Jerome Gambit: A Complicated Affair (Part 3)

 [continued from the previous post]

perrypawnpusher - PasayDefence

"Piano Piano" tournament, Chess.com, 2020

What to do? What to do?

The forward f-pawn is going to fall. After some Rook moves, I decided to exchange my beloved "Jerome pawns" for my opponent's Queenside pawns.

32.Rc1  Kf8 33.Rc8+ Re8 34.Rc4 

I did not want to exchange Rooks, as I wanted a piece to help out on both sides of the board.

After the game, Stockfish 12 preferred 34.Rc3, but I am not sure why. Perhaps it was to anticipate the need to protect my h-pawn.

34...Ke7 35.b3 Kf6 36.Kf3 Kxf5 

37.Re4 Kf6 38.Rh4 h6 39.Rg4 g5 40.Re4 Ke7 41.Ra4 a6 42.Rc4 Bb8 

43.Rb4  Kd6 44.Rxb7 Kxd5 45.Rb6 a5 46.Rb5 Kxe6 47.Rxa5 Kd7 

Well, I had my connected passed pawns, but I could not see how to advance them safely, while protecting my Kingside.

48.Rb5 Kc6 49.Rf5 Re6 50.Ra5 Kb6 51.Rd5 Bd6 

It looked like my opponent was seeing a balanced game, too.

52.Rf5 Be7 53.Rd5 Bc5 54.Rf5 Bd6 55.Rd5 

After the game I asked Stockfish 12 if I could run my pawns. It said, Not Really: 55.a4 Be7 56.Kg2 Rd6 57.Rb5+ Ka6 58.Re5 Bd8 59.Re4 Ka5 60.f4 gxf4 61.Rxf4 Rd2+ 62.Rf2 Rd3 63.Rf5+ Kb4 64.Rb5+ Kc3 65.a5 Rd6 66.Kf3 Ra6 67.b4 Ra7 68.Rb8 Bg5 69.Rb6 Kc4 70.a6 h5 71.b5 Be7 72.Rb7 Rxb7 73.axb7 Bd6 74.Ke4 Kxb5 75.Kf5 Kb6 76.Kg5 Kxb7 77.Kxh5 and Black's Bishop will cover the Queening square for my remaining pawn. Draw.

55...Bc5 56.Rf5 Bd6 57.Rd5

draw agreed

A very good game from my opponent, who I outranked by 200 rating points.

Jerome Gambit: A Complicated Affair (Part 2)

 [continued from previous post]

perrypawnpusher - PasayDefence

"Piano Piano" tournament, Chess.com, 2020

18...Ng4 19.h3 Nf6 20.Kg2 Rd7 

Black can double his Rooks on either central file. He also avoids the possible pin of his Knight, if White plays Bg3-h4.

21.d4 Bb6 22.e5 Nd5 23.f5 

The "Jerome pawns" awaken.

23...Kg8 24.Rde1 

Wrong Rook. 24.Rfe1 would leave the d-pawn protected. 

24...Bc7 

This move puts more pressure on the center, but after the game the computer preferred 24...Rf7, as after  25.c4 Ne7 26.Re4 (protecting the d-pawn) the f-pawn falls to 26...Nxf5.

25.c4 Nb4 

His Bishop's retreat had made room at b6, and that is probably where the Knight should have gone.

26.e6 Rde7 27.Bh4 Nd3 

28.Bxe7

Miscalculating, and missing my chance. Stockfish 12's post mortem  was a bit tricky, but would have led to an advantage for White: 28.Rd1 g5 29.Bxg5 Rg7 30.h4 Nf4+ 31.Kf3 Nxe6 32.fxe6 Rxe6 when White would have been up 2 pawns.

28...Nxe1+ 29.Rxe1 Rxe7 30.d5 

Probably premature. Stockfish's take is 30.h4 h5 31.Rg1 Re8 32.Kf3 Bd8 33.d5 Be7 34.Rg5 b5 35.b3 Rd8 36.Ke4 Rd6 37.Ke5 Rd8 when White's King is much more actively placed, and the game would be about even. 

