Jerome Gambit: Rooks at Large

The most well-known defense against the Jerome Gambit is the one that J.H. Blackburne used in a game over 130 years ago. As we have seen on this blog many times, however, it is a tricky defense, and the better player usually wins, despite the "objective" assessment of the line (i.e. it is dynamically equal). This caveat is especially apparent in the following game, where Black errs early - but White makes some later slips, only scoring the full point after much further work. It is not a safe game for Rooks.

ehmorris3 - F-Dynamics
10 0, lichess.org, 2017

1.e4  e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6. Qh5+ g6 7. Qxe5 d6

Blackburne's Defense, famous since Amateur - Blackburne, London, 1884. Black offers a Rook, with the plan to trap White's Queen, and, while she is entombed, to attack White's King.

8.Qxh8 Be6 

It is difficult to grasp the idea behind this move, unless it is simply to follow up the sacrifice with further development. Perhaps Black believes that his opponent will need time to put his Queen back into play. White immediately moves to make sure his Queen will be free.

9.Qxh7+ Kf8 10.d4 

Sacrificing a pawn to prepare for further development.

Instead, 10.Qxg6 was seen in perrypawnpusher - saltos, blitz, FICS, 2010 (1-0, 40) and Wall,B - VJCH, FICS, 2013 (1-0, 16).

An alternative, 10.O-O, was seen in mosinnagant - mumbaII, FICS, 2010 (1-0, 38) 

10...Bxd4 11.Bh6+ 

The idea. White has to be careful about his own Rook on the a1-h8 diagonal, however.

11...Nxh6 

An earlier game had gone 11... Ke8 12.Nc3 Qf6 13.O-O Bf7 14.Nd5 Qe6 15.Nxc7+ Kd8 16.Nxe6+ Black resigned, Petasluk - cuadriculas, FICS, 2008. 

12.Qxh6+ Ke8  13.Qxg6+ Bf7 

A very dynamic position, with White better. The first player has the advantage of a safer King and is three pawns and the exchange ahead in material - but his Queenside is about to be demolished.

In the meantime, where should White's Queen go? There is only one safe square that keeps his advantage.

14.Qg3 

White needed to play 14.Qf5!? in order to be able to answer 14...Bxb2 with the fork 15.Qb5+, when he can then pick up the Bishop. Once Her Majesty  is safe, White can then play c2-c3 or Nb1-c3 to keep the enemy attack on b2 stifled.

14...Bxb2 15.c3 Bxa1 16.O-O Bxa2  

White's original idea might have been to block Black's Bishop in at a1, and then capture it, but that will not work out.

This odd position is about equal.

17.Na3 Bxc3 

Black surrenders his piece too quickly He could have tried 17...Bb2 18.Nb5 a6 19.Nd4 Qf6 20.f4 c5 and held the advantage - according to Stockfish 8. It is really hard for me to judge this unbalanced position.

18.Qxc3 d5 19.Qe5+  Kd7  

Each side has 3 connected passed pawns!  

20.Nb5 Kc8 21.Rd1 Kb8  

Black has castled-by-hand, but in doing so has entombed his Rook. He will not be able to escape checkmate.

22.exd5 b6 23.d6 cxd6 24.Rxd6 Kb7 

Yes, things are this bad. However, even after surrendering the Queen, there will still be checkmate.

25.Rxd8 Rxd8 26.Qe7+ Kc8 27.Nd6+ 

There was also 27.Qc7#, but White has the game in hand.

27...Rxd6 28.Qxd6 Kb7 29.h4 b5 30.h5 Black resigned

Jerome Gambit: Straying From the Right Move, Good and Bad

When I play the Jerome Gambit, I struggle to play the "right" move all the time. I have largely exhausted my creativity at moves 4, 5 and 6. From there, on, it's a question of survivial.

Some players have a different approach - they explore alternatives, within reason but with the idea of exploration for its own sake.

An example is the following game. The attacker strays and creates; the defender strays and does not survive.

