Showing posts with label jecree. Show all posts
Showing posts with label jecree. Show all posts

Saturday, June 30, 2018

Jerome Gambit Secrets #3

As mentioned in the first "Jerome Gambit Secrets" post
If you play the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) you know that the best source of information on the opening is this blog. 
If you face the Jerome Gambit, however, the best source of information on defending against the opening is - this blog.
Across the 10 years that I have shared history, games and analysis, I have done my best to give the lines that give White the greatest opportunities to snatch victory from the jaws of this defeated - er, "refuted" - opening. 
I have also not shied away from presenting the various refutations, as well. 
Sometimes players have used my suggestions. Sometimes they have not. The "Jerome Gambit Secrets" posts will re-visit suggestions that appear to remain unplayed.

 Take for example, the play based on the following game. 

Blackstone, John - Dommeyer, Carl
skittles game, Campbell, California, 1960

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7



5.Nxe5+ Ke8 


Black decides to mix things up - some psychological warfare, perhaps - although the move is not "best". This is the first game example that I have in The Database (56,000+ Jerome and Jerome-ish games), but the position ultimately appears in 71 games; White scores 66%.

6.Qh5+

The Database gives this move in 34 games, and White scores 79%.

With that kind of success, it is not surprising that the improvement, 6.Nxc6, has not received as much play. The problem with the improvement it that it, too, faces an improvement.

The move 6.Nxc6 appears in 15 games in The Database, with White scoring 70%. That is a very reasonable outcome for the first player, but comparatively less successful than the text move, 6.Qh5+.

Why, then, choose this "better" move, especially since it can be met by 6...Qh4!? first mentioned in "You, too, can add to Jerome Gambit theory!" - and still having no examples in The Database? After all, Stockfish 9 recommends the messy 7.d4 Qxe4+ 8.Be3 bxc6 9.dxc5 Qxg2 10.Kd2 Qd5+ 11.Kc1 Ne7 12.Nc3 Qxd1+ 13.Rxd1 and White has an edge due to his bind on the Queenside, but it is not something to get too excited about.



analysis diagram





How is this better than the play in the game? Let's see.

6...g6 7.Nxg6 Bxf2+

Another psychological ploy for the defender in the Jerome Gambit is the "If you can sacrifice a Bishop, so can I!" maneuver. While not often useful, it is the best move in this position, as Black gets a pawn for the piece, instead of letting it hang. 

8.Kxf2

It seems fair to mention that 8.Kf1?! was played in jecree - lhoffman, 2 12 blitz, FICS, 2008 (1-0, 24), although the improvement 8...Nf6!? (which I mentioned 2 1/2 years ago in "A Long Day In the Life of the Jerome", and which has not yet appeared in The Database) would have likely reversed the outcome of the game. 

8...Qf6+ 

This move was played in all 5 games in The Database to reach this position, with White scoring 80%.

I am not sure of the attraction of the Queen move (except that it delivers check), but much better is 8...Nf6!?, mentioned here a decade ago, and still, as far as I know, unplayed. After Stockfish 9's 9.Qh4 Rg8 10.Rf1 Rxg6 11.Kg1 Qe7 12.d3 Black has a piece for two pawns and a more comfortable King than he often has in the Jerome Gambit, with better development - an advantage.

That is one argument in favor of the alternative 6.Nxc6.

After 9.Nf4+ Kd8 10.d3 Blackstone consolidated his game, had the advantage, and won in 13 moves. White took risks, and won - a very fine outcome for the Jerome Gambit.

Monday, December 28, 2015

A Long Day In The Life of the Jerome Gambit

Sometimes Jerome Gambit games are easy, sometimes not. Sometimes they are pretty, sometimes pretty ordinary. Always they are complicated. Always they are exciting. Enjoy the following game, high notes and low.


