Jerome Gambit: Scared Silly

Questions. When it comes to the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+), I get questions. I also get a lot of games. I love it.

Sometimes, I get both a game and some questions.

I was recently inspired to try out the now famous Jerome Gambit in a recent game. My opponent played g6, and after capturing the Knight on e5 my opponent played ...Qe7. My question is that if I capture the rook what is the best defence against ...Qxe4+? My opponent got a perpetual and settled for a draw but I think he could have won quite easily. Is it a blunder to capture the rook in this position as it seems a waste of the gambit not to capture. I've attached the pgn of the game if you would like to see it.

I was very happy to answer.

Have you ever scared someone silly? Got them so frightened that they were not thinking right at all?

Well, looking at the Jerome Gambit game that you sent me, I know that you have.

First, a bit of chess history.

Alonzo Wheeler Jerome published his first gambit analysis in 1874. He tested some of his lines in correspondence play, and in 1876 he played a correspondence match against Lt. G.N. Whistler, USA, Secretary, Lexington Kentucky Chess Club. I have found only 1 of their games, but it appears that Whistler did very well.

Whistler played 7...Qe7, like in your game, and Jerome took the rook with 8.Qxh8 - very risky.

Your opponent had the right idea, with 8...Qxe4+ through 12...Qxf3+. Then he decided to go for the draw.

It is hard to blame him. He had decided that you knew a powerful gambit that he did not. It had to be powerful, because nobody would sacrifice two pieces for "nothing", right? A draw would be an honorable outcome, under the circumstances.

What your opponent missed was 13...d5!, opening the diagonal for his bishop to come to g4 to threaten checkmate.

You could protect the rook a second time with 14.Nc3, but, now 14...Qf1+ 15.Re1 Bg4+ 16.Ne2 Bxe2+ would be mate.

"Best" for White after 13...d5! would have been 14.h3, keeping the enemy bishop off of g4 - but, then 14...Qh1+ 15.Re1 Bg4+ anyway 16.hxg4 Qxh7 wins the queen for him. Awkward.

So, a couple of lessons from your game.  First, Black can often "solve" the Jerome Gambit if he has enough time, but in blitz he usually does not have enough time, as you saw. Second, taking the rook is dangerous for White. Even though he scores better than 50% in the games in my database after taking the rook (complications in blitz), he would do better to play something like 8.Qf4+. 

Thanks for sharing your game.

LegendOfThin - MaxFalke

5 0 blitz, Chess.com, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

The Jerome Gambit can be quite a nasty surprise for a player looking for a "quiet game".

4...Kxf7 5. Nxe5+ Nxe5 6.Qh5+ g6 7.Qxe5 Qe7 

8.Qxh8 

Risky, as noted above.

8...Qxe4+ 9.Kd1 Qg4+ 10.f3 Qxg2 

In the Blackburne Defense, 7...d6 8.Qxh8 the major danger for White is that his Queen will get trapped. In Whistler's Defense - this game - White makes sure that Her Majesty is not locked in; but it is His Majesty who is at risk.

11.Qxh7+ Kf8 12.Re1 Qxf3+  

13.Re2 Qf1+ 

Black can recover from this move, which means that it is not "bad", but this is the first indication that he may have misjudged the position. 13...d5 was/is the move.

14.Re1 Qf3+ 15.Re2 Qf1+  

It was not too late for 15...d5! Perhaps the clock was an issue??

16.Re1 Qf3+ drawn by repetition

I hope Black spent time going over the game, afterward.

Jerome Gambit: Article

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

I recently received  by email the following Jerome Gambit article. Have a pleasure!                                                                        

The new life for A.Jerome’s and D.Mills’s b2-b4 blow!

 

Dear Rick, my dear friend!