30...cxd5 31.cxd5 Bd6 

The "Jerome pawns" have been placed under lock and key.

I was at a loss for a plan to free them.

[to be continued]

Jerome Gambit: A Complicated Affair (Part 1)

 

The following Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) is one of my recent games from the "Piano Piano" tournament at Chess.com. It is a complicated affair, and I have included links to earlier games to provide some perspective.

My opponent played well. It was unclear to me at the end if my connected passed pawns were signs of hope or merely targets, and so I pursued the draw.

perrypawnpusher - PasayDefence

"Piano Piano" tournament, Chess.com, 2020

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Kf8 

Jerome's defense to the Jerome Gambit. Much of its history was recently presented in the post "Jerome Gambit: A Trip Down Memory Lane".

6.Nxc6 

This is the best continuation. I once delayed it a move: 6.O-O d6 7.Nxc6 bxc6 etc.,  perrypawnpusher - hdig, blitz, FICS, 2007 (1-0, 17)

6...dxc6 

This is the principled capture, as it prevents d2-d4 by White. Otherwise: perrypawnpusher - badhorsey, blitz, FICS, 2011, (1-0, 26)

7.O-O

I have also played 7.d3, which usually was followed by castling

perrypawnpusher - fortytwooz, blitz, FICS, 2010 (1-0, 29); perrypawnpusher - Jore, blitz, FICS, 2011 (0-1, 16); perrypawnpusher - Conspicuous, blitz, FICS, 2011 (1-0, 13); perrypawnpusher -Lark, blitz, FICS, 2011 (1-0, 12); and perrypawnpusher - pitrisko, blitz, FICS, 2011, (0-1, 30) 

I tried 7.Nc3  in perrypawnpusher - Ykcir, blitz, FICS, 2009, (1/2 - 1/2, 11). 

7...Be6 

Solid, already placing the Bishop in position to blockade White's e-pawn, if need be.

I have also seen 7...Ne7, in perrypawnpusher - smarlny, blitz, FICS, 2011,(1-0, 25), and the aggressive 7...Qh4 in perrypawnpusher - pitrisko, blitz, FICS, 2011 (0-1, 30) and perrypawnpusher - Al-der,"Italian Game Classic", Chess.com, 2019 (1-0, 26) 

8.d3 

After the game Stockfish 12 recommended the novelty 8.Qe2, which I hadn't even considered, i.e. 8...Nf6 9.c3 Kg8 10.d4 Bb6 11.Re1 Qe7 12.Nd2 h6 13.Nf3 to reduce Black's advantage.

I had played 8.Qf3+ in a long and difficult battle that I eventually lost, perrypawnpusher - CorH, blitz, FICS, 2009 (0-1, 74), 

8...Qh4 

Aggressively played.

I decided to move my Knight over to help protect the Kingside.

9.Nd2 Nf6 10.Nf3 Qh5 11.Bf4 Bg4 

Black's extra piece and better development counts more than a pawn that I might grab.

12.Bxc7 Rc8 13.Bg3

Given Black's upcoming plan to capture on f3, the Bishop might remain more relevant after 13.Bf4. 

13...Bxf3 14.Qxf3 Qxf3 15.gxf3 Kf7 

16.f4 

Reducing my Bishop to the status of a large pawn. My plan should have been to play f4-f5 as soon as possible, followed by f2-f4 - of course, that second move would have to come after I had been able to enforce d3-d4, or moved my King to unpin the f-pawn.

16...Rhe8 17.c3 Rcd8 18.Rad1 

I was not surprised, after the game, to see that Stockfish 12 rated Black - with the extra piece and powerful development - about 2 pawns better. There was still a lot of work to do.

[to be continued]

Jerome Gambit: Stockfish 12 Defeats Magnus Carlsen's Jerome Gambit?!

It has happened before.

Very early in the life of this blog I was taken in by a reference to the book "All or Nothing! The Jerome Gambit" by Chiam Schmendrick. I searched, but of course could not find the text, as neither it nor its author existed. 

