Game: Jerome Gambit (0.17 â()/^ -1.87) Mistake. Best move was Nc3.
4.Nc3 d6 5.Na4 Bb6 6.O-O Nf6 7.d3 O-O 8.a3 Be6 9.Bxe6 fxe6 10.Bd2 Qe8.
4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bb6?!
(-1.96 â()/^ -1.03) Inaccuracy. Best move was ...Bxd4.
6...Bxd4 7.Qxd4
It is interesting that the computer missed 6...Qh5!?
7.dxe5 Ke8
A novelty according to The Database.
8.O-O Ne7 9.Nc3 d6?!
(-0.65 â()/^ 0.01) Inaccuracy. Best move was ...Ng6.
9...Ng6 10.Nd5 Nxe5 11.a4 c6 12.Nxb6 axb6 13.f4 Nf7 14.b4 Qe7 15.Qd4 b5 16.a5.
10.Bf4?!
(0.01 â()/^ -0.77) Inaccuracy. Best move was Qh5+.
10.Qh5+ g6 11.Qh4 dxe5 12.Rd1 Bd4 13.Bg5 Qd7 14.Ne2 Qe6 15.Nxd4 exd4 16.Rxd4 Nc6.
10...Rf8 11.Qh5+ g6 12.Qh4 Nc6?!
(-0.63 â()/^ -0.01) Inaccuracy. Best move was ...dxe5.
12...dxe5 13.Rad1 Qxd1 14.Nxd1 exf4 15.Nc3 Be6 16.Qxh7 Bd4 17.Qh6 Rd8 18.Rd1 Rd7 19.Nb5
13.Bg5 Ne7??
(0.00 â()/^ 5.52) Blunder. Best move was ...Qd7.
13...Qd7 14.exd6 cxd6 15.h3 Bd4 16.Nd5 Bxb2 17.Rad1 Be5 18.f4 Bd4+ 19.Kh1 Qf7 20.Rxd4
14.Nd5 Rf7??
(5.56 â()/^ 8.58) Blunder. Best move was ...Be6,
14...Be6 15.Bxe7 Qd7 16.Nf6+ Rxf6 17.exf6 h5 18.e5 Kf7 19.exd6 cxd6 20.Rad1 d5 21.Qf4
15.Nf6+ Rxf6 16.exf6
Black resigned
Black has two pieces for a Rook and two pawns, but he faces disaster along the d8-h4 diagonal. True, his Queen can slip to safety with 16...Qd7, but after 17.Qxh7 White's checkmate threats are deadly. All that is left is 17...Qe6, when 18.fxe7 leaves the defender facing the thread of Qh7-h8+ and an impending pawn promotion. The logical 18...Bd4 falls to 19.Rad1, as 19...Qf7 20.Qxf7+ Kxf7 21.Rxd4 loses material while 19...Bxb2 saves the Bishop but allows the Rook to enter the fray with Rd1-d3-f3.
That is a lot to deal with in a blitz game!