Wall, Bill - Guest1061862
PlayChess.com, 2017

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bxd4 7.Qxd4 Qf6 8.Qc3

Black's idea is to play ...Nf3+ and capture White's Queen, if it is unprotected, so that is White's primary concern - how to react to that threat. 

Is there a "best" move here? I am not sure. In this position Bill has also tried 8.Qc5, 8.Qe3, 8.Be3, 8.Qd2 and 8.Nd2 - all successfully.

8...d6 9.Qxc7+ Ne7 10.O-O Rf8 

Black prepares to castle-by-hand. This is a very good idea. His main concern should not be losing a pawn or two, but protecting himself against the dangers along the 7th rank and f-file. 

11.f4 Ng4 

Worrying about the wrong piece. Black could confidently play, instead, 11...Kg8 when White's annoying f-pawn is suddenly pinned (12.fxe5? Qxf1 checkmate), giving the defender time to retreat his Knight to c6. 

12.e5 dxe5 

Going along with White's plan. It was time for Black to safeguard his King and return a piece: 12...Qh4 13.h3 Kg8 14.hxg4 Bxg4, and the game is about equal. Instead, he gives up his Queen.

13.fxe5 Qxf1+ 14.Kxf1 Kg6+ 15.Kg1 Re8 

Black has a piece and a Rook for his Queen. (He is also down a couple of pawns.)  

16.h3 Nh6 17.Qd6+ Kf7 18.Bxh6 Black resigned

Black can see far enough - 18...gxh6 19.Qf6+ Kg7 20.e6 - to know that he will have to surrender another piece (20...Rf8 21.Qxe7 or 20...Bxe6 21.Qxe6), and there is no future in this game.

Jerome Gambit: Who'd A Thunk It?

I just received another Jerome Gambit game played on the internet by Vlasta Fejfar ("vlastous"). The following game show the need for patience in certain lines of that wild, crazy attack. A certain amount of sitzfleisch helps, too. After a period of calm, White suddenly activates his Rooks, and Black does not react well to the danger.

[By the way, this is post #2,500 on this blog. As Mortimer Snerd - or Edgar Bergen - said, "Who'd a thunk it?"]

vlastous - Nyanyiwa
internet, 2017

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 7.Qxe5 d6 8.Qf4+ Qf6

The defense 6...Kf8 is solid and sensible. It can lead to a position where the Queens come off the board before a dozen moves have been played. "Objectively" Black's extra piece is worth more than White's two extra pawns, but in the rough-and-tumble of club play - especially when the first player has knowledge or experience of such lines - there is play to be had for the gambiteer.

9.d3 Qxf4 10.Bxf4 Nf6 11.Nc3 

White has his two "Jerome pawns". Black's extra piece gives him the "two bishops" which are helpful in open positions.

From a psychological point of view, White should consider keeping the game closed, developing his pieces, increasing his control of space - but, otherwise, acting as if Black is the attacker, and letting him make the first mistake.

Other ideas:

11.c3 Bb6 (11...h6 12.Nd2 g5 13.Bg3 Nh5 14.d4 Bb6 15.Nc4 Nxg3 16.hxg3 Kg7 17.f3 Be6 18.Nxb6 axb6 19.a3 h5 20.Kf2 h4 21.gxh4 Rxh4 22.Rxh4 gxh4 23.Rh1 Rh8 24.f4 Bg4 25.f5 Kf6 26.Ke3 d5 27.Kf4 Be2 28.e5+ Kg7 29.g4 hxg3 30.Rxh8 g2 31.Rh3 g1=Q 32.Rg3+ Qxg3+ 33.Kxg3 Kh6 34.Kf4 Bh5 35.e6 Kg7 36. Ke5 c6 37.f6+ Kg6 38.f7 Kg7 39.Kd6 Bg6 40.Ke7 Black resigned,  Philidor1792 - guest2052, Internet, 2012) 12.Nd2 Bd7 13.Nc4 Kf7 14.Nxb6 axb6 15.f3 Rhe8 16.Kf2 b5 17.a3 Be6 18.Ke3 Rad8 19.d4 Bb3 20.Kd2 h6 21.Rae1 g5 22.Be3 Nh5 23.g3 Kg6 24.Re2 Rf8 25.Rf2 Rf7 26.f4 gxf4 27.gxf4 Rdf8 28.Rg1+ Kh7 29.f5 Rg8 30.Rxg8 Kxg8 31.Bxh6 Nf6 32.Rf4 Rh7 33.Bg5 Rxh2+ 34.Ke3 Kf7 35.Rh4 Rxh4 36.Bxh4 c6 37.Kf4 Bc2 38.e5 Nd5+ 39.Kg5 dxe5 40.dxe5 Nc7 41.Bg3 Bd3 42.e6+ Nxe6+ 43.fxe6+ Kxe6 44.Kf4 Kd5 45.Ke3 Bf1 46.Kd2 Kc4 47.Kc1 Kb3 48.Bf2 drawn, Philidor 1792 - guest2498, bereg.ru 2014; 

11.O-O Kf7 (11...Bg4 12.Nc3 Bd4 13.Be3 Bxc3 14.bxc3 b6 15.f3 Be6 16.d4 Re8 17.Bf4 Nh5 18.Be3 Kf7 19.Rfb1 Rhf8 20.Bc1 Kg6 21.d5 Bd7 22.Bd2 c6 23.c4 Nf4 24.Kh1 h6 25.Rb3 Rc8 26.g3 Ne2 27.Rd3 c5 28.c3 b5 29.Re3 bxc4 30.Rxe2 Rxf3 31.e5 dxe5 32.Bxh6 gxh6 33.Rxe5 Rxc3 34.Re7 Rd8 35.Kg1 Rc2 36.Rb1 Rxa2 37.Rb7 c3 38.Rb1 c2 39.Rbe1 Bh3 40.R7e5 c4 41.Rc1 Rb8 42.Re2 Rbb2 43.Kf2 a5 44.d6 Kf6 45.Kf3 c3 46.Ke3 Bf5 47.Kd4 Rb3 48.d7 Ra4+ 49.Kc5 Bxd7 50.Rcxc2 Rb5+ 51.Kd6 Rd4+ 52.Kc7 Rd3 53.Ra2 Bg4 54.Re4 Rd2 55.Rf4+ Kg5 56.Raa4 Bh3 57.Rf8 c2 58.Rc4 Rxh2 59.Rg8+ Kf6 60.Rf8+ Kg7 61.Rf3 Be6 62.Rcc3 Re2 63.Kd6 Rb6+ 64.Kc5 Rb1 65.Kd4 Rd1+ 66.Kc5 Re5+ 67.Kc6 Bd5+ 68.Kd6 Re6+ 69.Kd7 Rc6 70.Rfe3 Kf6 71.Rxc2 Bf3+ 72.Rd2 Rxd2+ 73.Rd3 Rxd3+ 74.Ke8 Rc8 checkmate, GNUChess - GNUChess, OS-RGCX-182777, 2003) 12.Nc3 Bd7 13.Be3 Bxe3 14.fxe3 Ke7 15.Rf3 Rhf8 16.Raf1 c6 17.d4 Ng4 18.Rxf8 Rxf8 19.Rxf8 Kxf8 20.Nd1 Be8 21.h3 Nf6 22.Nc3 Bg6 23.e5 dxe5 24.dxe5 Ne4 25.Ne2 Ke7 26.Nf4 Bf7 27.b3 g5 28.Nd3 c5 29.g4 c4 30.Nb2 cxb3 31.axb3 Ke6 32.Nd3 Kd5 33.Kf1 Nc5 34.c4+ Kc6 35.Ke2 Nxb3 36.Nb2 Nc5 37.Kf3 a5 38.e4 a4 White resigned, blackburne - Argento1960, ChessWorld.net, 2004; and

