Monday, December 16, 2019

Jerome Gambit: Full-Bodied Defense

Jerome Gambit players are familiar with the "negative halo effect" -
When people notice a good trait in a person, they often assume other positives. With the Jerome Gambit  often a negative "halo effect" occurs – if the early moves are bad, many of the other ones must be bad, too.
So - our opponents misjudge our play, and go down in flames.

In the following game, a superficial assessment of Black's chess skill - and, therefore, his prospects in the following game - can be made, based upon his 8th move. That would be a mistake, as, thereafter, Black presents a full-bodied defense and battles White all across the board.

In the end, Black loses, but only after a quite memorable game.

Wall, Bill - Maxx
chess24.com, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 7.Qxe5 Qe8 



This novelty is an odd move, one which looks like a mouse-slip for 7...Qe7. It is as if Black looked forward to ...Qxe4+, without acknowledging the fact that White, first, can capture, with check, as well.

8.Qxc5+ d6 9.Qb4 

White has his sacrificed pieces back, and is a couple of pawns up, something he could cement with the routine 9.Qe3. Instead, he opts to make the game interesting - and is rewarded, fully.

9...Qg6 

If you give this game to a computer, it will claim an edge for White for most of the game. Black is not concerned about that, here - he wants to make things as uncomfortable as possible for his opponent.

10.Kf1 Nf6 11.Nc3 c5 12.Qc4 a6 



13.f4

This is a thematic Jerome Gambit move, but the pawn is usually backed by a Rook at f1.

13...Qg4 14.Ne2 b5 15.Qb3 Nxe4 



Whoa! White has a problem that usually plagues Black: his d-pawn blocks his Bishop, which, in turn entombs his Rook. Black has the freer development, as well - and he plans to sacrifice a piece, to keep things uncomfortable for his opponent. 

16.Qd5 Bb7 17.Qxb7 Re8 18.Qd5 Qxe2+ 19.Kxe2 Nf6+ 20.Kf3 Nxd5 

White is hanging in, and the computer still counts his pawn advantage (plus a small bonus for the Bishop vs the Knight), but, the question is: how does he continue?

He moves to open the a-file for his Rook.

21.a4

Komodo 10 doesn't like this move, opting for small pawn advances like c2-c3, g2-g3, d2-d3, with White eventually doubling Rooks on the e-file, for an edge.

21...b4

Black doesn't want to cede the a-file, but this move seems to help White. The computer's suggestion leads to an unbalanced Rook + pawns vs Rook + pawns endgame, and I am not sure that I am comfortable with its equal assessment: 21...Nb4 22.axb5 axb5 23.c3 Nd3 24.b4 Ke7 25.Ra5 Kd7 26.bxc5 dxc5 27.Ba3 Ra8 28.Rxa8 Rxa8 29.Ke3 c4 30.Bb4 Nxb4 31.cxb4 Kc6 32.g3 Kd5 33.Rb1 Ra3+ 34.Kf2 Rb3 35.Ra1 Rxb4 36.Ra7 Ra4 37.Rxg7 b4




analysis diagram





22.b3 h5

To develop the other Rook. 

23.Bb2 h4 24.Rad1 Rh6 25.Rhe1 



White looks much more comfortable.

25...Rxe1 26.Rxe1 Rg6 27.d4 cxd4 28.Bxd4 Nc7 



White now demonstrates that there are too many things loose in his opponent's position.

29. Bb6 Nd5 30.Bd8 Rh6 31.Bg5 Rh7  32.Re6 h3 33.g4 Nc3 34.Rxd6 a5 35.Bd8 Black resigned



A nice finish. Black's Queenside pawns will fall.

Saturday, December 14, 2019

Jerome Gambit: Unusual Opening, Unusual Idea, Usual Result

Image result for free clip art unusual


White starts off with an unusual opening (the Jerome Gambit) only to face an unusual defense (the Jerome Defense) - which he counters with an unsual line; which, for Bill Wall, brings about the usual result. 

Wall, Bill -XYSL
FICS, 2019

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



4...Kxf7 5.Nxe5+ Kf8 6.Nd3 



Sure. Why not? Unusual ideas, even in an unusual opening, can be upsetting for the opponent.

The Database has 273 games with the move 5...Kf8; White scores 55%. Only 7% of those games - 20 - have the interesting, and reasonable, 6.Nd3, with White scoring 78%. It is a favorite of Petasluk, who has scored 12 - 4 - 1.

It is to be noted that The Database has 102 games with the recommended 6.Nxc6, with White scoring 58%.

6...Be7 

White's creativity pays benefits immediately. The stronger 6...Bb6, as in Wall,B - Tim93612, Chess.com, 2010 (1-0, 36), kept the Bishop more active. 

7.Nc3 d6 8.Nf4 Bg5 9.d4 Bxf4 

Black moves his Bishop 4 times, excchanging it off for the Knight that has moved 4 times.

