The Winning Part of the Same Jerome Gambit – 4.c3 Nf6 5.0-0 Nxe4 6.b4 Nxf2 7.Bxf7+! (Part 2)

 

The Winning Part of the Same Jerome Gambit – 4.c3 Nf6  

5.0-0 Nxe4 6.b4 Nxf2 7.Bxf7+! (Part 2)   

  

(by Yury V. Bukayev) 

 

 

In this part of my new analytical research I’ll focus with the help of my new inventions on the nature of the move 7.Bxf7+: it is enough important to understand, is it a true gambit, or a true pseudogambit (like the standard system of the Queen’s “gambit” – 1.d4 d5 2.c4), or something other, in fact. Thus, this part of my new research is also a large development of my other analytical research ‘Lose Never with a Strong Deferred Jerome Gambit! (Part 3)’ (it was published in January 16, 2023, on Rick Kennedy’s blog). 

 

For a lot of modern experts, the term “pseudogambit” is unnecessary, so they name 1.d4 d5 2.c4 as a usual gambit, and they are ready to name 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.0-0 Nxe4 6.b4 Nxf2 7.Bxf7+! as a usual gambit too. Let’s not prevent them to do it. But, in fact, the following much more detailed approach can be created and used. 

 

According to my definition of a true pseudogambit, the standard system of the Queen’s gambit is a true pseudogambit, because: 

1) after the acceptance 2…dxc4 White can regain the material by the direct attack - 3.Qa4+ Nc6 4.e3 Be6 5.Bxc4  

and 

2) since White’s next move (the 4th move) after his start of this attack White’s other ways aren’t better than this attack, for example: 5.Qb5?! Rb8 6.Bxc4 a6 isn’t better for White, 5.Na3? a6 with 6…b5, 5.Nc3? a6! 6.Qd1 Na5 or 6…Nf6, 4.Nf3?! Bg4 5.Ne5?! Qxd4 6.Nxc6 Qd7 7.Qxc4 Qxc6! 8.Qxc6 bxc6.  

 

Further, we can consider 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.c3 Nf6 5.0-0!? (It is a gambit, of course.) 5…Nxe4 6.b4!? Nxf2!? (I have considered it in the Part 1.) 7.Bxf7+!. Thus, let’s consider my new inventions after the acceptance – 7…Kxf7. 

 

After 8.Qb3+ Ke8 White has two good ways (9.d4 Be7 10.Rxf2 and 9.bxc5), both of them lead to White’s advantage. Only one of them – 9.bxc5 – is a direct attack. It is only an illusion that the direct attack is finished. And after 9…Nd3 10.Qc4 Nxc1 the continuation of the direct attack – 11.Rxc1 – is worse than the other way – the gambit way 11.Na3!!. (Moreover, the gambit 10.Ne1!? Nf4 11.d4 Ne2+ 12.Kh1 Rf8 13.Nf3 is, it maybe, a little stronger than 10.Qc4.) 

 

Thus, after 10.Qc4 Nxc1 on the way 11.Rxc1 d5! 12.cxd6 cxd6! White has enough compensation, but not more, probably. Alternatively, on the way 11.Na3!! Nxa2?! (Black has a Bishop and two pawns up this moment) White plays 12.Nb5!! with a very strong attack. After 11.Na3!! the best response 11…d5! 12.cxd6 Qxd6 13.Nb5 Qd3 14.Qc5! Ne2+ 15.Kh1 Qd7! doesn’t lead to enough good defence: after 16.Rae1 White attacks and stands better. 

 

That is why 7.Bxf7+! isn’t a true pseudogambit, in fact. But what is this 7th move? Due to the gambit 11.Na3!! and due to some White’s gambits after 7…Kf8 (please, look at my Part 1 of this research), it is right to say that 7.Bxf7+! is, according to my new term, a “protogambit” - a protosacrifice which is a source of several winning gambits. 

 

Once again, the Jerome gambit (JG) isn’t 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ only, it is also a large family of deferred (not of relative) systems with Bxf7+ which are the parts of JG. And the above part of JG is, probably, the strongest and the most important for practice: the probability of Black’s move 6…Nxf2 in practice is enough high.  

 

Thus, my previous research and this my research are a start of the golden era of JG in chess opening theory and practice. 

 

 

 

Contact the author:  istinayubukayev@yandex.ru  

 

 

© 2023 Yury V. Bukayev (Copyright © Bukayev Yury Vyacheslavovich 2023). All rights reserved.  

[A legal using of this investigation with a reference to it is permitted  

and doesn’t require author’s consent.] 