Years later, I tried to track down a game that Alexander Alehine supposedly played, defending against the Jerome Gambit. Nothing.

Early last year I was trying to find the truth of the allegation in a newspaper chess column that Wilhelm Steinitz had lost to the Jerome Gambit the first time that he had faced it. Again, nothing.

Of course, I once did find a newspaper report of Emanuel Lasker's simultanous exhibition, where it was reasonably reported that he defeated a club player's Jerome Gambit, even if the game score was absent.

So, I was a bit unsure when I received the following email

Found this game from today before it was deleted off of Carlsen's page. Found it very instructional and interesting that stockfish 12 decided to go with the Jerome Gambit. Was wondering if you could write about it on your blog.

Well...

Let's suspend disbelief for a moment or two, and check out the game. Couldn't hurt, right?

The idea of the computer program being given "Jerome Gambit" odds by the World Champion is quite intriguing. 

Carlsen vs Stockfish 12
Chess.com, 2021

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

 

I am shocked to find the Jerome Gambit in Carlsen's opening repertoire, but he does like to explore unusual openings...

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 

Solid and sensible. You don't have to know much about the Jerome to make this choice. It might even be in Stockfish 12's book.

7.Qxe5 Qe7 

Alonzo Wheeler Jerome used this line to win two correspondence games from Daniel Jaeger in 1880. 

8.Qf4+ Nf6 9.d3 

A bit odd. I gave the game to my Stockfish 12, and with a minute per move in "blunder check" mode, it chose 9.Nc3. In fact, when given the position after move 8 and set to "infinite analysis" it immediately chose 9.Nc3 and did not waver.

I don't know what time control the game was played at but it had to be quite fast for Carlsen to "overlook" the best move.

9...Kf7

Practical and cautious. White's best move is not taking the pawn at c7, so this might be another reason for Black's choice.  

10.Qxc7

For the record, according to The Database this is a novelty, if not a particularly good one. Definitely not world class.

10...a6 11.f4 

This is the kind of Jerome-ish move that I would make, but it's a blunder. My version of Stockfish 12 again finds 11.Nc3 instantaneously. Strange. 

Is this the "Play Magnus" software, set to an early age?

11...Ng4 

My skepticism rises. Stockfish 12 overlooks 11...Nxe4!? ?

12.f5 Qh4+ 13.g3 Qe7 14.h3 Nf2 

15.O-O 

Cute - and foolish, what they call "castling into it". Perhaps he could hold on with 15.Rh2.This is beginning to look like a "banter blitz" game where White is wandering off topic to discuss his suggestions for the Fornyings- og administrasjonsdepartementet.

15...Nxd3+ 

Stronger was 15...Nxe4+, but it doesn't matter, as White steps into a forced checkmate.

16.Kg2 Qxe4+ 17.Kh2 Qe2+ 18.Kh1 Qxf1+ 19.Kh2 Qg1 checkmate

I'm always interested in seeing Jerome Gambit games, but I'm still a bit suspicious about the provenance of this one. More evidence, please.

Jerome Gambit: Crazyhouse

Thanks to this Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) blog, every day I learn something new.

Recently I received an email from Hüseyn Əkbərov, who has tried out playing a Jerome-inspired opening in the "crazyhouse" chess variant at lichess.org.

Here is some starting information about Crazyhouse that I found at Wikipedia:

All the rules and conventions of standard chess apply, with the addition of drops, as explained below.

A captured piece reverses color and goes to the capturing player's reserve, pocket or bank. At any time, instead of making a move with a piece on the board, a player can drop a piece from their reserve (a piece in there is considered “held” or “in hand”) onto an empty square on the board.

Let's look at short game.

Nyes - aylinal

10 0 crazyhouse, lichess.org, 2021

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 

The Semi-Italian opening.

4.Bxf7+ 

One of the variations I have referred to as an "impatient Jerome Gambit" as White sacrifices the Bishop before Black plays ...Bc5.