10.Bxf4 Nge7 

White has only 2 pawns for his sacrificed piece, but has probably equalized. His development is to be preferred.

11.O-O Ng6 12.Be3 Qf6 



There are many games where Black's Queen comes to f6, with a positive impact - but I don't think many of them feature Black's King on the f-file, when White can get in f2-f4. Too, White is in position to harass the enemy Queen with Nd5. Storm clouds are gathering.

13.f4 Ke8 14.Nd5 Qf7 15.f5 Nge7



Too casual. Necessary was 15...Nf8.

16.Nxc7+ Kd7 17.Nxa8 b6 

The plan is to get the Bishop to b7, and win the Knight at a8, but it is all too late.

18.d5 Ne5 19.Qd4 Bb7 20.Qa4+ 



20...Kc8 21.Qxa7 Nxd5 22.exd5 Bxd5 23.Nxb6+ Kd8 24.Bg5+ Ke8 25.Qb8 checkmate

Thursday, December 12, 2019

Jerome Gambit: Familiar, Unfamiliar

Image result for free clip art survival



Part of the humor of the following game is that it starts out in a line that White has plenty of experience with, but, in an eyeblink (at move 8) it moves into uncharted territory. The player who is more familiar with the opening is the one who survives. 

Wall, Bill - Guevad
ChessTempo.com, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Nxe5 6.d4  Bd6 


Bill is 23 - 0 from this position. This reflects his experience, of course, but also suggests that the game move is not best. The simple 6...Bxd4 was fine.

7.dxe5 Be7 8.Qf3+ 

Despite Bill's familiarity with this Jerome Gambit variation, the text is a novelty. Creativity, even in routine situations.

8...Ke8 9.O-O Bg5 

Black wants to swap off his troubled Bishop, activating his Queen in the recapture. What could be wrong with that? What typical Jerome Gambit tactic has the defender overlooked?

10.Qh5+ g6 11.Qxg5 Qxg5 12.Bxg5 h6 13.Be3 b6 14.c4 Bb7 15.Nc3 Ne7 16.f4 Nc6 

White has recovered his sacrificed piece, and is ahead 2 pawns. He is in no hurry, but eventually his "Jerome pawns" will become restless, after his pieces have moved into position. 

17.b3 Nb4 18.Rf2 c5 19.Rd1 Rf8 20.Nb5 Kd8 21.f5 Bxe4 22.f6 
g5 23.e6 Black resigned


Oh, dear. Stockfish 10 suggests here that the only move to avoid falling into checkmate would be 23...d5, which would, of course, lead to 24.cxd5, and White's 3, connected, passed "Jerome pawns" would be a nightmare. (As if the alternative, 24.e7+, would not be enough to cause Black to turn over his King.)

Tuesday, December 10, 2019

Jerome Gambit: Simple Steps and Mis-steps

Image result for free clip art fallen



Sometimes the Jerome Gambit plays out like a "regular" (i.e. non-refuted) opening. Little mis-steps by Black can lead, in due course, to a painful ending. Bill demonstrates, in the following game.


Wall, Bill - Guest7665109
PlayChess.com, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6 



7.Qxc5 d6 8.Qd5+ Ke8 

Black does not want to offer his b-pawn with 8...Be6. Perhaps he should have.

9.d4 N8e7 10.Qb3 Bd7

Now he is willing, but Bill declines.

11.O-O b6

Overly cautious; it is still not a good idea for White to grab the b-pawn. On the other hand, White gets time to work on his "Jerome pawn" center.

12.f4 Nc6 13.f5 

13...Nh4

Perhaps the Knight needed to go to e7? It was possible to grab the pawn with 13...Nxd3, but after 14.Qd3 Ne6 15.exf6 gxf6 White would be a bit better.

14.Qg3 Qf6 15.Nc3 Qxd4+ 



How can grabbing a free pawn - with check - be an error? Watch, and see.

16.Be3 Qf6 17.Nd5 

A Knight on d5 is one attacking theme in the Jerome Gambit. The Black Queen is attacked, but it protects the Knight. Ouch.

17...Qe5 18.Qxh4 Rc8 19.f6 



19...gxf6 20.Nxf6+ Kd8 21.Ng4+ Qe7 22.Bg5 Black resigned



Sunday, December 8, 2019

Jerome Gambit: Defending Well, Until

In the following game, Black is defending well - until. That can happen in a Jerome Gambit.

angelcamina - kamosik
1 0 bullet, lichess.org, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 


4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6


7.Qd5+ Ke8 8.Qxc5 d6 9.Qe3 N8e7 


10.O-O Rf8 11.f4 Nc6 12.d4 Bd7 13.f5 Nge7 


Black's pieces huddle around his King, providing protection. Suddenly, his Rook pawns undo all the work. 