 

The Jerome Gambit (JG, 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bf7) is your main chess love, and here is my present for you! Thus, I would like to show my inventions in “a strong theory of this theoretically weak gambit that is very useful for players”. It isn’t necessary to comment the following initial moves: 4.Bf7 Kf7 5.Ne5 Ne5 6.Qh5 Ke6. It isn’t necessary to compare the forces of the way 7.Qf5 Kd6 8.b4 (Way 1) and of the way 7.b4 (Way 2) with their alternatives; I’ll consider these two ways below. But it is necessary to say that some modern experts of JG analyse the very bright game (1899) of the famous chess person Daniel Yarnton Mills (White) and NN (Black)

[1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bf7+ Kf7 5.Ne5+ Ne5 6.Qh5+ Ke6 7.Qf5+ Kd6 8.b4 Bb4 9.c3 Ba5 10.Ba3+ c5 11.Bc5+ Kc5 12.Qe5+ Kb6 13.Qd6+ Kb5 14.a4+ Kc4 15.Qd5#],

and all experts comment its middle without a censure of the moves 8…Bb4 9.c3. Consequently, they evaluate these moves as very good ones, and these their evaluations are mistaken, I’ll prove it below. I suggest the following names to don’t use the names “Way 1” and “Way 2”: Way 1 = Queen’s Jerome-Mills variation, Way 2 = Pawn’s Jerome-Mills variation. Here is a part of my analysis with my inventions:

 

I.                [Queen’s Jerome-Mills variation]

A)   8…Bb4?!

A1) 9.f4!N [White has an enough strong attack.] 9…Ke7! [9…Qf6?? 10.fe! Qe5 11.Qe5 Ke5 12.Bb2 with 13.Bg7: White wins. If 9…Ng6 or 9…Nc6 then 10.Bb2! If 9…Qe7 then 10.Bb2 too. If 9…Qh4 10.g3 Nf3 then 11.Kf2!: White wins.] 10.fe! d6 [10…Nh6 11.Qg5 Ke6 (11…Ke8 12.Qh5!: White attacks. If 12.Qg7? then 12…Qh4!: Black wins.) 12.Qg3!: White attacks.] 11.Qf4! Ke8 [11…de 12.Qe5; 11…Qf8?! 12.Qg5 with 13.Rf1; 11…Nh6 12.Qh4 Ke6 13.Qh3; 11…Be6 12.Bb2: White attacks in all the cases.] 12.Bb2 Qe7 13.0-0 de 14.Be5: White attacks.

I suggest the name “Bona Fide Master attack” for this opening variation 9.f4. (Of course, it is impossible to see here the title “FIDE Master”: there are English words “bona fide” and “master” only.) Also I suggest “Three Directions attack” as the synonym of this name: White pieces’ and pawns’ moves form here three directions of attacking. If White’s pawns go to the north then these exact directions are a north-west one, a north-east one and a north one.

 

A2) 9.c3? Nd3!N 10.Kd1 Qf6!? 11.Qd5 Ke7 12.Qd3 Bc5: Black wins.

B) 8…Bd4!N 9.Nc3 [9.c3? Nd3! 10.Kd1 Nf2 11.Ke2 Nh1 with the idea 12…Ke7: Black wins. If 9.Ba3? then 9…Ba1 10.b5 c5: Black wins.] 9…Bc3 10.dc Qf6: Black wins.

 

II.             [Pawn’s Jerome-Mills variation]

7…Bb4!? [There are some good alternatives, but the fight can finish rapidly nowhere, for   example: 7…Bd4!?N 8.Qh3!] 8.Qf5!

A)   8…Kd6?! – 7.Qf5 Kd6 8.b4 Bb4?! (Queen’s Jerome-Mills variation)

B)    8…Ke7!N 9.Qe5 Kf8: Black wins.

 

It is a new opening theory only. If you think about future practice then it is important to remember that it isn’t very simple for Black to find in blitz the winning return of a piece 8…Ke7! in the Pawn’s Jerome-Mills variation, because Black has accepted all White’s “wild” sacrifices since the 4^th move and feels the growing emotional weakening. And I say the same about the return of a piece 9…Ke7! in the Bona Fide Master attack.

Regards, Yury V. Bukayev, istinayubukayev@yandex.ru .

 

Jerome Gambit: The Punishment is Checkmate

I was very happy to receive the following Jerome Gambit game, with notes by the winner. I have put his comments in blue. I have added a few of my own comments, in black.