11.Be3 Bb4+ 12.Bd2 Bxd2+ 13.Nxd2 Kg8 14.O-O-O c5 15.Nc4 Ne8 16.Ne3 Be6 17.h4 Nf6 18.h5 b5 19.h6 g5 20.f3 Kf7 21.d4 b4 22.Rhe1 Rhe8 23.g3 Ke7 24.d5 Bd7 25.e5 dxe5 26.Nc4 Nh5 27.g4 Bb5 28.d6+ Kd8 29.d7 Rf8 30.Nd6 Bc6 31.gxh5 Bxf3 32.Rd3 e4 33.Rd5 Kxd7 34.Nxe4+ Kc6 35.Rxc5+ Kb6 36.Rc4 Rae8 37.Rxb4+ Ka5 38.a3 Rf4 39.Nxg5 Rxe1+ 40.Kd2 Re2+ 41.Kd3 Rxb4 42.axb4+ Kxb4 43.Nxf3 Re6 44.c3+ Ka5 45.b4+ Ka4 46.b5 Rxh6 47.c4 Rxh5 48.Nd2 Kb4 49.Nf1 Rh3+ 50.Ne3 Rxe3+ 51.Kxe3 Kxc4 52.b6 axb6 53.Ke4 b5 54.Kf4 b4 55.Kg5 b3 56.Kh6 b2 57.Kxh7 b1=Q+ 58.Kh6 Qf5 59.Kg7 Qg5+ 60.Kf8 Kc5 61.Ke8 Qg7 62.Kd8 Kd6 63.Ke8 Qg8 checkmate, GNUChess - GNUChess, OS-RGCX-182777, 2003. 

11...a6 12. f3 Kf7

Things quickly went south for Black after 12...Be6 13.Bg3 g5 14.e5 dxe5 15.Bxe5 Kf7 16.Bxf6 Kxf6 17.Ne4+ Black resigned, Wall,B - Guest2651667, PlayChess.com, 2015. 

13.Bg3 Re8 14.Bf2 Bb4 15.a3 Bxc3+ 16.bxc3 b6

Black has surrendered the Bishop pair to injure White's pawn structure. He still has a long way to go to collect more than a half point, however. In the meantime, White startssome action on the Kingside.

17.Kd2 Bd7 18.g4 h6 19.h4 d5 20.g5 hxg5 21.hxg5 Ng8 

White is ready for some action on the Kingside, starting with a surprise.

22.g6+ Kxg6

Immediately, Black slips. He would have done better side-stepping the pawn with 22...Ke6, but he misses White's plan (perhaps because White has been so "quiet" with his play. The capture allows White a useful gain of tempo in response.

23.Rag1+ Kf7 24.Rh7 Ke7 

You can see the rest of the game from here. Whites Rooks spring to life.

25.Rgxg7+ Kd6 26.Rxd7+ Kc6 27.Rxc7+ Kb5 28.exd5 Nf6 

Black is suddenly 4 pawns down, 3 of them passed, but he hopes to use this Knight fork to win one back. Alas he slips.

29.Rh6 Nxd5 30.c4+ Black resigned

Jerome Gambit: How Do You Know When The Game Is Over?

I am not a painter. I have always wondered: How do you know when a painting is finished? How do you know when you have made your last stroke, and it is time to put the brush down? When does a painting have exactly enough, and needs no more?

These thoughts came to me as I considered the final position in the following game, where Black resigned. How did he know that it was time?

Wall, Bill - Guest816337
PlayChess.com, 2017

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+

4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bxd4 7.Qxd4 d6 8.O-O Nf6

An ordinary position for this line. I was going to say that Bill has reached it a gazillion times, but it turns out that the number is only 17. The position goes back to Jerome - Shinkman, Iowa, 1876 (1/2-1/2, 42).

