Jerome Gambit Secrets #8

?!?!?

I'll admit that sometimes when I examine "secrets" in the Jerome Gambit - recommended moves that have not, or have barely, seen the light of day, or lines that are obscure - it can seem as if things remain concealed, even after my work. Consider the following.

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Kf8 

Black messes with White's plans by bringing his King to safety, instead of taking a second piece. The Database has 212 games with this position, and White scores 54%. Stockfish 9 sees Black as less than a pawn ahead (depth of search 32 ply).

6.Nxc6 dxc6 7.O-O Bd6 

Black clearly has aggressive intentions, as he points his dark-squared Bishop toward the enemy Kingside.

I was surprised to find only 2 games in The Database with this move, one being perrypawnpusher - Lark, blitz, FICS, 2009 (1-0, 18).

By the way, Stockfish 9's suggested line of play, after a long "thought", instead of the text, is 7...g6 8.d3 Kg7. Recommending simply castling-by-hand in such a fluid position is not a lot of guidance for Black, and certainly should be encouraging for White. 

8.f4

One finesse in the Jerome Gambit that can often test the first player is which pawn to move first, the f-pawn or the d-pawn?

I am pleased to see that jfhumphrey chose the more accurate 8.d4 in his FICS blitz game again kirtz in 2012: 8.d4 Be6 9.e5 Be7 10.f4 Ke8?! 11.f5 Bd5 12.Qh5+ Bf7 13.Qg4 h5 14.Qxg7 Rh6? 15.Bxh6 Black resigned

Of course, I chose the text.

It is maddening to see that if you give Stockfish 9 a lot of time to think - 49 ply! - it suggests 8.d4 for White, and then 8...g6 (blah) for Black.

Certainly a human player is more likely to answer 8.d4 with 8...Qh5!? White should continue with 9.f4, taking advantage of the chance to form a "Jerome pawn" center. He can then counter 9...c5 with 10.c3 and then answer 10...c6 with 11.Qd3. After that, the computer likes 11...Bc7 12.Nd2 Nf6 13.e5 Nd5 14.f5 cxd4 15.cxd4

analysis diagram




White's "Jerome pawns" are on the march and are holding Black's two Bishops in check, at least for now. When White plays Nf3, it will challenge the placement of Black's Queen, after all. The position is dynamically equal.

So, of course, the computer recommends 15...Nb4 16.Qc4 Nd5 17.Qd3 Nb4, etc. with a draw by repetition of position. 

By the way, my game continued

8...g6

Okay, maybe there is something to that move.

9.d4 Bd7

Stockfish 9 prefers 9...Kg7 10.Nc3 Qh4 11.Qd3 Nh6 12.h3 Bd7 with an even game. Much of that should look familiar by now.

10.Nc3

Also playable are 10.e5 and 10.Be3, although I kind of like 10.c4!? - although it might be too much of a good thing.

The game finished up with: 10...Nh6 11.f5 Qh4 12.e5 Nxf5 13.exd6 cxd6 14.g4 Re8 15.gxf5 Bxf5 16.Qf3 Qxd4+ 17.Kh1 Kg7 18.Qf2 Black resigned

Jerome Gambit Secrets #7

Here is another Jerome Gambit line that is worth looking at, even if it is rare, if only to have a sense of how play has gone - or how it should go, if it ever appears again in a game. 

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.d4 Nc4 

Black is 2 pieces ahead, and if he wants to return some material, he has a number of choices. The text is rare method (only 3 game examples in The Database), but both players need to know a bit about what they are committed to.

7.Qh5+

This is probably White's best choice. It is a common Jerome Gambit tactic, and the resulting position is rated as equal by Stockfish 9, at an analysis level of  46 ply. We shall see, however, that in this case the computer's "opinion" is of marginal value.