14.Nc3 h6 15.Qf3 a6 

16.Qh5+ Rf7 17.f6 g6 18.Qxh6 Ng8 19.Qh8 Kf8 20.Bh6+ Black resigned

Checkmate is coming.

Friday, December 6, 2019

Jerome Gambit: Win, How? (Part 2)

Image result for free clip art puzzled


[continued from previous post]


perrypawnpusher - schnappa
Italian Game Classic, Chess.com, 2019



11.d3

Alonzo Wheeler Jerome played this move, with a transparent threat to pin and win Black's Queen, in games against Shinkman in 1874 (0-1, 21), Brownson in 1875 (1-0, 42), Amateur in 1876 (1-0, 20) and Pane in 1878 (1-0, 41). The Database has 9 games where Black overlooked the threat and lost his Queen - 7 of those wins were mine.

11...Ke7 

The Chess.com analysis rated 11...Ke7 to be an  "inaccuracy" (The Database: 11 games, White scores 64%), seeing 11...Kc6 as best (The Database: 11 games, White scores 27%).

The alternative, 11...Kc6, attributed to B.K. Neufville, “gives Black an opportunity for a counter attack and makes an exciting contest” according to Jerome, in the American Chess Journal, of April 1878.

12.Nc3

An "inaccuracy", according to the analysis, which considered 12.c3 as "best".

I should give the alternative title of "Jerome Gambit Secrets #10" to the current post, as The Database shows only 1 game with 12.c3, and it continued 12...d6 13.Bg5? Qxg5 White resigned, which was a result quite likely to keep the variation "secret".

12...d6 

This move was "inaccurate"; 12...Bd4 was "best".

(If you are getting tired of all of this "inaccurate" stuff, so am I. Considering the whole game, the computer assessed me as being 91.9% "accurate", while my opponent was  89.7% "accurate". I don't know what that means.)

The latter move, 12...Bd4, was played against me in perrypawnpusher - karleinkarl, blitz, FICS, 2012 (0-1, 16), a sad game where, in a bit of an echo, I allowed Black to pin my Queen to my King.

13.Bf4 

So far, we are following Jerome - Brownson, Iowa, 1875, which continued 13.Bf4 Qe6 14.O-O-O Qg4 15.Qf1 g5 16.Bg3 Be3+ 17.Kb1 Bf4 18.Bf2 c5 19.h3 Qh5 20.h4 Be6 21.hxg5 Qxg5 22.Bh4 Qg4 23.Nd5+ Bxd5 24.exd5 Rae8 25.d4 Bg5 26.Bxg5 Qxg5 27.dxc5 dxc5 28.Qb5 b6 29.d6+ Kf7 30.Rhf1 Kg7 31.Qc6 Rhf8 32.a3 Rd8 33.g4 Nxg4 34.Qc7+ Kg8 35.Rxf8+ Rxf8 36.Qxa7 Qd8 37.Qa4 Ne5 38.Qe4 Ng6 39.Qe6+ Rf7 40.d7 Nf8 41.Qe8 Qxd7 42.Rxd7 Rxd7 43.Qb8 Black resigned

13...Qh5

The Chess.com analysis announced "inaccuracy", preferring 13...Qd4 (which does not show up in The Database at all) as "best".

In perrypawnpusher - vz721 -Italian Game thematic, Chess.com, 2013, I now castled Queenside, allowing the exchange of Queens. Looking over that game while I was putting together this post, I was shocked to see that both I and my opponent seem to have overlooked the response 14...Bg4!?


In any event, against schnappa I now played the kind of move that you would more likely see in a 1 0 bullet game, just to mess with my opponent ("threatening" to remove his Knight at f6, which protects his Queen) and give me time to figure out if I wanted to swap Queens, after all.

14.Nd5+ 

And here, much to my surprise, Black resigned.

Of course, 14...Nxd5? would be a mistake, but any reasonable King retreat - 14...Kd8, 14...Kf7 or 14...Kf8 - would be fine. He should avoid 14...Ke6, which would allow the fork 15.Nxc7+, and both 14...Kd7? and 14...Ke8? (resurrecting the primary threat) would fall to 15.Nxf6+.

The Chess.com analysis rated the final position as -2.29, giving Black over a 2 pawn advantage, which makes sense to me.

It recommended the following continuation: 14...Kf7 15.Qxh5+ Nxh5 16.Rf1 Nxf4 17.Rxf4+
 Kg6 18.Nxc7 Rb8 19.Kd2 Bd4 20.Raf1 Be5 21.R4f2 b5 22.Nd5 Be6 23.Ne7+ Kg5 24.Nc6 Rbc8 25.h4+ Kh6 26.Nxe5 dxe5 27.a3 Kg6 28.g3


My best guess is that demands of the outside world temporarily distracted my opponent.