 

Jerome Gambit: Puzzles

If you enjoy improving your tactical skills by completing chess puzzles, lichess.org has a large collection of them (see "Puzzles by openings") including 116 Italian Game: Jerome Gambit puzzles, based on games played at that website.

I was astonished to see that 552,511 games starting with 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ have been played at lichess. (White scores 49.5%) That is over 20 times the number of like games that I have in The Database.

Alas, there does not seem to be any easy way to download that half-million-game collection...

Blackburne Shilling Jerome Gambit: Tactical Finish

You can play the most sound, or the least reputable openings, but sometimes it just comes down to tactics.

Longtime blog contributor angelcamina shows how it is done.

angelcamina - Mitay93

1 0 bullet, lichess.org, 2023

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4

The Blackburne Shilling Gambit. 

4.Bxf7+ 

The Blackburne Shilling Jerome Gambit.

4...Kxf7 5.Nxe5+ Ke8 6.Qh5+ g6  

Not 6...Ke7 7.Qf7+ Kd6 8.Nc4+ Kc6 9.Qd5 checkmate, angelcamina - umutkaraca09, 1 0 bullet, lichess.org, 2019. 

7.Nxg6 hxg6 

Instead, 7... Nxc2+ should only lead to an even game 8.Kd1 Nxa1 9.Nxh8+ Ke7 10.Qf7+ Kd6 11.d4 Kc6 12.Qd5+ Kb6 13.Nc3 c6 14.Qb3+ Kc7 15.Bf4+ d6 16.Qf7+ Ne7 17.e5 d5 18.e6+ Kb6 19.Na4+ Ka5 20.b3 b5 21.Bd2+ Ka6 22.Nc5+ Kb6 23.Qf4 Ng6 24.Qe3 Nxh8 25.Qc3 Bxc5 26.Qa5+ Kb7 27.Qxd8 Bb6 28.Qe7+ Ka6 29.Qxh7 Bb7 30.e7 Black resigned, angelcamina - eloali, 1 0 bullet, lichess.org, 2019.

The counter-attack 7...Nf6 is not enough, e.g. 8.Qe5+ Ne6 9.Nxh8 Bg7 10.Qf5 Bxh8 11.e5 Nd5 12.Qxh7 Bxe5 13.Qg8+ Nf8 14.f4 Nxf4 15.O-O Ne2+ 16.Kh1 Qe7 17.d4 Bxd4 18.Bg5 Ng3+ 19.hxg3 White won on time, angelcamina - Skhokho1507, 1 0 bullet, lichess.org, 2019.

Also insufficient: 7...Qf6 8.Nxh8+ Ke7 9.e5 Nxc2+ 10.Kd1 Qxf2 11.Qf7+ Kd8 12.Qxf2 Black resigned, angelcamina - felix_paton, 1 0, bullet, lichess.org, 2019.

8.Qxh8 Nf6 

Possibly a mouse slip: 8...Ke7 9.Qxd4 Ke8 10.O-O Be7 11.f4 Nf6 12.e5 Ng4 13.f5 b6 14.Qxg4 gxf5 15.Qg6+ Kf8 16.Rxf5+ Bf6 17.Rxf6+ Ke7 18.Rf7+ Ke8 19.Qg8 checkmate, angelcamina - aldiardiansyah, 1 0 bullet, lichess.org, 2019 

9.O-O

Better than 9.Kd1 d5 10.e5 Nd7 11.c3 Nc6 12.e6 Nf6 13.Re1 Qe7 14.d3 b6 15.Bg5 Bb7 16.Bxf6 Qd6 17.e7 Nxe7 18. Bxe7 Qxe7 19.Rxe7+ Kxe7 20.Qe5+ Kd7 21.Kc2 Bd6 22.Qg7+ Kc6 23.Nd2 d4 24.cxd4 Rf8 25.f3 Rf5  26.Ne4 Rd5 27.Nxd6 Rxd6 28.Rc1 Ba6 29.Kd2+ Kb7 30.Qxc7+ White won on time, angelcamina - shahramkhoshseffat, 1 0 bullet, lichess.org, 2019) 

9...Nxc2 

White can afford to offer the Rook.

10.e5 Nd5 11.d4 Nxa1 12.Bh6 Qe7 

13.Nd2

The correct Knight move was 13.Nc3, but at bullet speed there are plenty of slips ahead for both sides.

13...Nc2 14.Ne4 Nxd4 15.f4 Nf5 16.Bg5 

A core bullet recommendation: When in doubt, make a threat.

16...Qf7 17.Rd1 c6 18.Rxd5 

Why is White doing this?