The game remains complicated after the alternative 7.dxc5, which gets rid of Black's troublesome Bishop and allows White pressure along the d-file, with his advanced c-pawn ready to trouble Black's advancing d-pawn. One game by an experienced Jerome Gambiteer continued: 7...Nf6 8.e5?! (8.b3!? Ne5 9.Nc3 (9.O-O d5 10.cxd6 Qxd6 11.Nc3 -/+) 9...Re8 10.Bb2 -/+) 8...Nxe5 (8...Qe7!?) 9.Bg5 Re8 10.O-O d6 11.cxd6 cxd6 12.Nc3 Bg4 13.f3 Bh5 14.Bxf6 gxf6 15.Qd5+ Kf8 16.Qxb7 Re7 17.Qe4 (17.Qb4) 17...Bg6 (17...Nxf3+!?) 18.Qh4 Rg7 19.Nd5 Rf7?! 20.c3?! (20.f4) 20...a5 21.Rae1 a4?! 22.f4 Nc4? 23.f5 Ne5 24.fxg6 Nxg6 25.Qd4 Ra5 26.b4 (26.Re6!?) 26...Rb5 27.a3 Ne5 28.Rf4 Ng6 29.Rxf6 Rxf6 30.Nxf6 Rf5 31.Re8+ Qxe8 32.Nxe8 Kxe8 33.Qxd6 Ne7 34.b5 Rd5 35.Qb8+ Rd8 36.Qe5 Rd5 37.Qh8+ Kd7 38.b6 Rb5 39.Qd4+ Rd5 40.Qxa4+ Nc6 41.h4 Ra5 42.Qg4+ Kd6 43.a4 Ne5 44.Qb4+ Rc5 45.b7 Nc6 46.b8=Q+ Nxb8 47.Qxb8+ Kd5 48.g4 Kc4 49.Qb4+ Kd5 50.a5 Rc4 51.Qb7+ Rc6 52.a6 Kd6 53.a7 Rxc3 54.Qb8+ Kd5 55.a8=Q+ Kd4 56.Qd8+ Ke3 57.Qe7+ Kd2 58.Qg2+ Kd3 59.Qd6+ Kc4 60.Qgc6+ Kb3 61.Qb5+ Kc2 62.Qh2+ Kd1 63.Qb1+ Rc1 64.Qd6+ Ke2+ 65.Qxc1 Kf3 66.Qd3+ Kxg4 67.Qg5 checkmate, HauntedKnight - jthurman, FICS, 2014.

7... g6

Black can also try 7...Kf8, although it isn't really an improvment - and is equally complicated. One game continued 8.Qxc5+ Nd6 9.e5 b5? (9...Qe7!? is a better try 10.O-O (or 10.Qxc7 Nf5 11.Qc3 d6 12.O-O dxe5 13.dxe5 transposing) 10...Nf5 11.Qxc7 d6 12.Qc3 dxe5 13.dxe5 Bd7 14.Qf3 Qxe5 15.g4 Bb5 16.Nc3 Bxf1 17.Kxf1 Nf6 18.gxf5 Qxh2 19.Bf4 Qh5 (19...Qh4 20.Re1) 20.Qxb7 Re8 21.Qb4+ Re7 22.Kg2 Qg4+ 23.Kf1 Qh3+ 24.Kg1 Qg4+ drawn) 10.exd6 c6 11.Be3 Qa5+ 12.Nd2 Nf6 13.O-O a6 14.b4 Qd8 15.Bg5 h6 16.Bxf6 gxf6 17.Ne4 f5 18.Qxf5+ Kg7 19.Qg4+ Kh7 20.g3 a5 21.Rae1 axb4 22.Qf5+ Kg7 23.Nc5 Rxa2 24.Re7+ Kg8 25.Qf7 checkmate, HauntedKnight - Dpouchy, FICS, 2014.

While computer analysis can sometimes tease out tactical ideas, in this case Stockfish 8 & 9 frustratingly throw in the towel, suggesting 7...Kf8 8.Qf5+ Ke8 9.Qh5+ Kf8 and a draw by repetition. After all, White is two pieces down, so he should be happy with the half point.

