Chessworld.net's Jerome gambit Adviser & Replay Lab

 

Chessworld.net's really cool Replay Lab has some great coverage of the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+), in its Jerome Gambit Adviser & Replay Lab.

If you have been playing the Jerome forever, it still might be a nice postcard to remind you where you have been.

However, if you are new to the opening, or want to gain a broader understanding of the Jerome Gambit, I encourage you to check it all out.

As you might expect from a laboratory, there are these bits of scientific perspective

White sacrifices two pieces to expose Black's king, so the opening is exciting, dangerous, and objectively risky.

Quick recommendation: Study the Jerome Gambit as a tactical laboratory and surprise weapon, not as a dependable main repertoire opening.

Topic headings include

Three Jerome Gambit positions to recognise

Jerome Gambit Replay Lab

Jerome Gambit branch map

Plans for White

Plans for Black

Frequently asked Jerome Gambit questions

Jerome Gambit basics

Practical value, mistakes, and comparisons

I might answer the following questions differently, but Chessworld's replies are very much worth reading. 

Is the Jerome Gambit good for beginners?

The Jerome Gambit is not ideal as a beginner's main opening. It can teach attacking urgency and the danger of exposed kings, but it also teaches habits that fail against accurate defence. Use the Jerome Gambit Adviser to study it as a tactical laboratory rather than a full repertoire.

Should I play the Jerome Gambit in serious games?

You should not rely on the Jerome Gambit in serious games unless you accept a high-risk surprise weapon. The line gives Black a material advantage with correct play, so White's practical chances depend on unfamiliarity and time pressure. Use the Replay Lab's Black-win examples before deciding whether the surprise value is worth the risk.

Where the Jerome Gambit fits in your study

The Jerome Gambit is best treated as a lively attacking experiment and a defensive-awareness drill. It belongs beside other romantic gambits as a practical lesson in king exposure, material imbalance, and the danger of assuming an unsound line cannot hurt you.

Just as the German chess magazine Randspringer titled itself as "The magazine not for every chess player", so, too, is the Jerome Gambit not for every chess player - but, for a number of us, it is well worth embracing. 

Jerome Gambit: Over-Run by Ghosts

There are times when the Jerome Gambit can be characterized as a battle between "extra" pawns and an "extra" piece.

White's pawns in the following match begin to look like a swarm of ghosts.

Chessriddler sends the following game along.

CANNON_89 - ForkingBishop

3 0 blitz, lichess.org, 2026

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6 

In other games

6...Ke6 7.Qf5+ Kd6 8.b4 Bxf2+ 9.Qxf2 Qf6 10.Qc5+ Ke6 11.Rf1 Qh4+ 12.Rf2 Nf6 13.Bb2 d6 14.Qxc7 Bd7 15.Bxe5 dxe5 16.Qc4+ Ke7 17.Nc3 Rac8 18.Qd3 Rxc3 19.Qxc3 Rb8 20.Qxe5+ Kf7 21.Qxb8 Qxe4+ 22.Re2 Qf5 23.Qg3 Be6 24.Qf3 Ke7 25.Qxf5 White won on time, KNVB [Canadian Grandmaster Aman Hambleton] - CANNON_89,Chess.com 2023; and 

6...Kf8 7.Qxe5 d6 8.Qg3 Qf6 9.Nc3 c6 10.b3 Nh6 11.Bb2 Ng4 12.O-O-O Bxf2 13.Qd3 Ke7 14.h3 Ne5 15.Qe2 Bb6 16.Rhf1 Qg6 17.Kb1 Be6 18.d4 Nd7 19.d5 Bf7 20.dxc6 bxc6 21.Ba3 c5 22.Nb5 a6 23.Nxd6 Rab8 24.Rxf7+ Qxf7 25.Nxf7 Rhc8 26.Qg4 Rc7 27.Qxg7 Nf6 28.Ng5+ Ke8 29.Qh8+ Ke7 30.Qxb8 Ba5 31.Qd8 checkmate, CANNON_89 - zhar84, lichess.org, 2023

7.Qd5+ 

A "nudge".

7...Ke8 8.Qxc5 d6 9.Qe3 Nf6 

Accoring to The Database, in 1,962 games White has scored 59% from this position, even though Stockfish 17.1 (34 ply) rates Black about 2 pawns better.

Jerome Gambit.