18...cxd5 19.Nf6+ Kd8 20.Nxd5+ Ke8 21.Nc7 checkmate

Jerome Gambit: A Real Battle (Part 4)

 

[continued from the previous post]

perrypawnpusher - graintrader69

3 days/move, "Giuoco Piano Game", Chess.com, 2022-2023

35.c3 Nxe7 

Black captured the most advanced passed pawn, but this left his Knight pinned to the Bishop. In the meantime, White's other passers were able to advance.

36.g4 Rd8 37.g5+ Kg6 38. Rxe7 Rxd6 39. Rxe8 Rxd3 

40.Kf2 Rd2+ 41.Re2 Rd3 

Time for the Rook and pawns to work together.

42.Re6+ Kf5 43.Rf6+ Kg4 44.g6 Rd8 45.g7 Black resigned

The wrap-up would be 45...Rg8 46.Rf7 followed by the advance of White's f-pawn.

And now I wait for the final game in the Group and Round to finish, to see if there is a place forme in Round 5.

Jerome Gambit: A Real Battle (Part 3)

 

[continued from the previous post]

perrypawnpusher - graintrader69

3 days/move, "Giuoco Piano Game", Chess.com, 2022-2023

19.Rfe1 Kh7 

Black's best move was the most direct - 19...Re8 to blockade the advanced e-pawn. It would still leave him with the problem of his locked-in Rook on h8, but the game would remain in balance while he sorted that out. 

White could even follow one of Stockfish 15.1's suggested grab-the-draw-and-run lines that it often seems to be finding, since according to the computer a draw is all that White "deserves" in the Jerome Gambit... Anyhow: 19...Re8 20.Ne4 Nd5 21.R3e2 Nf4 22.Re3 Nd5 23.R3e2, etc. draw

The text move allowed Black to cover the enemy pawn's Queening square three times. However, his minor pieces were troubled.

20.Rf3 g5 21.hxg5 

Stronger would have been 21.Ne4 directly.

21...hxg5 22.Ne4 Kg6 

23.Nd6 Be8 

Minor pieces are usually better blockaders than Rooks, but in this particular case the square f8 quickly became a problem for the defender - something not anticipated 4 moves earlier.

Stockfish 15.1's recommendation, instead, was 23...Bd5, although a transition to a simple endgame would ensue: 24.Rxf4 gxf4 25.e8=Q+ Rhxe8 26.Rxe8 Rxe8 27.Nxe8 Bxa2 28.Nd6 and White would be much better.  

24.g3 Nd5 25.Rf8 Kg7 

26.Rf5 

Chasing a pawn. Instead, White had three sharp moves in a row: 26.Nf5+ Kh7 27.c4 Nc7 28.Kg2 and the threat of Rh1 would be decisive, e.g. 28...Bh5 29.g4 Raxf8 30.exf8/Q Rxf8 31.gxh5 Rxf5 32.Re7+ Kh6 33.Rxc7 Kxh5 34.Rxb7. This long line should not have been hard for me to find.

26...Kg6 27.Re6+ Kh5 28.Ree5 

Consistent, although 28.Rf8 had more bite.

28...Rg8 29.Ne4 

Again, okay, but either 29.f4 or 29.Rf8 were better.

29...Kh6 

Black continued to hang on. Here 29...Bg6 was more annoying to White.

30.Rxg5

Dissipating most of the advantage. Best was 30.Rf8.

30...Rxg5 31.Nxg5 Kg6 

Things would have leveled out after 31...Nxe7 32.Rxe7 Kxg5 33.Rxb7.

32.f4 Kf6 33.Ne4+ Kf7 34.Nd6+ Kf6 

After some back-and-forth, White's advantage is clear - three connected passed pawns outweigh a piece.

[to be continued]

Jerome Gambit: A Real Battle (Part 2)

 

[continued from previous post]

perrypawnpusher - graintrader69

3 days/move, "Giuoco Piano Game", Chess.com, 2022-2023

Of course, 9.Qxc7, instead of 9.Nc3 as played in the game, would be suicidal because of 9...Qxe4+.

The alternative, 9.d3 can transpose. See perrypawnpusher - frencheng, 10 5 blitz, FICS, 2010 (1/2-1/2, 31).

 9...c6 

Instead, 9...d6 10.0-0 was seen in perrypawnpusher - ERICOLSON, 10 0 blitz, FICS, 2007 (1-0, 33) and perrypawnpusher - jonathankochems, 2 12 blitz, FICS, 2010 (1-0, 39).