8.Qxc5 

This capture allows White to grab the Bishop, as well, without disrupting his pawn center. The move appeared in a recent Bill Wall game, and I am a tiny bit surprised (Bill's games are full of surprises) that he didn't try the "nudge" 8.Qd5+, instead - the kind of twist that shows up in many of his games.

Looking at 8.Qd5+ Kg7, we can see that Black already has to be careful:

8...Kf8? 9.dxc5 Na5 10.Bg5 Nf6 11.Qd4 Kf7 12.e5 Nc6 13.Qc4+ d5 14.cxd6+ Be6 15.Qf4 Nxe5 16.dxc7 Qe7 17.Qxe5; or

8... Kf6? 9.Bg5+; or

8... Ke7? 9.Qxc5+ Kf7 10. Qxc4+; or

8...Ke8? 9.dxc5 Nf6 10.Qxc4. 

The game can continue in a complicated manner toward an advantage for White: 9.dxc5 Na5 10.b4 Nf6 (or 10...Nc6 11.Bb2+ Nf6, transposing) 11.Bb2 Nc6 12.b5 Re8 (or 12...Ne7 13.Qd4 Rf8 14.g4 Kg8 15.Qc4+d5 16.cxd6+ Ned5 17.Nc3 Be6 18.exd5 Bxg4 19.dxc7 Qd6 +/-) 13.bxc6 dxc6 14.Qd3 Qxd3 15.cxd3 b6 16.Nd2 Ba6 17.Rc1 Bb5 18.Nc4 Rad8 19.Ke2 Kf7 20.Bxf6 Kxf6 21.f4 Bxc4 22.Rxc4 b5 23.Rcc1 g5 +/- 

8...d5 9.Nc3 Nf6 10.e5 

Here, Black's game blew up with 10...Ne4? in Wall - Guest6959655, PlayChess.com, 2018 (1-0, 21). The defender could have maintained an even game by giving back material with 10...c6 11.exf6 Re8+ 12.Be3 Nxe3 13.fxe3 Rxe3+ 14.Kd2 Re6 15.Rae1 Rxe1 16.Rxe1 Qxf6.

So - if Black plays the almost "secret" 6...Nc4, smile, but do not celebrate yet. Go for the Queen check at h5, consider the "nudge" at d5, and prepare for complex play where you can hope for an advantage (with a draw in hand, per Stockfish). 

Jerome Gambit: Her Majesty, As She Will

As if sacrificing two pieces was not enough to mark the Jerome Gambit as a seriously suspect opening, White often follows up with early moves of his Queen, prompting many opponents to reflect "Certainly, this cannot be good".

The following game is an enjoyable example. Follow White's Queen, asn she goes where she will...  

Wall, Bill - Guest10755845
PlayChess.com, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.d4 Bxd4 7.Qxd4 Nc6 8.Qd2 

8...Nf6 9.Nc3 d6 10.O-O Bg4 11.b3 Re8 12.Bb2 Kg8 

13.Rae1 Nb4 14.a3 Nc6 15. Nd5 Nxd5 16.exd5 Rxe1 17.Qxe1

17...Ne5 18.f4 Ng6 19.f5 Nh4 20.Qe6+ 

20...Kh8 21.Qh6 

21...Nxf5 22.Rxf5 Bxf5 23.Qxg7 checkmate

Jerome Gambit: King of the Hill

Experienced Jerome Gambit players may well tell themselves "I have seen everything" when it comes to our favorite opening. The following game, however, recently played by "Cliff Hardy" may test that point of view.

I mean, have you ever used the Jerome in a blitz speed "King of the Hill" game? Enjoy. But maybe after a cup of coffee.

Notes are (mostly) by Cliff.

This Jerome Gambit game was played in a Lichess "King of the Hill" tournament ("King of the Hill" is a chess variant where a player wins either with checkmate or by getting their king to one of the 4 central squares - e4, d4, d5 or e5).

Cliff Hardy - NN

King of the Hill, 3 0, Lichess.org, 2018

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

Unfortunately, Stockfish dislikes this move more in "King of the Hill" than in a normal game as it helps Black to get his king towards the centre and it rates this as -3.7 pawn advantage for Black. (Lichess has a function where Stockfish can actually annotate the game, even though it is a "King of the Hill" game)!

