Showing posts with label Verlen. Show all posts
Showing posts with label Verlen. Show all posts

Thursday, March 8, 2018

Jerome Gambit: The Science of the Draw?! (Part 1)



I just completed my second Jerome Gambit game in the ongoing "Italian Battleground" tournament at Chess.com. It put me very much in mind of the questions raised in the recent post "Jerome Gambit: The Eternal Question of Draws".

It felt, at first, like I was dropping 1/2 a point, but by the end of the game it appeared like I had won 1/2 a point. In any event, it is appropriate to speak well of my opponent, Krisstianes_017, whose scientific approach to defending against the opening was successful - if you call achieving a draw against a "refuted" opening a success. (Another "eternal question".)

(Although my "escape" into a drawn endgame a pawn down was very much "scientific" as well, as it involved knowledge and experience with Bishops-of-opposite-colors.)  


perrypawnpusher - Krisstianes_017
"Italian Battleground", Chess.com, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6 



The same line chosen by Abhishek29 in my other Jerome Gambit (so far) in the same tournament. For a short while I was worried that I would be playing the same game, twice.

7.Qd5+

Again, the "nudge".

7...Ke8 8.Qxc5 d6 9.Qe3 Nf6 10.O-O Be6


Black is developing his minor pieces, but this move is probably not best, as it summons the move f2-f4 (threatening a pawn fork with f4-f5) from White.

After the game, in preparing this blog post, I asked Stockfish 9 to evaluate the move 10...Be6. At a depth of 30 ply, it saw the resulting position as equal. That is worth thinking about. Should Black be happy? Should White be happy?

It is funny to note, however, that after White plays 11.f4, Stockfish 9 - again, at 30 ply analysis depth - recommends returning the Bishop with 11...Bc8!? and evaluates the result as a slight edge to Black!

I have just recently begun using version 9 of Stockfish to help me understand my completed games, and this is not the only quirky output it has provide me.  

In any event, the computer prefers 10...Nh5!? (preventing f2-f4?) instead of the text.

11.f4 Ne7 

Interesting and good.

I faced 11...Bc4 in perrypawnpusher - avgur, blitz, FICS, 2009 (1-0, 43) as well as 11...Ng4 in perrypawnpusher - Verlen, blitz, FICS, 2010 (1-0, 23) and 11...Kd7 in perrypawnpusher - dirceu, blitz, FICS, 2010 (1-0, 16).

12.d4

Stockfish 9's recommendation is 12.f5 Bc8 13.c4 Nc6 14.d3, apparently seeing ...d7-d5 as worth preventing.

12...Kd7 

Courageously planning to castle-by-hand on the queenside. I can see why my opponent would not want to strike at the center until his King was safe.

Still, the computer's suggestion is 12...d5, and I faced that move in perrypawnpusher - nmuffjgp, blitz, FICS, 2010 (1-0, 22).

13.d5 Bf7 14.c4 Kc8 

15.e5 

My plan was to open the center and use my "Jerome pawns" to cause havoc amongst Black's minor pieces.

Amazingly, after the game Stockfish 9 recommended the line 15.Bd2 Kb8 16.Nc3 h5 17.Rae1 a5I was reminded of my ancient Fidelity Chess Challenger 7, that, when it assessed its King to be safe (wherever it was) and the position balanced, couldn't "think" of what to do, and so would advance its Rook pawns...  

15...dxe5 

This seems natural to me, but the computer doesn't like it, and prefers 15...Ng4 with an even game.

16.fxe5 Nfxd5 

Again, in the post mortem Stockfish 9 had a fit with this idea. I thought it was rather "scientific" to give back the sacrificed material and leave me with an isolated pawn.

17.cxd5 

Sigh. After the game, the compter had a fit with this move, too. I am glad I wasn't working with the old "talking" Fritz computer program that had a whole CD full of insults and sarcasm!


[to be continued] 

Monday, September 20, 2010

Working Knights



Here's another Jerome Gambit with a flurry of pieces, especially Knights, on the Kingside, harassing my poor Queen...

perrypawnpusher - Verlen
blitz, FICS, 2010

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 Nf6


10.0-0 Be6 11.f4 Ng4


Black has developed his Bishop to a risky square, facing a pawn fork after 11.f4. His solution is to ignore the threat and attack White's Queen. Safer was either 11...Bf7 or 11...Ne7.

12.Qg3 Rf8

Black has a simpler way out of his dilemma: exchange Queens. After the game Rybka suggested 12...Qh4 13.Qxh4 Nxh4 14.g3 d5 15.gxh4 dxe4 16.Nc3 Nf6 17.Re1 Kd7 18.Nxe4 Nxe4 19.Rxe4 Rae8 and White's two extra pawns are not going to mean much, especially if Black can force the Rooks off of the board and play a Bishops-of-opposite-colors endgame.

13.f5 N6e5



14.d4

Simpler was 14.fxe6, but the text move is okay.

14...Bc4 15.Re1 h5



16.dxe5 dxe5 17.Be3 Qd7 18.h3 Nxe3 19.Qxe3 Qb5


20.b3 Bf7 21.Nc3 Qc6 22.Rad1 Qf6


Black has reinforced his Kingside with pieces. True, White has a pawn advantage, but it will be a long time before it will become meaningful in the game; and even then, it will be facing a stocked side of the board.

23.Nd5 Black resigned

The end came as a surprise to me. Perhaps my opponent just didn't see the value (or fun) in defending a technical position.