10.O-O Be6

Quickly developing the Bishop, but at this location it calls to White's "Jerome pawns".

11.f4 Ne7 12.f5 Bd7 13.d4 Kf7 

Black plans to castle-by-hand.

14.c4 

Another pawn in the center.

14...Re8 15.Nc3 Kg8 16.h3 c6 17.g4 

Those pawns are looking scary. The computer reassures Black that the position is equal, but, still...

17...d5

Black has to strike back at the advancing pawn center, but he would do better using an idea borrowed from the Benko Gambit: 17...c5 18.d5 b5 19.Qf3 b4 20.Ne2 Nxe4 21.Qxe4 Nxf5 22.Qf3 Rxe2 23.Qxe2, still even game.

18.e5 Nc8 19.Qf3 Ne4 

Giving back a pawn, but it is not enough.

20.Nxe4 dxe4 21.Qxe4 

Ghosts!

21...Nb6 

21...b5 was still a good idea. 

22.b3 Qc7

To stop the e-pawn from advancing, but this only works for a move.

23.Bf4 Qd8 

Yikes! Stepping out of the line of fire.

24.e6 Bc8 25.Rad1 Qh4 

Again.

26.Qf3 Rf8 27.d5 

The Flying V.

Contrast the activity of White's pawns versus the inactivity of Black's pieces.

27...cxd5 28.cxd5 Kh8 29.d6 Bxe6 30.fxe6 Black resigned

Connected passed pawns on the 6th rank...

Jerome Gambit: The Road More Travelled (Part 3)

                                                        

[continued from the previous post]

How to pursue the attack?

21.Qg4 

Out of one pin and into another. Instead, 21.Qh5 is correct, although after 21...Qe8 my opponent can keep the position even.

21...Bxf5 

Unfortunately, the wrong piece to capture with. Instead, 21...Rxf5 22.Rxf5 Qd7 will keep Black a piece-for-a-pawn ahead.

22. Rxf5 Rxf5 23. Qxf5 Ne7 

White is a pawn up, and it is a passer.

24.Qf3 

It should not have been too hard to find 24.Qe6+ Kh8 25.Nh4 pinning and winning a piece.

24...Qd5 25.Qxd5+ 

Simplifying; not best.

25...cxd5 26.d4 

With an extra (passed, protected) pawn and a (bad) Bishop, I can be satisfied with my position. Time to centralize my King.

26...Nf5 27.Bf2 g6 28.Kg1 g5 29.Kf1 Rf8

30.Ke2 Nh4 

Possibly expecting that I would not give up the "minor exchange" of Bishop for Knight. The Knight would do better to return to e7 and await events.

31.Bxh4 gxh4 32.Rf1 Rxf1 33.Kxf1 Kf7 

34.Kf2 Ke6 35.Kf3 a5 36.Kg4 b5 37.Kxh4 c5 38.Kh5 cxd4 39.cxd4 b4 

40.Kxh6 a4 41.g4 b3 

This move brings a smile to my face: If White now "captures toward the center" as is generally recommended, Black promotes a pawn to a Queen faster than White, (although the first player still wins) - 42.axb3 a3 43.g5 (the only move, but obvious) a2 44.g6 a1/Q 45.g7 Qa8 46.Kh7 Qa7 47.Kh8 and 48.g8/Q.

42.cxb3 axb3 43.axb3 Black resigned

My opponent gave me quite a battle - especially since I out-rated him by over 750 points.

Jerome Gambit: The Road More Travelled (Part 2)

 

[continued from the previous post]

10.Bg5 h6 11.Bh4 Kg8 12.Kh1 Be7 13.Bg3 Be6 

Black has developed his extra piece. Are his Bishops possible targets? I am ready to advance my "Jerome pawns" and find out.

14.f4 Ng4 

This move threatens a fork at e3, but otherwise does not accomplish much.

Stockfish 17.1's analysis combines maneuvering and tactics: 14...g6 15.h3 Kh7 16.Bh2 Rg8 17.Qe2 Qd7 18.Rf3 c5 19.Raf1 Rae8 20.b3 Qc6 21.Nd1 Nd7 22.c4 Bf6 23.Ne3 Bd4 24.Nc2 Bg7 25.Ne3 Rgf8 26.Nd5 Bg8 27.Qe1 Kh8 28.Qf2 Bxd5 29.cxd5 Qd6 30.f5 - interesting, but well over my and my opponent's head.