9.Bf4

This is a bit unusual, however. The Bishop usually goes to g5 or b2. There are only 4 games in The Database with this move - two of them by guess who?

9...Re8

Also 9...Be6 10.Nc3 Re8 11.Rad1 Nc6 12.Qd2 Bg4 13.f3 Bh5 14.Nd5 Nxd5 15.Qxd5+ Kf8 16.Qxh5 Kg8 17.Qd5+ Kh8 18.c4 Nb4 19.Qb5 a5 20.a3 Nc2 21.Rf2 Qf6 22.Bg5 Nd4 23.Qxe8+ Rxe8 24.Bxf6 Nxf3+ 25.Rxf3 gxf6 26.Rxf6 Rxe4 27.c5 Re2 28.Rf7 Rxb2 29.cxd6 Kg8 30.Rxc7 Kf8 31.d7 Black resigned, Wall,B - Guest3687203, PlayChess.com,  2015.

10.Nc3 Nc6 11.Qd2

If you play the Jerome Gambit, you need to be a bit of a psychologist. You need to have an insight into what your opponent is trying to do (here: pressure and capture the e-pawn) as well as ideas on how to thwart his plans - or, on occasion, help them along. 

Ordinary play would be 11.Qd3, doubly protecting the twice-attacked pawn, when Black would continue to castle-by-hand andbe better.

11...Nxe4

Of course, reasons Black, anyone foolish enough to throw away pieces can hardly be expected to keep track of his pawns, too...
And so the defender falls for a small trick that, had he seen it in a book of chess puzzles, he would have identified immediately.

12.Qd5+

Oh, yeah, right.

12...Re6

A bit better - because it focuses on development - is 12...Be6 13.Qxe4 Qf6 14.Bg3 Kg8  when White has regained his piece and the game is about even.

13.Nxe4

13...Ke8

Black gets out of the pin on his Rook, and avoids the Knight fork of the Rook and his King (Ng5+). However, the situation required 13...h6 when White would only be a little bit better.

14.Rae1

White could play the Knight move, but prefers to develop a piece and build up pressure against the enemy King. 

14...Ne7

Defense is already a serious problem. Black decides to evict the enemy Queen. He could have reinforced his troops on the e-file with 14...Qe7, but White could have continued 15.Bxd6 cxd6 16.Nxd6+ Kf8 17.Nxc8 removing the Rook's other defender and forcing 17...Rxe1 18.Nxe7 Rxe7, when White would have a Queen and two pawns to Black's Rook and Knight.

15.Qh5+ Ng6 16.Ng5 Rxe1 17.Rxe1+ Kd7 18.Ne6 Black resigned

At first glance it it clear why Black is worse - while equal in material, he lags in development and his unsafe King blocks his Bishop, which in turn blocks his Rook - a typical Jerome Gambit ailment. But, is it time to resign?

The first thing to look at is that Black's Queen is attacked - where will she go? It is clear that 18...Qe8 or 18...Qe7 can be answered by 19.Nc5+ uncovering an attack on Her Majesty. On the other hand, the "safe" 18...Qh8 leads to checkmate after 19.Qd5 (intensifying the impact of the next move) Ne7 20.Nc5+ Ke8 21.Bg5, etc.

That leaves one last back rank move, 18...Qg8, which can masterfully be met by 19.Qb5+ c6 20.Qb3 when White again threatens Nc5+, winning the Black Queen a different way.

Perhaps Black's Queen doesn't need to cower? She could try 18...Qf6. White, however, would have 19.Qd5, again, with brutal pressure on the d-file, for example 19...Nxf4 20.Nc5+ Kd8 21.Qg8+ Qf8 22.Qxf8#. Black's best response to 19.Qd5 is 19...Ne7, when 20.Qc4 c6 21.Bg5 is simply too much pressure on his position, e.g. 21...Qf7 22.Nc7 winning the Rook.

That leaves only the Queen escape 18...Qh4, which falls, as well, to 19.Qd5, as Black will have to give up his Queen with 19...Qxf4 in order to prevent checkmate.