10.d3 d6 11.O-O 

Deviating from Jerome's 11.h3 against Jaeger in their two 1880 correspondence games.

11...h6 12.Be3

For lack of another idea.

12...Bb6

Exchanging Bishops on e3 was probably a better idea, if only because Black does so a few moves later, so the text looks like a lost tempo. Nonetheless, Black remains better.

13.Rae1 Be6 14.h4

Played to prevent ...g7-g5.

More dynamic would have been 14.Bxb6 axb6 15.Nd5!? (a move I never thought of during the game) although after 15...Qd8!? 16.Nxf6 gxf6 17.e5 dxe5 18.Rxe5 Bf7 the open e-file against Black's King would still not be enough to give White an advantage.

14...Bxe3 15.Rxe3 Kg8 16.e5

Black's King has stepped away from the pin on his Knight. He has a plan to counter-attack, but he would have done better to simply contest the e-file, i.e. 16...dxe5 17.Qxe5 Re8 18.Rfe1 Qd7.

16...Nh5 17.exd6 Nxf4 18.dxe7 Bf7

This is one of those odd Jerome Gambit positions that are objectively (i.e. according to Stockfish 15.1, after the game was concluded) equal (0.00 at 40 ply) and that challenge White's assessment of his play so far. 

The first player has gone from 2 pieces down to an equal game - should he be happy at regaining the balance?

On the other hand, the game now has little chance for a checkmate attack, so shouldn't that bring on a sense of disappointment? 

My sense was that I still had 3 pawns for Black's extra piece, and one of those pawns was passed, on the 7th rank. In addition, Black's minor pieces looked a bit awkwardly placed.

These might not account for much in a master vs master game, but in club play, they were still things that could be worked with.

[to be continued]

Jerome Gambit: A Real Battle (Part 1)

The following Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) win might - or might not - be enough for me to advance to the 5th round of the current "Giuoco Piano Game" tournament at Chess.com.

When the game was completed, I submitted it for a "Game Review" by the computer-based "Coach" at Chess.com. It's first assessment was supportive

Sharp - That was a real battle - but you earned the win!

At the end of the Review, the Coach was even more energetic

You really outplayed your opponent in that one. Both of you played an amazing opening. The middlegame battle was fairly even. You outmaneuvered your opponent in the endgame.

Thanks, Coach.

I suppose I did "outplay" my opponent, if that means I made a lot of mistakes, but he made a few more than me. (I do not know if graintrader69 has ever played or faced the Jerome before.)

Of course, the opening was "amazing" - it was a Jerome Gambit.

I am not sure how "even" the middlegame battle actually was. (Time for a closer examination)

The endgame was kind of cool, though.

Let's take a look.

perrypawnpusher - graintrader69

3 days/move, "Giuoco Piano Game", Chess.com, 2022 - 2023

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

The Coach's comment on this sacrifice was surprising.

Interesting move. Not the best but it has some good ideas.

Looking at an earlier game, the Coach had been more direct

You are losing material this way.

Well, yes. And there was more to come - or go.

4...Kxf7 5.Nxe5+ 

Again, the Coach was surprisingly supportive.

Nice! Definitely the right move.

Okay. 

5...Nxe5 6.Qh5+ Kf8 

This move earned an "excellent" from the Coach, although 6...Ke6 was seen as "best".

Not surprisingly, after the game Stockfish 15.1 (a relative of the Coach) at 30 ply evaluated 6...Ke6 about 2/3 of a pawn better than 6...Kf8.

Interestingly enough, a peek at The Database does not support this judgement, however. In the 2,100 games where Black played 6...Kf8, he scored 51%; while in the 3,232 games where Black played 6...Ke6, he scored 45%.

(Personally, with White I have scored 76% in 41 games against 6...Kf8, and 85% in 95 games against 6...Ke6. YMMV.)

7.Qxe5 Qe7 8.Qf4+ 

Before I finish with the Coach's post-game comments, I want to point out that it preferred exchanging Queens on e7. That seems contrary to the attacking ideas of the Jerome Gambit. (For what it's worth, I have never played the exchange.) However, Stockfish 15.1 (at 53 ply) agreed that 8.Qxe7+ was best.

I was surprised to see that The Database agreed, somewhat: 8.Qxe7+ scored 57%, compared to 8.Qf4+ which scored 53%.

8...Nf6 9.Nc3 

Some players new to the Jerome Gambit have early successes, but are puzzled when they turn their games over to computer analysis, only to discover that the silicon beasts do not like the opening.

The idea is to make better use of the attacking opportunities that the Gambit offers than the defender makes use of his opportunities.

[to be continued]