15.Qf3 Bc5 

The e3 square still calls to the Knight.

16.Rae1 Bb4 

Black's pieces look active, but they are actually just scattered.

17.h3 

Ejecting the enemy Knight. A bit stronger is 17.e5!?

17...Bxc3 18.bxc3 Nf6 

After the game was over, I listened to the "coach" at Chess.com provide feedback. It was mostly scolding, with a few complements scattered.

The fact is, although I played confidently, I have to repeat the truism: The more a person is in error, the stronger they may hold onto their opinion

19.e5 

After the game, Stockfish 17.1 pointed out that it was okay to sacrifice the a-pawn, preferring 19.f5 Bxa2 20.c4 b5 21.e5 bxc4 22.exf6 Rxe1 23.Rxe1 Qxf6 24.Re6 Qf7 25.Qxc6 Rd8 26.dxc4 Qxf5 27.Re7 Kh7 28.Qxc7 Rg8 29.Be5 Qg5 30.Bc3 Bb1 31.Re4 Qd8 32.Qxa7 Bxc2 33.Re7 Qd1+34.Kh2 Qd6+ 35.g3 White is assesed as about 3 pawns better

Okay, that's pretty funny. In real life, I am rated over-the-board a low Class B player, and such in-depth analysis makes my head spin...

19...Nd5 20.f5 Rf8 

This much, I understand: White's pawns are rolling, and Black's Rook pins the f-pawn, preserving his Bishop.

[to be continued]

Jerome Gambit: The Road More Travelled (Part 1)

My most recent Jerome Gambit game was like traveling down a road that I had visited many times before.

There are a lot of links to games in the notes.

perrypawnpusher - GatorOpening

3d/move, Chess.com, 2026

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Kf8 

The March 1875 issue of The Dubuque Chess Journal contained the game Jerome - Brownson, Iowa, 1875 (1/2 - 1/2, 29), in which this move first appeared.

Black assesses his position as good enough that he does not need to capture White's Knight. 

I decided to not give him a second chance.

6.Nxc6 dxc6 

Capturing with the d-pawn puts pressure down the d-file and prevents me from playing d2-d4.

7.O-O 

It is also reasonable to play 7.d3 followed by 8.O-O, as in perrypawnpusher - fortytwooz, blitz, FICS, 2010 (1-0, 29); perrypawnpusher - Jore, FICS, 2010 (0-1, 16); perrypawnpusher - Conspicuous, blitz, FICS, 2011 (1-0, 13);  perrypawnpusher - Lark, FICS, 2011, (1-0, 12); and perrypawnpusher - pitrisko, blitz, FICS, 2011 (0-1, 30). 

7...Nf6 

I have faced a variety of defenses:

7...Qh4 as in perrypawnpusher - Al-der, Chess.com, 2019 (1-0, 26); 

7...Ne7 as in perrypawnpusher - smarlny, blitz, FICS 2011 (1-0, 25); 

7...Be6 as in perrypawnpusher - CorH, blitz, FICS, 2009 (0-1, 74); perrypawnpusher - spince, blitz, FICS, 2013 (1-0, 29); and perrypawnpusher - PasayDefence, Piano Piano, Chess.com 2020 (1/2-1/2, 57);  

7... Bd6 as in perrypawnpusher - Lark, blitz, FICS, 2009 (1-0, 18); 

7... h5 as in perrypawnpusher - jackedU711, Giuoco Piano Game, Chess.com 2023 (1/2-1/2, 14); and

7...Qf6 as in perrypawnpusher - DaniyarManat, Chess.com 2021 (1-0, 19) 

8.d3 Kf7 

Planning to castle-by-hand.

I have also faced 8...h6 as in perrypawnpusher - vladchess, blitz, FICS, 2011 (1/2-1/2, 46);

and 8...Bg4 as in perrypawnpusher - MRBarupal, blitz, FICS, 2011 (1-0, 13); perrypawnpusher - MRBarupal,  blitz, FICS, 2011 (1-0, 24); and perrypawnpusher - hamadkargarfard7, Jerome Gambit Classic #1, 2024 (1-0, 25); 

9.Nc3 Re8 

Or 9...Rf8 10.Bg5 Kg8 11.e5 Bg4 draw, perrypawnpusher - Ykcir, blitz, FICS rated blitz 2009.