4...Kxf7 5.Nxf7+ Nxf7+ 6.Qh5+ g6!

A good defence, though 6...Ke6!, getting the king towards the centre squares, is also strong. Both moves give Black around a -6 advantage, so 6.d4 (avoiding this) was a technically better move.

7.Qxe5 d6 8.Qxh8?

In a normal chess game, White would have a winning advantage in this particular position. Conversely though, this line is actually very strong for Black in King of the Hill (-11) as Black has good chances of getting his king to the centre, so retreating the queen with 8.Qg3 was a much better attempt for White.

8...Qf6

OK (-3.5), but the Blackburnesque 8...Qh4! (-11) was much stronger.

9.Qxh7+??

In a normal chess game, this move would be fine in this position but actually Black has a forced win in 5 moves in "King of the Hill".

9...Ke6!

Black now threatens to win the game on the spot by getting his king to one of the central squares with 10..Ke5!

10.d4 Bxd4??

Black had a forced win in 3 moves, using a brilliant "King of the Hill" tactic here with 10...Qxf2+!! 11.Kxf2 (11.Kd1 Qxd4+! 12. any Ke5 0-1!, as black's king has reached one of the 4 central squares) 11...Bxd4+ 12. any Ke5 0-1!

11.f4

To stop black winning immediately with ...Ke5.

11...d5??

Black should have thought of normal chess and just saved his knight with 11...Ne7 +-.

12.Qxg8+ Kd6 13.Nd2??

We keep being confused by this variant and missing simple moves that work just as well as in a normal chess game - 13.Qxd5+ kept a winning advantage for white here.

13...Qxf4??

14.Nc4+! dxc4 15.Bxf4+ Kc5 16.Qd5+ Kb4 17.a3+ Ka4 18.b3+ cxb3 19.cxb3 mate

(Wow. The game reminds me of a heavyweight boxing match, where one pugilist is behing on points and has only one chance for success - a knockout. In this case - a checkmate. Like I have said before, you can't take "Uncle Jerome" anywhere - even a King of the Hill game - without him causing a disturbance. - Rick)

Jerome Gambit Secrets #6

It is not often that an International Master makes a recommendation in the Jerome Gambit, 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+.

Yet, that is what this post is all about.

Let's take a look at a line of play mentioned in a blog post on this site, 9 years ago, "An International Master Refutes the Jerome Gambit".

You might think from the title of the blog post that the IM is a little bit late to the party - who hasn't refuted the Jerome Gambit?

Actually, IM Gary Lane has been supportive of the Jerome, covering it - with whimsey - in his The Greatest Ever Chess Tricks and Traps (Everyman Chess, 2008) and a couple of times in 2012 in his "Opening Lanes" columns at ChessCafe.com. (I do not think that the Chess Cafe site currently works.)

Let's see some of what he has to say.

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

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 7.f4 d6

I have called this the "annoying defense" (because it is) or the "silicon defense" (because of the affinity computer chess programs have for it). It was first seen in D'Aumiller - A.P., 1878 and figured in six of Alonzo Wheeler Jerome's games against S.A. Charles in their unfinished 1881 correspondence match.

Lane:

I think this is the best way to defend: allowing one of the extra pieces to be taken, and in return obtaining a solid position with extra material.

8.fxe5 dxe5 9.Nc3

Lane, again:

This is the right time for White to offer a draw, but if the offer is declined you should remember that it is frowned upon to cry at the board.

Funny guy - but wait! I finished up that blog post with

I was pleased to see that 9.Nc3 was not in my Jerome Gambit database – but if that is the move IM Lane sees as best for White, I will add it to my repertoire!

So - whatever happened to 9.Nc3  ?

A quick look at The Database (and then, this blog) shows that later in 2009, the Scacchi64.com website held a computer vs computer Jerome Gambit tournament. Comet B48 played the move 9.Nc3 four times, winning twice and losing twice.