AMcclafferty - Bluemagic2222

5 0 blitz, lichess.org, 2020

1.e4 e5 2.Nf3 Bc5

The Busch - Gass Gambit.

3.Bc4

Sidestepping the main line. Chodini's Gambit would continue after 3.Nxe5: 3...Nc6!? 4.Nxc6 dxc6

3...Nc6

I opened with e4, my personal standard, and my opponent replied e5. Whenever I get this opening I always try for some sort of gambit. I developed my knight to f3, my opponent did Bc5. I replied Bc4, and once he played Nc6, I knew it was time for the Jerome Gambit.    Bxf7, initiating the gambit. Kxf7, Nxe5+, giving up the last piece for the gambit, and then Nxe5.

4.Bxf7+

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+

Now that all my material is gone, I proceed with Qh5+, attacking the king and the knight on e5. My opponent plays Ke6, defending both, so I prepare for a check with f4.

6...Ke6 

7.f4 Nf6

My opponent blunders with Nf6, as it allows me to check with my queen by doing Qe5, defended by the pawn.

8.Qxe5+ Kf7

After the king retreats to f7, trying to bring the rook in to e8 by manually castling the king.

9.Qxc5 d6 10.Qc4+

I pick up the undefended bishop on c5 with my queen. He then tried to fend off my queen by playing d6, so I went Qc4+ to attack his king and return my queen to a safe square. (Black could've played d5 to stop the check, as he would have 2 defenders and I have 2 attackers. This move also comes with an attack on the queen.)

10...Kg6 

Another blunder sends his king to g6, where I push f5 with check.

11.f5+ Kh6 12.d3+ g5 

He does not do the best move of capturing with the bishop, but plays Kh6, which makes the king really unsafe. There is a line that would've had me promote my f pawn after Qf7, with an eventual queen sacrifice, but I did not see that during my game. Anyways, d3+, a discovered check from the bishop, then ..g5.

13.h4 Rg8

I try to attack the pinned pawn on g5 by playing h4. Black cannot capture h4 because of the pin, so he defends with Rg8. Stockfish says this gives white mate in 3 but as I am only rated around 1200 or so I couldn't see that, maybe someone else can give it a go as a puzzle here: https://imgur.com/a/sGNBn5k

Stockfish suggested 14.Qf7 Nh5 15.hxg5+ Rxg5 16.Rxh5# - Rick

14.hxg5+

After the rook move, I played hxg5+, forking the king and knight, with a double check from my h1 rook. He cannot recapture the pawn with anything, so the king is forced back to g7.

14...Kg7 

15.gxf6+ Kxf6

After Kg7, I captured on f6 with my g pawn, with a check on the black king, simply winning material. Qxf6 is the best move for black, making the piece active and gaining a pawn. However, my opponent played Kxf6, which leads to M11 (which I didn't see but we're not gonna talk about that).

The mate in 11 suggested by Stockfish is ridiculous: 16.Rxh7 Qe8 17.Nc3 Bxf5 18.Nd5+ Kg6 19.Qxc7 Bd7 20.Qxd6+ Qe6 21.Rh6+ Kf7 22.Rxe6 Bxe6 23.Qe7+ Kg6 24.Qxe6+ Kg7 25.Qf6+ Kh7 26.Qh6# AMcclafferty was playing a blitz game, and his practical choice of moves was to be preferred - Rick

16.Rh6+

I decided to play Rh6+, to try to make a checkmate. Stockfish says white is up 77 pawns, which is the highest I've ever seen, and I just thought it was cool.

16...Ke7 17.Rxh7+

After I moved my rook, he retreated his king to e7, Allowing my bishop to come into play, if I decided to. I thought this would win a queen, but forgot the rook on g8. It is still a recommended line but it leads to a slower checkmate than the move I did, which led to a mate in 2. I played Rxh7+, and after Kf6, I played Qd4. And it was in this position that white checkmated black.