Laaber - Ausxh,
blitz, FICS, 2015

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Ke8 6.Qh5+



The text is thematic, but 6.Nxc6 is probably better: 6.Nxc6 dxc6 7.Qh5+ g6 (7...Kf8 8.Qxc5+ Qd6 9.Qe3 Nf6 10.e5 Ng4 11.Qf4+ 1-0 Wall,B - Gebba, Chess.com, 2010) 8.Qxc5 Qe7 9.Qc3 Qxe4+ 10.Kf1 Black resigned, Wall,B - Guest1609773, PlayChess.com, 2013;

Not 6.Nxc6 bxc6? 7.Qh5+ as seen in perrypawnpusher - rodrigojalpa, blitz, FICS, 2008 (1-0, 25); perrypawnpusher - zsilber, blitz, FICS, 2010 (½-½, 42);  Wall,B - Qwerty, Chess.com, 2010 (1-0, 9); and Wall,B - LFTN, FICS, 2012 (1-0, 20), for example.

Interestingly, Stockfish 6 prefers 6.Nxc6 Qh4!?

6...g6 7.Nxg6 Bxf2+

Best!?

8.Kd1 

8.Kxf2 is playable: Blackstone,J - Dommeyer,C, Campbell, CA 1960 (1-0, 13); Philidor 1792 - Guest834593, PlayChess.com, 2014 (1-0, 16); ZahariSokolov - naijachampion, FICS, 2014 (1-0, 34).

The alternative, 8.Kf1, doesn't work if Black follows up with 8...Nf6!?, but that hasn't shown up in The Database yet, only 8...hxg6?! in jecree - lhoffman, FICS, 2008. 

8...Nf6 9.Nxh8+

White is overlooking something.

9.Qf3 was seen in Petasluk  - Klonkku, FICS, 2011 (1-0, 57). 

9...Kf8 

Black, too: 9...Nxh5.

And some thing else.

10.Qf5

Missing: 10.Qf7 checkmate. 

10...d6 11.Qxf2 

White will be up the exchange and a couple of pawns once he gives back the Knight at h8.

11...Bg4+ 12.Ke1 Qe8

Trying to mix it up again.

13.d3 

There was nothing wrong with 13.Qxf6+.

13...Kg7 14.Bg5 Nxe4 15.dxe4 Qxe4+ 16.Be3 Nd4 



White is winning, but it may not feel that way to him.

17.Nc3 Nxc2+ 18.Kf1 Nxe3+ 



19.Kg1 Qe5 20.Re1 Rxh8 21.Rxe3 Qd4


The extra Rook will help White, once it gets free. But first White will take advantage of Black's last move and win the Queen.

22.Re7+ Kg6 23.Qxd4 Rf8 24.Qxg4+ Kf6 25.Qe6+ Kg5 26.h4+ Kf4 27.Nd5+ Kg3 28.Qh3 checkmate





Saturday, July 25, 2015

How Goes the Second Decline?


The following game allowed me to both see what an interesting new Jerome Gambit player was doing, as well as check out another example of a defensive move by Black that I have sometimes underestimated.

ZahariSokolov - naijachampion

standard, FICS, 2014

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 




4...Kxf7 5.Nxe5+ Ke8


Black decides that accepting one sacrificed piece is enough.


His King would be safer on f8, however. See "A Second Chance to Decline".


6.Qh5+


The text is thematic, but 6.Nxc6 is probably "objectively" stronger. See "Don't drive like my brother", "Ooops..." and "A Short Wall(k)".


6...g6 7.Nxg6 Bxf2+


At first glance a surprise, but Black counts the Bishop's time left as limited, and plans to get a pawn for it.

8.Kxf2


White escaped twice after declining the piece, but it is not a strategy that I would endorse:


8.Kd1 Nf6 9.Qf3 Rg8 10.Nf4 Bc5 11.c3 d6 12.d4 Bb6 13.h3 h5 14.Re1 Bd7 15.Nd5 Nxd5 16.exd5+ Ne7 17.Qxh5+ Kf8 18.Rf1+ Nf5 19.Bh6+ Ke7 20.Rxf5 Bxf5 21.Qxf5 Qd7 22.Bg5+ Ke8 23.Qe4+ Kf8 24.Bh6+ Kf7 25.Nd2 Rae8 26.Qf4+ Kg6 27.Kc2 Qf5+ 28.Qxf5+ Kxf5 29.g4+ Kg6 30.Bf4 c6 31.Bxd6 Re2 32.Kd3 Rge8 33.Nc4 Bd8 34.a4 b5 35.axb5 cxb5 36.Ne5+ Kg7 37.Kxe2 Bg5 38.Rf1 Rh8 39.Rf7+ Kg8 40.Rf3 Kh7 41.Nc6 Re8+ 42.Kf2 a6 43.Ne5 Bh4+ 44.Kg2 a5 45.Rf7+ Kg8 46.Rf5 a4 47.Rh5 Bd8 48.Bb4 Kg7 49.h4 Bf6 50.Kh3 Rf8 51.g5 Bd8 52.Kg4 Bc7 53.Bc5 Bb8 54.d6 Rd8 55.Nc6 Rd7 56.Nxb8 Kg6 57.Nxd7 Black forfeited on time, Petasluk - Klonkku, FICS, 2011;


8.Kf1 hxg6 9.Qxh8 Qf6 10.Qxf6 Nxf6 11.Kxf2 Nxe4+ 12.Ke3 d5 13.Nc3 Bf5 14.Nxe4 Bxe4 15.d3 Bf5 16.Bd2 Kd7 17.Rhe1 Re8+ 18.Kf2 Ne5 19.h3 d4 20.Bf4 Kd6 21.Bxe5+ Rxe5 22.Rxe5 Kxe5 23.Re1+ Kd6 24.Kf3 Black resigned, jecree - lhoffman, FICS, 2008.


8...Qf6+


8...Nf6! is the correct move here, still unplayed as far as The Database is concerned.


9.Qf5


9.Nf4+ is the strongest rejoinder, as seen as far back as Blackstone,J - Dommeyer,C, Campbell, CA 1960 and as recent as Philidor 1792 - Guest834593, PlayChess.com 2014.


9...hxg6 10.Qxf6 Nxf6 11.d3 d6 




Black has the standard piece for two pawns. He has seen the Queens leave the board, and his King has escaped danger, but the game is not over.

12. c3 b6 13. Bg5 Ng4+ 14. Ke2 Be6 15.Nd2 Rxh2



A tactical oversight, not just the win of a pawn. 

16.Rxh2 Nxh2 17.Rh1 Ng4


Still missing something, or in shock. It was time to bite the bullet with 17...Bxa2.


18.Rh8+ Kd7 19.Rxa8 Bxa2



White is a clear exchange ahead. From here on he outplayed his opponent.

20.b3 Nge5 21.Rg8 Na5 22.d4 Nxb3 23.Rg7+ Kc8 24.dxe5 Nxd2 25.Kxd2 dxe5 26.Rxg6 a5 27.Be7 Kd7 28.Ba3 Be6 29.g4 c6 30.g5 b5 31.Rg7+ Kd8 32.Ra7 a4 33.Ke3 Kc8 34.g6 Black resigned


Wednesday, September 12, 2012

Still Strange, Still Intriguing (Part 2)



Continuing with my historical review from earlier coverage in this blog on the following position:



At the beginning of 2010, in "Opening Reports on the New Year's Database [a fore-runner of The Database]" I reported

I re-ran the Opening Report on 1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+, and noticed that White scored 74% against 5...Ke8; 67% against 5...Ke7; 53% against 5...Nxe5; 45% against 5...Kf8; and 38% against 5...Ke6.

That last statistic got me interested again in following down what I called "A Strange But Intriguing Path (Part 1)" (where I looked at the natural, but not best response, 6.Nxc6):

[5...Ke6] What an odd move! Yet, there are 10 examples in the New Year's Database, and White only scored 30% in those games. As I've noted, this bears examination.