Also, Steve Wall played 9.Nc3 once in 2013, while his brother, Bill, played it once in 2015 and once in 2017 - all told, with a win, a draw, and a loss.

A handful of computers and a couple of brothers - that's almost keeping 9.Nc3 a "secret". Here's one of Bill's games, so you can decide what you think for yourself - it's long and complicated, and a Jerome Gambit loss for Bill is pretty rare, so afterwards you might decide you want to keep the line a secret, after all.
  
Wall, Bill - Guest446794, PlayChess.com, 2017
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 7.f4 d6 8.fxe5 dxe5 9.Nc3 Nf6 10.Qe2 Ke7 11.Na4 Qd4 12.Nxc5 Qxc5 13.d3 Bg4 14.Be3 Qb4+ 15.Qd2 Qxd2+ 16.Kxd2 Rhd8 17.Kc3 Be6 18.h3 b6 19.a4 Rf8 20.a5 Nh5 21.Rhf1 Ng3 22.Rfe1 Kd6 23.b4 Bd7 24.Kb3 Nh5 25.c4 Nf4 26.Ra2 g5 27.Kc3 Rg8 28.d4 exd4+ 29.Bxd4 c5 30.bxc5+ bxc5 31.Be3 Kc6 32.Rd2 Rae8 33.Bxc5 Bxh3 34.Bxa7 Bxg2 35.e5 h5 36.Rd6+ Kb7 37.Rd7+ Kc6 38.Rd6+ Kc7 39.Rh6 Rh8 40.Rf6 Kd7 41.Rd1+ Kc8 42.Rb1 Rh7 43.Rb8+ Kd7 44.Rd6+ Ke7 45.Rb2 Rc8 46.Rbd2 Rf7 47.Be3 Bf1 48.c5 Rf5 49.Rd7+ Kf8 50.Rf2 Bb5 51.Rh7 Be8 52.Kd4 Ne6+ 53.Kc4 Rxf2 54.Bxf2 Nc7 55.e6 Nxe6 56.a6 Ra8 57.a7 Nd8 58.Be3 Kg8 59.Rh6 g4 60.Bd4 Kf8 61.Rh8+ Ke7 62.Rh7+ Bf7+ 63.Kb5 Ne6 64.Be5 Rxa7 65.c6 Ra2 66.b6 Rc2 White resigned

Jerome Gambit Secrets #5

Time to look at a couple more "secrets".

Ten years ago I played a Jerome Gambit game that started off

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 7.Qf5+ Kd6 8.f4 

Black then played a relatively weak move that had showed up only once before in The Database.

8...Ne7

When I posted the game on this blog, back then, I recommended, instead, 8...Qh4!?, which had been played a number of times before - as early as a supposed 1899 telephone game - and which continued to be played, year after year. (So: 8...Qh4 isn't much of a "secret".)

9.Qxe5+ Kc6

As a measure of the imbalance of the position, in one of my games, Black resigned at this point.

10.d4

In my blog notes I recommended as better 10.Qc3!?. Curiously, of the 5 subsequent games with that move in The Database, 4 were played by me - and only once did I remember my improvement, but not the proper followup.

The idea, of course, is 10.Qc3 b6 11.b4 and White wins back his piece after either 11...d6 or 11...d5.

So, 10.Qc3 is still enough of a "secret" that private eye "Cliff Hardy" overlooked it in a Jerome Gambit game of his this year - although, since he was playing "blindfold", perhaps "overlook" isn't the right word...

After 10.d4, however, only 2 games in The Database have Black's proper response, 10...d6!? - an almost "secret" move that caught me by surprise, although I was still able to deliver checkmate in 20 moves. The Jerome Gambit is like that, folks.

Stockfish 9 suggests my game should have gone 10.d4 d6 11.Qxg7 Nf5!? 12.exf5 Rg8 13.Qxh7 Bd4 with Black for choice - despite being down material, and despite having his King on c6.

