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.

Thursday, June 28, 2018

Jerome Gambit Secrets #2

As mentioned in the first "Jerome Gambit Secrets"
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 following line of play. 

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6


The Semi-Italian opening. Black is being careful, but the possible waste of a move and the possible weakening of the Kingside can get White thinking Jerome Gambit thoughts.

4.0-0

This is different than the 4.Nc3 seen in MIG - jfer, 3 0 blitz, FICS, 2001 (1-0, 11), the subject of Jerome Gambit Secrets #1. But - is it a difference that makes a difference?

4...Bc5 5.Bxf7+

The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ g6 8.Qxe5 



Here we have a position from perrypawnpusher - islanderchess, 10 0 blitz, FICS, 2008 (1-0, 46). In fact, there are 10 games with this position in The Database - all played by me - and White has won every time.

However, if you play this line with White, it is important that you not become overconfident. As far back as December 2, 2008 on this blog, I recommended that Black play the retrograde 8...Bf8!?, as then the Rook in the corner is off limits: 9.Qxh8? Bg7 10.Qh7 Nf6 and the White Queen is lost.

If The Database is any indication, 8...Bf8 has not yet been tried in this position in any game.

For the record, Stockfish 9 recommends the line 8...Bf8 9.Nc3 d6 10.Qg3 Ne7 11.d4 Bg7 12.Ne2 (it also considers 12.d5, 12.Qd3 and 12.Be3) with Black having the traditional advantage of a piece for two pawns, and White having play with his central "Jerome pawns" against Black's somewhat exposed King.





Analysis diagram

Tuesday, June 26, 2018

Jerome Gambit Secrets #1

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. Occasionally, they will introduce new suggestions. Take for example, the following game. 

MIG - jfer
3 0 blitz, FICS, 2001

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6

The Semi-Italian opening. Black is careful to prevent Ng5 by White.

4.Nc3 Bc5 5.Bxf7+

The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ g6 8.Qxe5 Bd6



Perhaps Black remembered ...g6 from the Blackburne defense, and felt comfortable giving up the Rook on h8. If so, this game is not the best example of analysis by analogy. Maybe the 3-minute blitz game was going so fast...

9.Qxh8 Nf6 10.Qxd8 Be7 11.Qxc7 Black resigned



Okay, no disrespect to the players, but the game did not show either at the top of their skill level. Again, perhaps the time control was a major factor.

Still, Black could have offered the Rook with a different 8th move: 8...Bf8!?. White would take his Queen's life in his hands if he continued 9.Qxh8? Bg7 10.Qh7 Nf6 and Her Majesty is a goner.

The Database has a half-dozen games with the same position after 8.Qxe5 - all wins for White. In none of the games did Black find the dangerous Bishop retreat. (The Database needs some updating, but, when it is, I am confident that 8...Bf8 will not show up there.)

Stockfish 9 suggests a complicated line that leaves White with 3 pawns for his sacrificed piece, but still gives Black the advantage: 8...Bf8!? 9.Nd5 Nf6 10.Nxc7 d6 11.Qc3 Rb8 12.d3 Bg7 13.Qb3+ Ke7 14.Nb5 a6 15.Nd4 Nxe4 16.Qb4 a5 17.Nc6+ Kf8 18.Nxa5 Nf6 19.0–0 Nd5 20.Qb5 Be6 21.Re1 Bf7 22.c4 Nc7 23.Qb4 Na6 24.Qd2.  I like Black's Bishop pair.
    


Analysis diagram

Sunday, June 24, 2018

Jerome Gambit: Naughty Opening

I have a Google Alert set up to notify me about the appearances of the name "Jerome Gambit" on the internet.

This morning it returned a link to a discussion on Reddit.com started by Chessmusings, that leads off

My favorite "naughty opening" is the Jerome Gambit. What's yours?

Cool. I appreciate the mention of my name, and this blog as well.