17... Kf6 18.Qd4 checkmate

Jerome Gambit: Study This Game

One way of learning the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) is to go beyond the opening moves and take a good look at middlegame structures, and the attacks that come out of them. The following game is worth playing over and over, to catch the ideas that underly the attack. Both attack and defense can be improved - but, that is the point: the more you study the game, the more you will understand.

By the way, the game arrived with the following encouraging note 

I've been experimenting with the Jerome Gambit in a few anon games on lichess.com, and this one in particular led to a pretty nasty attack and checkmate. I thought you would enjoy this game. I'm going to keep playing it until I see someone defend against it well.

Anonymous - Anonymous

5 3 blitz, lichess.org, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 

The Jerome Defense to the Jerome Gambit, played at least as early as Jaeger, D - Jerome, A.W., correspondence, 1880, but already suggested in Jerome's 1874 analysis in the Dubuque Chess Journal.

7.Qxe5 d6 8.Qg3 Qf6 

9.Nc3 Be6 10.d3 h6 11.O-O Ne7 

12.Kh1 Kf7 13.f4 Rhf8 14.Bd2 Kg8 

Black is keeping pace with White, and still holds his extra piece for two extra pawns. He has castled-by-hand, although in this case it provides less security than expected.

White now begins his Kingside attack.

15.f5 Bd7 16.Rf4 Rf7 17.Rh4 Kh8 18.Rf1 

White could also have brought his Bishop into the attack with 18.Bg5. Komodo 10 suggests that the only way Black could keep his edge would be to return his piece (for 2 pawns) with 18...Nxf5, or 18...Qe5 19.Bf4 Nxf5. The problem with 18...Qd4 is 19.Bxh6 and an even game (although Black has to see to his defense).

18...b5

A sharp distraction.

19.Qh3 Kh7 

Black protects his h-pawn, but he might have backed away, instead, with 19...Kg8.

20.Rg4 

Consistent, but 20.g4!? would have been sharper.

20...Ng8 

It was time to believe in his counter and try 20...b4 21.Nd1 d5 when he would probably be better in a complicated situation.

21.Nd5 Qxb2

Looking for safety for his Queen, at a distance, but 21...Qe5 was the way to keep an edge.

22.Bc3 

The last piece in White's attack.

22...Qxc2 23.Qh5 Raf8 24.Qg6+ Kh8 25.Bxg7+ Rxg7 26.Qxg7 checkmate

Jerome Gambit: An Exchange of Emails

Recently I had a nice email exchange with a Reader.

I’ve have been following your blog for a while now, so I considered myself prepared to deal with most lines within the Jerome. To my shock, my opponent proved me wrong with the Jerome’s Gambit declined. After the game, he told me that he opted to go for this line since it avoided the tricky positions of Jerome’s Gambit Accepted.

It lead to a simple open position, with white having a slight advantage. I would love to hear your thoughts on this.

I was happy to respond.

The Jerome Gambit [declined] is rare, but it provides and interesting challenge to White, what to do when the defender doesn't want a "won" game by accepting a ton of material - starting with the bishop - and instead chooses to sacrifice a pawn (and his castling rights) to get out of White's plans.

My database (mostly online games by average club players) has 330 games with 4...Kf8, with White scoring 56%. This always requires interpretation, because The Database has 15,220 games with 4...Kxf7, with White scoring 46%. So, from a practical point of view, although the Jerome Gambit Declined hasn't scored impressively for the attacker, it has improved his results.

There are three general responses to 4...Kf8, and there is not a lot of practical experience to suggest a choice, it's more a question of personal preference (so it is worth having a response prepared).

Simplest is 5.Bxg8, getting rid of the bishop. It scores well (59%) but it is an exchange of a piece that moves 3 times for a piece that hasn't moved at all (although Black will have to use up a move to recapture). Also, that bishop can be quite useful if it's still on the board.

Withdrawing the bishop to d5 (67%), c4 (52%), or b3 (61%) keeps it alive, but, again, it's taken 3 moves to get settled. The compensation is a pawn and Black's king's lack of castling power. 