Cliff Hardy noted in assessing his own game that after 10.d4 d6 11.Qxg7 Nf5 12.exf5 Qe8+ 13.Kd1 Bxf5 "...if anything, Black has an edge, despite his two-pawn deficit. Note that 14.dxc5? now would be crushed by ...Qh5+. Instead White should try the sharp 14.d5+!? when Black would be prudent to reply 14...Kb6, with in an unclear position where White's King is in more danger than his counterpart, and Black's 2 Bishops and better Rooks give him the more threatening prospects."

There you go: 10.Qc3!? and 10.d4 d6!?, two secrets for the price of one.

Jerome Gambit: Refutation - Just Like That

It is often fun to see how Black works to dispose of the Jerome Gambit - an opening that appears so bad that it can be vanquished on-the-spot by a quickly assembled-at-home response.

I got to play an online blitz game the other day, and it was reassuring to see that tradition is still respected.

perrypawnpusher - SSGSSGSSG
5 5 blitz, FICS, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 

The Two Knights defense. I have to try for a Jerome, anyhow.

4.Nc3 Bc5 

Now I can get a Jerome out of this.

For some reason I am always uneasy playing this line. Hmmm. Let me check The Database...

I thought so. I have played 60 games with the Italian Four Knights Jerome Gambit line, and have scored only 74%.

That compares to the regular Jerome Gambit move order, 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+, which I have played 319 times and have scored 82%.

Or the Semi-Italian Jerome Gambit, 1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.0-0 Bc5 5.Bxf7+, which I have played 58 times, and have scored 88%.

Even with the Semi-Italian Four Knights Jerome Gambit, 1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.0-0 Nf6 5.Nc3 Bc5 6.Bxf7, which I have played 58 times, I have scored 78%.

(It has to be me. I just checked Bill Wall's statistics, and he scores "only" 92% with the Italian Four Knights Jerome Gambit, vs 93% with the regular Jerome.)    

5.Bxf7+ Kxf7 6.Nxe5+ Nxe5 7.d4 Bb4

There you have it. Problem solved. Stockfish 9 even gives Black a 1/3 of a pawn advantage here. Now to finish White off.

8.dxe5 Bxc3+ 9.bxc3 Nxe4

10.Qd5+ 

How rude.

This kind of thing happens in blitz games all the time. Three of my past games ended at this point: perrypawnpusher - ohforgetit, blitz, FICS, 2010; perrypawnpusher - KnightIsHorse, blitz, FICS, 2011; and perrypawnpusher - Sonndaze, blitz, FICS, 2011. 

10...Kf8 

Or 10...Ke8, as in perrypawnpusher - Aerandir, blitz, FICS, 2011 (1-0, 15). 

11.Qxe4 d6 

12.O-O Qe7 

I had seen 12...dxe5 13.Qxe5 Qe7  before (but, of course, did not remember it) in perrypawnpusher - obmanovichhh, blitz, FICS, 2010 (1-0, 39).

The text has a weakness (putting the Queen on a dangerous diagonal) that 12...Qe8 might have avoided. 

13.Ba3 Be6 

Probably stronger than 13...c5, which was seen in perrypawnpusher - Abatwa, blitz, FICS, 2010 (1-0, 17); but Stockfish 9 prefers 13...Kf7.

14.exd6 cxd6

Okay. Time to take stock. White has recovered his sacrificed piece, with better development and a safer King. His extra pawn is not a big deal, as it is doubled and isolated - a fair reminder that lazy play could lead to a Bishops-of-opposite-colors endgame that Black could draw easily.

So - What weakness in Black's position should White focus on?

15.Rae1 

I decided to pin the Bishop and put pressure on it.

If you thought, instead, that White should go after the d-pawn with 15.Rad1, threatening Black's Queen and King along the a3-f8, Stockfish 9 agrees with you.

15...Kf7 16.f4 g6 

17.f5 gxf5 18.Rxf5+ Kg7 

19.Qxe6 

Sure, this works, but so does 19.Qg4+ Kh6 20.Rh5 checkmate. Ooops.

Now Black has to exchange Queens and go into a lost endgame - or face checkmate.

19...Qc7 20.Qf6+ Black resigned