After the game Stockfish 17.1 (31 ply) rated this position as about 1 3/4 pawns better for Black.

As the poet Robert Frost (an avid chessplayer) said, I had miles to go before I sleep...

[to be continued]

Not (Yet) the Jerome Gambit

In 1988 (20 years before this blog began, and more than a dozen years before my fascination with the Jerome Gambit), Caissa Editions published The Marshall Gambit in the French and Sicilian Defenses, by Rick Kennedy (that's me) and Riley Sheffield, with an Introduction by openings explorer Hugh E. Myers. (The title was previously briefly mentioned on this blog about 10 times.)

The book focused on two lines of play for Black, 1.e4 e6 2.d4 d5 3.Nc3 c5!? and 1.e4 c5 2.Nf3 e6 3.d4 d5!?.

Much of the research within those pages came from visits to the White Collection in the Cleveland Public Library - the largest publicly accessible collection of chess items in the world.

That investigating was productive - and, largely, necessary, as at that time commercial chess game databases had hardly appeared: ChessBase 1, for the Atari ST computer, came out in 1987; and ChessBase 2, for the PC running DOS, came out a year later. (ChessBase for Windows appeared in 1994.)

Relatedly, Fritz 1 (named Knightstalker in the US), an analysis and playing chess engine, appeared as an MS-DOS program in 1991. 

In preparing the book manuscript, Riley and I also put together a chapter on a "reversed Marshall Gambit", 1.e4 e6 2.d4 d5 3.exd5 exd5 4.c4, but eventually decided to leave it out when the book went to press, as it was incomplete.

(One variation of the "reversed", coming out of the Queen's Gambit Accepted, is as old as the Göttingen manuscript of 1490, i.e. 1.d4 d5 2.c4 dxc4 3.e3 e5 4.Bxc4 exd4 5.exd4) 

In any event, today's blog post was inspired by the recent appearance of The Exchange French: The Monte Carlo Variation in Theory & Practice by Vladimir Okhotnik (Russell Enterprises).

(The Exchange French Comes to Life by Alex Fishbein [2021] had a dozen pages on what the author called the Miezis Variation, after Grandmaster Normunds Miezis, who has played it over 250 times, coming out of the English Opening, i.e. 1.c4 e6 2.e4 d5 3.exd5 exd5 4.d4)  

Any day now, the post will deliver Okhotnik's book, and a small part of my chess life will have come full circle.

Jerome Gambit: Tournaments Update Update

 

In "Tournaments Update" I reported

My play in the second Chess.com's "Italian opning rapid players" tournment has come to the end.

Although the top-rated player, I will finish fourth (not all the other players' games are completed) with a score of 12 - 4 - 6. 

Tadeasek200 is running away from the field with a score of 19 - 0 - 1, with two games left to complete.

In fact, Tadeasek200 finished in first place in "Italian opning rapid players", scoring 20 - 1 - 1. The one loss was on time. I knicked him for his one draw.

Continuing from "Tournaments Update"

I managed to play 2 Jerome Gambits - wins against BIJAN_H_F and diegorocha82 - and 2 Noa gambits - draws against Tadeasek200 and Serega40.

Updating other tournament news

In the meantime, I have 2 games to complete in the Chess.com "Not only the Italians plays the Italian game" - both against JAMARTINO, which will decide second place.

In Round One of  "Not only the Italians plays the Italian game", Group 15, I played a Semi-Italian Four Knights Jerome Gambit, a Blackburne Shilling Jerome Gambit, and a Noa Gambit.

I did well enough to move on to Round Two, Group 6, where I scored 6 - 0 - 0, managing a Semi-Italian Four Knights Jerome Gambit and a Noa Gambit; placing me in position to move on to Round Three.

Also, I have scored 2 - 0 - 0 in the third round of the Chess.com

"BISHOP'S OPENING CUP 2025". As I mentioned in "Jerome Gambit: Games Update"

My hope is to play a number of Abrahams Jerome Gambits, 1.e4 e5 2.Bc4 Bc5 3.Bxf7+, a line that I have not tried before, but is worth exploring.

So far, no luck in being able to play an Abrahams Jerome. There are 4 games left in the third round of "BISHOP'S OPENING CUP 2025" so I soon shall have some more chances.