Finally, there is the let's-stir-things-up-further 5.Nxe5, which scored only 50%, but which certainly provides Black with many ways to go wrong.

Komodo 10, at 28 ply, prefers 5.Bb3 by 2/100ths of a pawn (!) over 5.Bd5 and rates White to be about 1 1/2 pawns better. (I suppose that means that it considers a displaced king as 1/2 of a pawn of liability. Interesting.)

My preference has been 5.Bb3. I am not convinced by 5.Bd5, as the bishop is immediately hit by 5...Nf6, and if I had wanted to exchange pieces I would have done it by 5.Bxg8. Also, the "threat" of 6.Bxc6 bxc6 7.Nxe5 is not very strong, as White's e-pawn will be at risk, too.

I haven't studied 5.Nxe5 enough, but, on the surface, it has the benefit of continuing along regular Jerome Gambit lines, and if Black ever captures the bishop, then the game has transposed, with Black a move down. The problem, however, is that after 5...Nxe5, if White continues with the normal 6.d4, looking for transposition, Black has 6...Bxd4 7.Qxd4 Nxf7, and Black seems to have improved his position above normal lines. I have only one game with 7...Nxf7, a win for Black.

In your game, your opponent was able to get his knight to capture at e5, but it was too late, as your bishop absconded to b3. After 7...Qe7, things looked quite messy for White, but there is no question that he was better, as you demonstrated.

I liked that you focused on castling and piece development. What was the time control of the game? Was it at lichess.org?

After 12...d6, material was even, and you had a slight development advantage. His king was no safer - I like that he then castled-by-hand.

You handled the tactics that followed well. Exchanging your bishop for his knight was a good idea - the pawn on g5 was weak, and you avoided a bishops-of-opposite-colors endgame, which is notoriously drawn. When his c7 pawn fell, it was clear that you were much better.

Very solid game, especially given that you were surprised by 4...Kf8. Thank you for sharing.

Here is the game.

Rao, Bradley - Anonymous

Chess.com, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kf8 5.Nxe5 Nf6 

A recent game showed Black capturing the Knight: 5... Nxe5 6.Qh5 Qf6 7.f3 Qxf7 8.Qxe5 d6 9.Qc3 Nf6 10.d4 Bb6 11.a4 a6 12.Na3 Bd7 13.Nc4 Ba7 14.Bg5 h6 15.Bh4 g5 16.Bg3 Kg7 17.e5 dxe5 18.Bxe5 Rhe8 19.O-O-O Kg8 20.Ne3 Bc6 21.Ng4 Nxg4 22.fxg4 Bxg2 23.Rhg1 Be4 24.Rgf1 Qe6 25.Qh3 Rad8 26.Rf6 Qc4 27.c3 Bxd4 28.Bxd4 Rxd4 29.Rxd4 White won on time, ianfencer - NathanKelly, 1 0 blitz, lichess.org, 2020) 

6.d4 Nxe5 7.Bb3 Qe7 8.dxc5 h6 9.O-O Nxe4 

White is about to lose his pawn advantage, but Black's awkwardly placed King and Queen give the first player the advantage, which would be emphasized now by 10.Re1.

10.Be3 Nxc5 11.Nc3 Nxb3 12.axb3 d6 13.h3 Kg8 14.Qd5+ Kh7 15.Nb5 Rf8 16.Rfe1 a6 

White did not capture the a-pawn directly, so Black decided to defend it. The defender has castled-by-hand, and the game looks about even.

17.f4 Ng6 18.Bd2 Qf7 19.Qxf7 Rxf7 20.Re8 Nh4 21.Nc3 b6 22.Be1 Ng6 23.Bd2 Nh4 24.Kf2 Bb7 25.Rxa8 Bxa8 

26.g3 Nf3 27.Rxa6 Bc6 28.Be3 Ng5 29.g4 Nxh3+ 30.Kg3 Ng5 31.Ra7 Ne6 

32.f5 Ng5 33.Bxg5 hxg5 34.b4 Bh1 

A slip, allowing the win of a pawn.

