Friday, July 6, 2018

Jerome Gambit: Refutation - Just Like That


Image result for free clip art magician

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, 2010perrypawnpusher - 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



Wednesday, July 4, 2018

Jerome Gambit: Today's Lesson

In chess, sometimes you give a lesson, sometimes you learn a lesson. This seems especially true in the Jerome Gambit.

Here is one of Bill Wall's recent games. As often happens, he is the teacher.

Wall, Bill - Guest7925523
PlayChess.com, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 



4...Kxf7 5.Nxe5+ Nxe5 6.d4 Ng6



I noticed that The Database has games of Jerome Gambit regulars HauntedKnight, jfhumphrey, ndrwgn, stretto and yorgos facing this move, so it is worth being prepared for it.

7.dxc5 Nf6 

Or 7...d6 8.Qd5+ Be6 9.Qxb7 N8e7 10.f4 Bc4 11.Nd2 Rb8 12.Qxa7 Bb5 13.cxd6 cxd6 14.a4 Bd7 15.O-O Qb6+ 16.Qxb6 Rxb6 17.Nc4 Rc6 18.b3 Be6 19.f5 Bxc4 20.fxg6+ Kxg6 21.bxc4 Rxc4 22.Ra3 Rxe4 23.Rg3+ Kh5 24.Rg5+ Kh4 25.g3+ Kh3 26.Rh5+ Kg4 27.Rh4 checkmate, Wall,B - TenAndOnly10, lichess.org, 2016

8.Be3 

Bill has also played 8.Nc3, e.g. 8...Re8 (8...Qe7 9.Qd4 Re8 10.O-O Kg8 11.Bg5 Qe5 12.Qc4+ d5 13.cxd6+ Be6 14.Bxf6 gxf6 15.Qb4 cxd6 16.Rad1 Red8 17.Nd5 Bxd5 18.Rxd5 Qxe4 19.Qxe4 Black resigned, Wall,B - Silveira,J, lichess.org, 2016) 9.O-O Kg8 10.Re1 d6 11.cxd6 Qxd6 12.Qf3 Bg4 13.Qe3 Nd7 14.h3 Be6 15.Rd1 Qe7 16.f4 Bf7 17.b3 Nf6 18.e5 c6 19.Qf2 Nd5 20.Nxd5 Bxd5 21.c4 Bf7 22.Bb2 Nf8 23.f5 Rad8 24.Qxa7 Rxd1+ 25.Rxd1 Rd8 26.Rxd8 Qxd8 27.Bd4 g6 28.e6 Bxe6 29.fxe6 Nxe6 30.Be5 Qc8 31.Qb8 Qxb8 32.Bxb8 Kf7 33.Kf2 Ng5 34.Bf4 Ne4+ 35.Ke3 Nc3 36.a4 Ke6 37.Bh6 Nd1+ 38.Ke2 Nc3+ 39.Kd3 Nd1 40.Bd2 h5 41.Ke2 Nb2 42.Bc1 Nxa4 43.bxa4 Kd6 44.a5 Kc5 45.Kd3 b5 46.Ba3+ b4 47.Bxb4+ Kxb4 48.a6 Black resigned, Wall,B - Guest688630, PlayChess.com, 2017

8...Re8 9.Nc3 

Black has done well. He has a piece for two pawns, and his King is almost safe. But, now he becomes careless, instead of asking himself: Is that pawn on e4 actually available? (Perhaps we are dealing with a negative "halo effect" as well.)

9...Nxe4 10.Nxe4 Rxe4 

11.Qf3+ 

I guess not. Now Black's game falls apart.

11...Qf6 12.Qxe4 d5 13.Qxd5+ Be6 14.Qxb7 Black resigned


White is ahead an exchange and three pawns.

Monday, July 2, 2018

Jerome Gambit Secrets #4

One of my favorite Jerome Gambit "secrets" has actually been solved, but the story is always a good one to tell. And tell again.

Let's look at a line.

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



4...Kxf7 5.Nxe5+ Kf8

About 4 1/2 years ago I posted about this move
As early as his first article with analysis (Dubuque Chess Journal 4/1874), Alonzo Wheeler Jerome considered the possibility that Black might refuse to capture the second piece, and play for King safety instead with 5...Kf8 
This was, in fact, the defense that Jerome, himself, credited to G. J. Dougherty, ("a strong amateur, against whom I first played the opening") of Mineola, New York, in a yet unfound game; that O.A. Brownson, editor of the Dubuque Chess Journalplayed against Jerome in an 1875 game (Dubuque Chess Journal3/1875); that magazine editor William Hallock used against D.P. Norton in an 1876 correspondence game played “by special request” to test the gambit (American Chess Journal 2/1877); that William Carrington tried in his 1876 match vs Mexican Champion Andres Clemente Vazquez (Algunas Partidas de Ajedrez Jugadas en Mexico, 1879); and which Lt. Soren Anton Sorensen recommended as “more solid and easier to manage” in his seminal Jerome Gambit essay (Nordisk Skaktidende 5/1877). 
It is interesting that early in Jerome's Gambit's life, there were players willing to accept one "gift" but who were skeptical of accepting two "gifts".
6.Qh5

This move shows up in 38 games in The Database, with White scoring 49%.


As I noted

White also has the option of playing 6.Qh5, the Banks Variation, as in Banks - Rees, Halesowen, 2003, when Black can transpose with 6…Nxe5  as recommended by the American Chess Journal, (3/1877) - "The continuation adopted by Jerome, Qh5 looks promising." 
Pete Banks ("blackburne" online), a stalwart member of the Jerome GambitGemeinde (and still the strongest player I know who has played the Jerome regularly over-the-board in rated contests), brought international attention to Alonzo Wheeler Jerome's invention by writing to International Master Gary Lane, who commented at length on the opening, and on a couple of Banks' games, in his March ("The Good Old Days") and April ("Chess Made Easy") 2008 "Opening Lanes" columns at ChessCafe.com. IM Lane also mentioned one of Banks' games in his The Greatest Ever chess tricks and traps (2008), which reprised some of the earlier material. 
It is humorous to note that in his "Opening Lanes" column Lane wrote, after 5.Nxe5+, "I think anyone with good manners playing Black would now kindly ask their opponent if they wanted to take their move back" while in his book he changed this to "I think anyone with good manners playing Black would now go to another room to carry on laughing." 
Apropos the Banks Variation itself (i.e. playing 6.Qh5 in response to 5...Kf8), IM Lane noted in "The Good Old Days" that "6...Qe7 is a good alternative [to 6...Qf6 of Banks - Rees], because it stops the checkmate and protects the bishop on c5." 
A few months later, 6...Qe7 was tested successfully in a GameKnot.com game, splott - mika76, 20081.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Kxf7 5.Nxe5+ Kf8 6.Qh5 Qe7 7.Ng6+ hxg6 8.Qxh8 Qxe4+ 9.Kf1 Qd4 10.Ke1 Qxf2+ 11.Kd1 d6 12.h3 Qxg2 13.Re1 Qf3+ 14.Re2 Bf2 15.d3 Nd4 16.Nc3 Qh1+ 17.Kd2 Nf3 checkmate. Clearly White, the very-slightly-higher rated player, was taken aback by the move. I asked mika76 if he had been influenced by IM Lane's recommendation, but he said he had come up with the move himself.