Wow. I can see Bill figuring all of this out, as he is a chess expert. But, his opponent - if he was smart enough to see enough to resign, how did he get into that mess in the first place? Ah, the mysteries of the Jerome Gambit!

Jerome Gambit: Pay Attention

In the Jerome Gambit, Black and White face the same challenge: paying attention. Black often is in an unfamiliar and risky situation, and must be aware of dangers as they arise. White has to apply pressure, and be ready to pounce when Black lowers his guard - and, the more the pressure he applies, the greater opportunity he has to pounce.

The following game shows this, as everything is calm and routine - until checkmate. Ouch.

Wall, Bill - Guest522870
PlayChess.com, 2017

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.d4 

Alonzo Wheeler Jerome's first choice, before moving on to 6.Qh5+, and Bill's current preference. It is less forcing, which means, among other things, that it gives less direction for Black in preparing his defense.

6...Bxd4 7.Qxd4 d6 8.O-O Nf6 9.Nc3 Rf8 

Black is planning on castling-by-hand, a good defensive strategy. He should not allow himself to be distracted.

10.f4

A standard move in this kind of position: kick the Knight on e5 and get the "Jerome pawns" moving, with the possibility of a pawn advancing to e5 or f5. An alternative was the developing 10.Bg5. 

10...Neg4 

Bill has also faced the more restrained 10...Nc6 in Wall,B - Anonymous, lichess.org, 2016, (1-0, 19) and Wall,B - Anonymous, lichess.org, 2016 (1-0, 46).

11.h3 c5 

It is often a good idea to meet an attack on one of your pieces with an attack on one of your opponent's pieces. Here, Black's pawn attack on the enemy Queen forces White to ignore the threat to the Knight on g4.

12.Qc4+ Be6 

How to answer the Queen check is a standard concern in some lines in the Jerome Gambit. Black is happy to respond to the check by developing a piece, probably a bit better than the alternative, 12...d5.

13.Qd3 Nh6 14.f5 Bd7

Black plans on giving up his pawn on d6, in order to reposition his Bishop on c6, pressuring White's pawn on e4. There is a problem with this idea, however, which means that the proper move was 14...Bc8.

15.Qxd6 Bc6 6.Qe6 checkmate

Oh, yeah, that.

Jerome Gambit: More or Less (Part 2)

[continued from previous post]

perrypawnpusher - scarsetto
5 5 blitz, FICS, 2017

What is going on?

Here we have the position from a recent blitz game of mine, before I played the decent 11.Nc3, believing that an extra piece would help weave a mating net. This is opposed to Stockfish 8's suggestion of 11.Qb3+, which would lead (perhaps after a long and winding road) to a win of material and a simple advantage for White. 

Years ago, I had played 11.d4, which, I later noted on this blog, was insufficient, as 

after 11...Bb4+ 12.c3 Bf8 it is not clear that White has anything more than checking his way repeatedly to a draw.

That is such an annoying assessment, let me show the position:

Drawn??

analysis diagram





I let Stockfish 8 analyze until a depth of 30 ply, without finding anything better than forcing a draw. I suspect, though, strong Jerome Gambiteers would simply castle and figure out the rest later...

By the way, instead of entering the recommended line in that 11.d4 game, my opponent immediately returned his extra piece with 11...Bxd4 and I was able to win the game in 46 moves, perrypawnpusher - hotintheshade, blitz, FICS, 2009. Once again, my "unscientific" opening was assisted by my opponent's "scientific" response - in this case, following the notion that a sacrificial attack can be blunted by returning material.

Back to the recent game.

11...Qh4+ 

There is something really silly about me going through a pile of analysis - after the game, in preparation for this post (and the previous one) - only to have it all wiped out by the reality of what really happened. Perhaps I was right to "move first and think later" after all.