A further look appeared in "A Strange But Intriguing Path (Part 2)"
where, in addition to the troubled 6.f4, I looked at a couple other lines for White:

Inadequate is 6.Nc4 Qf6 (6...Qh4!? 7.Qe2 Nd4 8.Qd3 Nf6 [stronger than 8...Nxc2+ 9.Qxc2 Qxf2+ 10.Kd1 Qxg2 11.Re1 Qxh2] 9.Nc3 d5 10.exd5+ Kf7 11.Ne3 Re8 12.Ne2 Rxe3 13.dxe3 Bf5) 7.Qg4+ Ke7 8.0-0 h6 9.Nc3 d5 10.Nxd5+ Black resigned, jecree - larsgoran, FICS,  2008 

Tricky is 6.d4, as the pawn is poisoned, provided that White responds to either 6...Nxd4 or 6...Bxd4 with 7.Qg4+ (7.Nf3 may draw). 


After 6.d4 Nxe5 (6...Nf6 is best met by 7.Nf3 with an edge to White) 7.dxe5 d6 (7...Kxe5? 8.Qd5+ Kf6 9.Bg5+ Kg6 10.Qf5+ Kh5 11.g4 checkmate) 8.Nc3 Black has an edge. 


In "A Strange But Intriguing Path (Part 3)" I tackled what is possibly White's strongest response to 5...Ke6:

6.Qg4+ Kxe5

If White is going to have a chance in this variation, he must sacrifice the second piece. If Black then wishes to play on, he must accept the piece.


If 6.Qg4+ Kf6, then 7.Qf5+ Ke7 8.Qf7+ Kd6 9.Nc4 checkmate. 


If 6.Qg4+ Kd6 7.Nf7+ wins.


If 6.Qg4+ Ke7 7.Qxg7+ Kd6 8.Nf7+ wins.


7.d4+



[to be continued]


Friday, January 22, 2010

A Strange, But Intriguing, Path (Part 2)

Let's continue to take a look at a strange variation of the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf 7+) that we started with yesterday – see "A Strange, But Intriguing, Path (Part 1)"

blackburne - DREWBEAR
JG Tourney4, Chessworld, 2009

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



4...Kxf7 5.Nxe5+ Ke6



This can't be good, can it?

6.f4

Inadequate is 6.Nc4 Qf6 (6...Qh4!? 7.Qe2 Nd4 8.Qd3 Nf6 [stronger than 8...Nxc2+ 9.Qxc2 Qxf2+ 10.Kd1 Qxg2 11.Re1 Qxh2] 9.Nc3 d5 10.exd5+ Kf7 11.Ne3 Re8 12.Ne2 Rxe3 13.dxe3 Bf5) 7.Qg4+ Ke7 8.0-0 h6 9.Nc3 d5 10.Nxd5+ Black resigned, jecree - larsgoran, FICS,  2008

Tricky is 6.d4, as the pawn is poisoned, provided that White responds to either 6...Nxd4 or 6...Bxd4 with 7.Qg4+ (7.Nf3 may draw).

After 6.d4 Nxe5 (6...Nf6 is best met by 7.Nf3 with an edge to White) 7.dxe5 d6 (7...Kxe5? 8.Qd5+ Kf6 9.Bg5+ Kg6 10.Qf5+ Kh5 11.g4 checkmate) 8.Nc3 Black has an edge. 

6...Nxe5


7.fxe5

This does not turn out well. Rybka actually recommends 7.d4 as best for White, although, as you might guess, Black has an advantage in all variations.

7...Qh4+


Here's the trouble.

8.Ke2

Worse was 8.g3 Qxe4+ 9.Qe2 Qxh1+ 10.Qf1 Qxf1+ 11.Kxf1 Kxe5 12.c3 Ke6 13.d4 Bd6 14.Nd2 b6 15.Ne4 Bb7 16.Ng5+ Kf6 17.Bd2 h6 18.Nh3 Rf8 19.Ke2 Re8+ 20.Kd3 Ne7 21.Rf1+ Kg6 22.Nf2 Rhf8 23.Be3 Nd5 24.Bd2 b5 25.g4 Rf3+ 26.Kc2 Ne3+ 27.Bxe3 Rexe3 28.h4 Re2+ 29.Kb3 Rfxf2 30.Rg1 Rxb2 checkmate, Superpippo - MrJaggers, FICS, 2002

8...Qxe4+ 9.Kf1 Nh6 10.Nc3 Rf8+ White Resigned