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6 

7.P@f5+  

Instead of moving a piece, White drops a captured pawn - that has changed sides - onto the f5 square.

7...Kd6  8.P@c5+  

Again, instead of moving a piece, White drops a captured pawn - that has changed sides - onto the c5 square.

8...Kxc5  9.f6  Qxf6 10.d4 Kxd4  

11.Be3+  Kxe4  12.Nc3 checkmate

Very interesting!

(By the way, Stockfish 12 has been modified at lichess.org in order to analyze crazyhouse. I haven't added its annotations to this game, but I have to mention that its recommendation for Black on move 6 was to drop a Knight - captured from White, changing colors - onto g6.)

 

Jerome Gambit: Interesting Checkmates

It is fun to play over exciting Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) and Jerome-inspired games. It can be even more fun to look at the interesting checkmates they produce. Here are a few recent ones.

This one took only 17 moves

ReflectionOfPower - Jonfern, lichess.org, 2021

Here is another that seems almost peaceful. RIP.

jbrokenleg - ariz1915, Chess.com, 2021

There's a bit of humor and conciseness in the next one.

Zlaati - Carlohln, Chess.com, 2021

This one is a bit odd for a Jerome Gambit - can you see why?

karlconroy - norfolk and good, DailyChess, 2020

Jerome Gambit: A Trip Down Memory Lane (Part 2)

 [continued from previous post]

Gamophobe - shatrunj646

15 10 blitz, lichess.org, 2021

9...Nd4 

Black threatens the brutal Knight fork of King, Queen and Rook, forcing White's Knight to go to a3, instead of being able to support his e-pawn with Nc3. As we will see, there are some tactical tricks involved, but probably 9...Nf6 was better in the long run.

10.Na3 Re8 

Pressuring the e-pawn. The problem with 10...Qxa3, removing the defender and planning to fork the Queen and King, is that White's recapture is with check, 11.Qxa3+ (stronger than 11.Qxd4).

11.d3 Nf6 

Now White could answer 11...Qxa3 with 12.Qf4+ (again, stronger than 12.Qxd4), disrupting the planned fork.

12.f3 

Some times in the Jerome Gambit White's pawns race forward to spearhead an attack. Other times, they patiently build a fortress, and challenge Black: You are better developed, why don't you attack?

There is not a lot of attack available for the second player right now, however. He might as well try 12...Qxa3 13.Qxd4 Qd6 where each player has let go of an ineffective piece.

12...b5 

Targeting the wayward Knight, but the plan does not work.

13.O-O b4 14.Nc4 Nxc2 

This is the fork that he has been threatening, but it involves a miscalculation.

15.Nxd6 Nxe3 16.Nxe8 Nxf1 17.Nxf6 gxf6 18.Kxf1 

White has a 2 pawn advantage. The Bishops-of-opposite-colors endgame - once the Rooks leave the board - would be a challenge to draw.

18...Bb5 19.Ke2 Kf7 20.a4 Ba6 21.Be3 Rd8 22.Rd1 Rd7 23.Bxa7 c6 24.Bc5 b3 25.Ke3 Ke6 26.d4 f5 

Black has to keep playing; perhaps the clock will be his friend?

27.g4 fxg4 28.fxg4 Rg7 29.d5+ cxd5 30.exd5+ Kd7 31.h3 h5 

Following the advice: When you are ahead, exchange pieces; when you are behind, exchange pawns - but White will soon have 3 passed pawns, and winning slowly is still winning.

32.Rg1 Bc4 33.Kd4 Be2 34.g5 Rg6 35.h4 Ra6 

Black can grab both Rook pawns, but it would not stop a third pawn from promoting.

36.g6 Rxa4+ 37.Ke5 Bg4 

Shielding the g-pawn from the protection of its Rook.

38.g7 Ra8 39.Bf8 

Cute: the Bishop shields the pawn from the enemy Rook's attack, allowing it to Queen.

39...Re8+ 40.Kf4 Black resigned 

Nice, solid work bringing home the full point.