Black can definitively show that there is no checkmate by playing the alternative 11...a5, when White gets his piece back with 12.Na4+ (the idea behind 11.Nc3, which is why I played the move in the first place) Ka7 13.Qxc5+ b6 14.Qd4 Bb7 15.0-0 when White would still be better.

Years earlier, I had faced 11...d6, which should have led to the quick 12.Qb3+ Bb4 13.Qxb4+ Ka6 14.Qb5 checkmate, but led, instead, to the obvious 12.Na4+ Ka6, when I missed 13.b4!? - but won the game, anyhow,  perrypawnpusher - Ondras, blitz, FICS, 2012 (1-0, 31). I'm always so much smarter after the game.

It is worth playing over the lines until you, too, can decide - mate or material?

12.g3 Qh3 

While a sudden Queen check can often upset a position, the problem here is that the enamy Queen has to dodge the pawn, and my attack can continue. Still, if the Black Queen can get to g2...

Interestingly enough, the text is not an improvement over the previous 12...Qf6 13. Na4+ (even stronger 13.Qb3+!? Kc6 14.Qb5+ Kd6 15.e5+ winning the Queen) 13...Ka6 14.Nxc5+ Kb5 15.a4+ Kb6 16.a5+ Black resigned, sabreman - Lovebuzz, FICS, 2014.

13.Na4+ 

Winning material, but missing the move 13.b4!?, which leads to mate: 13...Bf2+ 14.Kxf2 Qh5 15.f5 Ng4+ 16.Kg1 Qxf5 17.exf5 a5 18.Qc5+ Ka6 19.Qxa5#.

White is still much better after the text, and it is possible that in the game (blitz) I didn't have (take) time to analyze the position out to checkmate - but for sure this kind of position should yield deadlier results next time.  

13...Kb5 

Black is in a bad way. He would last longer with 13...Ka6, and in a blitz game - with clocks ticking - that would have given him chances to survive, if my time expired. Nonetheless, against that move White can grab back material, build an attack, and eventually checkmate: 14.Nxc5+ Kb6 15.Na4+ Ka6 16.b4!? b5 17.Nc5+ Kb6 18.a4 (I need another piece in the attack) c6 19.Qd6 a5 20.d3 (opening a line for another piece) Qe6 (nothing works for Black now) 21.bxa5+ Rxa5 22.Qb8+ Bb7 23.Qxb7+ Kxc5 24.Ba3+ Kc4 25.Kd2 b4 26.Qxb4+ Qc4 27.Qxc5 checkmate.

That's a long line, but pretty straight-forward.

14.Qxc5+ 

Funny. I had my mind set on one thing, and one thing only. Of course, White had, instead, 14.c4+ Kxa4 first, then 15.Qxc5 Qf1+ (delaying the inevetible) 16.Rxf1 b6 17.b3#.

A win is a win is a win; but a checkmate is a good idea, too.

14...Kxa4 

The ultimate psychological slip. So many of us have grown up playing over games of the masters featuring sacrificial frenzies that lead to glorious finishes. How easy it is, when on the receiving end, to figure "I am lost!" and succumb in classic style.

Again, if time were not a factor, Black could choose a tougher line of defense: 14...Ka6 15.Qxc7 b6 16.b4!? Qe6 17.Nc5+!? bxc5 18.b5+!? Kxb5 19.Rb1+ Ka4 20.0-0!? Qc4 21.Rf3 (that's why White castles) Qd4+ (delaying the inevitible) 22.Kg2 Qxd4 23.Qxc5 Qe2+ 24.Kg1 Qe1+ 25.Rf1 Qxf1+ 26.Kxf1 Ba6+ 27.Kg1 d6 28.Rb4#

All these tactical lines were uncovered by Stockfish 8 after the game.

If the reality is that my opponent did not find the most spirited way to defend, it is even more true that I did not find the most effective way to attack. We both stumbled; he fell. The Jerome Gambit is very much like that.

15.b3 checkmate

(If you ignore the analysis in the notes, it looks like a killer game. More or less.)