35.Nb5 Bc6 36.Rxc7 Rxc7 37.Nxc7 Kh6 

White is a pawn up, but Komodo 10 evaluated the position as him being more than the equivalent of a Rook ahead. Why is that? Black's problem was that his pawns were all isolated and easy targets for the Knight. At the same time, Black's King could not leave the Kingside, so White's King could become more mobile.

What follows is a nice, technical win. 

38.c4 Bd7 39.b5 g6 40.f6 

Another problem: a passed pawn.

40...Kh7 41.Nd5 Kg8 42.Nxb6 Be6 43.Nd5 Kf7 44.b6 Bc8 45.Kf3 

White's King prepares to join the party.

45...Ba6 46.Ke4 Bb7 47.Kd4 Bc6 48.Kd3 Ba8 49.Nc7 Bc6 50.Nb5 Kxf6 51.Nxd6 Ke7

 

52.b7 Bxb7 53.Nxb7 Kd7 54.Nc5+ Kd6 55.Ne4+ Kc6 56.Kd4 Kb7 57.b4 Kc7 58.b5 Kb6 59.Kd5 Ka5 60.Kc5 Ka4 61.b6 Kb3 62.b7 Kb2 63.b8=Q+ Kc2 64.Kd5 Kc1 65.c5 Kc2 66.c6 Kc1 67.c7 Kc2 68.Qb4 Kc1 69.c8=Q+ Kd1 70.Qd2 checkmate

Jerome Gambit: Help With Studies

It should come as no surprise that the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) doesn't always win. Readers of this blog usually send me their wins, but sometimes those wins are with Black.

Paolo De Santis recently sent me one of his games, noting "After Queen h5 I didn't remember the best move but I knew surely that the king must move to the center and not back. Finally I think White didn't play aggressive as the opening requests. I hope this game will help your studies."

I appreciate the help. Just like I enjoy answering the question "How did White win?" I find it educational to answer the question "How did White lose?" 

SayOne9 - Desa96

10 5 blitz, lichess.org, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 

7.Nc3 

A natural move. Checking The Database, I see that it is relatively rare, with White scoring 5 - 6 - 1 for 46%. It is a solid developing move, and White is ready to kick the enemy Queen with Nd5, should she come, unprepared to f6; but 7.Nc4 is not very forcing. 

In comparison, The Database has 553 games with 7.f4, with White scoring 63%. The game immediately sharpens, as the first player wins back a piece, sometimes at the cost of not being able to castle Kingside.

The Database also has 550 games with 7.Qf5+, with White scoring 50%. Again, White is pushing the tempo of things.

7...Nf6 

Interesting. Another natural move. Probably better was 7...d6, holding onto the second extra piece.

8.Qh3+ 

White had some interesting alternatives.

He could have tried 8.Qf5+ Kf7 9.Qxe5 winning the Knight, but he had to be prepared for 9...Bxf2+!? (a novelty, not seen in the two relevant games in The Database), clawing back a pawn and forcing White's King to move, as 10.Kxf2 would be met by 10...Ng4+, forking the King and Queen.

Stockfish 11 prefers the retro move 8.Qd1, another novelty. It explores one wild line, 8...Bb6 9.d4 Ng6 10.e5 Ng8 11.h4 d5 12.h5 Nge7 13.g4, but, as much as I want to root for the pawns, Black is still up a couple of pieces. The same goes for 8...Bd4 9.Ne2 Bb6 10.d4 Nf7 11.e5 Ng8.

8...Kf7 9.d4 

White has to try something.

9...Bxd4 10.Bf4 Re8 11.Nb5 Bxb2 12.Rd1 Nc6 

White is working on his development, but his opponent has too many pieces.

13.Bg5 Kg8 14.O-O Rxe4 15.Nc3 Rc4 16.Nd5 Rxc2 17.Qf3 Qf8

 

18.Nxf6+ gxf6 19.Bxf6 Bxf6 20.Qg3+ 

Instead, 20.Qb3+ Qf7 21.Qxc2 would win a Rook. Interestingly, Stockfish 11 still rates Black in that position to be about a Queen ahead!

20...Bg7 21.Qxc7 d6 22.Rxd6 Bd4 

23.Rd1 Qxf2+ 24.Kh1 Bh3 25.Rd3 Qxg2 checkmate

Okay, that was helpful in studying the Jerome Gambit, even if it was a loss.

Jerome Gambit: Against A Decent Sparring Partner

Playing the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) against a top level computer at its highest rating would be a recipe for disaster. However, finding the right program at the right level of play means a decent sparring partner, and an enjoyable game. Here is an example, with another one in the notes.

carlopatti - Computer Level 6

Chess.com, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ g6 

(6...Ke6 7.Qf5+ Kd6 8.f4 Qe7 9.d3 Nh6 10.Qxe5+ Qxe5 11.fxe5+ Kxe5 12.Rf1 Ke6 13.Nc3 Rf8 14.Nd5 Rxf1+ 15.Kxf1 Bd6 16.Bf4 b6 17.e5 Bxe5 18.Bxe5 Kxe5 19.Nxc7 Rb8 20.Re1+ Kd6 21.Ne8+ Kc5 22.Re5+ Kc6 23.Nxg7 Bb7 24.c4 Rg8 25.Nh5 Rh8 26.d4 a5 27.d5+ Kc5 28.b3 Ba6 29.Nf6 Kd6 30.Re4 Bc8 31.h4 Ba6 32.g4 Rb8 33.g5 Rf8 34.Ke2 b5 35.Nxh7 Rf7 36.Nf6 Rxf6 37.gxf6 Kc5 38.Kd3 a4 39.b4+ Kxb4 40.cxb5+ Kxb5 41.Kd4 Kb6 42.Re7 Nf5+ 43.Ke4 Nd6+ 44.Ke5 Kc5 45.h5 Bd3 46.Rxd7 Be2 47.h6 Nc4+ 48.Kf4 Nb6 49.Re7 Kc4 50.Rxe2 Nd7 51.f7 Nf8 52.Re8 Nd7 53.f8=Q Kxd5 54.Qe7 Nf6 55.Qe5+ Kc4 56.Rc8+ Kb4 57.Qc5 checkmate, carlopatti - Computer Level 6, Chess.com, 2020) 

7.Qxe5 Nf6 

When Black plays 6...g6 as part of a plan, he is ready to sacrfice his Rook after either 7.Qxe5 d6 or 7.Qxe5 Qe7. When he plays 6...g6 as a knee-jerk reaction to White's Queen check, he winds up protecting the Rook in this way, but dropping his Bishop.

8.Qxc5 Nxe4 

Yes. The computer risks 9.Qd5+ Kg7 10.Qxe4 because of 10...Re8, pinning and winning the Queen. Beware the e-file!

9.Qc4+ d5 10.Qd4 Ng5 11.O-O Bf5 12.d3 c5 

An interesting idea to exchange c-pawns, but the computer has not looked deep enough.

13.Qxc5 Rc8 14.Qxa7 Ne6 15.Na3 Rc7 

16.Nb5 Rc5 17.Qxb7+ Kf6 18.b4 Rc8 19.c4 Rf8 20.cxd5 Rc2

 

Black's Rook finally gets to c2 - without a pawn capture. It keeps White's Bishop off of b2, but the move costs material.

21.dxe6 Bxe6 22.Bh6 

White keeps coming with threats. Even a computer respects that.

22...Rg8 23.Rae1 Bc8 

Attempts at defense fail.

24.Qf3+ Bf5 25.Re3 Rc8 26.Rfe1 Qd7 27.Qf4 g5 28.Re6+ Qxe6 29.Bxg5+ Rxg5 30.Rxe6+ Kf7 31.Qxg5 Kxe6 32.Nd4+ Kd5 33.Qxf5+ Kxd4 34.Qxc8 

The smoke has cleared. The computer hangs on to the bitter end.

34...h6 35.b5 h5 36.b6 h4 37.b7 Ke5 38.b8=Q+ Kf6 39.Qb5 h3 40.Qbf5+ Kg7 41.Qcf8 checkmate