Jerome Gambit: Deep Dive (Part 1)

It has been a while since I took a deep dive into a Jerome Gambit game, so I decided to inspect a 2019 game played by ZahariSokolov, online at FICS. He has 410 games in The Database, scoring 50%. Many of his games explore important lines, and can be quite complicated.

ZahariSokolov - GizmoClass
FICS, 2019

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

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ke6

What could be more understandable than wanting to hold on to your extra 2 pieces? It is too early in the game to assess whether GizmoClass is naive or knowledgeable in making this move choice. (The Database has 1,121 games with this position; White scores 54%.)

7.Qf5+ Kd6 8.f4 Nf3+ 

Aha! The player of the Black pieces knows a bit about the Jerome Gambit, or he has a solid creative streak about him.

This Norton Defense, which first appeared in Jerome - Norton, correspondence, 1876 (0-1, 42), was referred to as "a new departure" in the September, 1876 issue of the American Chess Journal. "[...Qf6] is the usual play. The text move prevents White from castling."

The "usual play" appeared in Alonzo Wheeler Jerome's analysis of the Jerome Gambit that appeared in the April 1874 issue of the Dubuque Chess Journal; as well as in the games Jerome - Shinkman, Iowa, 1874 (0-1, 21) and Jerome - Brownson, Iowa, 1875 (1-0, 43).

The text move, 8...Nf3+, can be found in 14 games in The Database, with White scoring a deceiving 71% (Komodo 10 assesses the position as even). It can be contrasted with 8...Qh4+ 9.g3 Nf3+ , the "Nibs" defense, which dates back at least as far as 1899. (The Database has 54 games; White scores 54%.)

Interestingly enough, despite Black's apparent knowledge of the Jerome Gambit, only one other game by GizmoClass appears in The Database - a 83-move draw (6...Kf8) played against ZahariSokolov, 6 months earlier. Did somebody "book up", afterwards?

9.gxf3 

Capturing the Knight is best, but even the Gambit's creator slipped and chose 9.Kf1 in a game, instead: 9...c6 10.gxf3 Qe7 11.b4 Bb6 12.Bb2 Kc7 13.Qe5+ Qxe5 14.Bxe5+ d6 15.Bxg7 Bh3+ 16.Ke2 Bg2 17.Rd1 Ne7 18.Bxh8 Ng6 19.d4 Rxh8 20.Kf2 Nxf4 21.c3 Rg8 22.Nd2 Kd7 23.Ke3 Rf8 24.Rg1 Bd8 25.Kf2 Rg8 26.Ke3 Nh3 27.f4 Nxg1 28.Rxg1 Rg4 29.Nf1 Bh3 30.Ng3 Rh4 31.Nf5 Bxf5 32.exf5 Bf6 33.Rg3 Rxh2 34.a4 Rh1 35.a5 Re1+ 36.Kf3 Re7 37.Rh3 c5 38.bxc5 dxc5 39.Rh6 cxd4 40.cxd4 Bxd4 41.f6 Rf7 42.Ke4 Bxf6 and Black won, Jerome,A - Norton,D, correspondence, 1876.

To be fair, I should mention that I have played 9.Kf1 a couple of times, too - perrypawnpusher - igormsp, blitz, FICS, 2011 (1-0, 13), and perrypawnpusher - rheapennata, blitz, FICS, 2012 (1-0,12) - and ZahariSokolov has gotten away with 9.Kd1, as well in  ZahariSokolov - LAVAL, FICS, 2015 (1-0, 32). I have already argued, elsewhere, that "Good luck is better than a license to steal."

9...Qh4+ 10.Kd1

An earlier mistake that he shied away from was 10.Ke2, as in ZahariSokolov - Quarte, FICS, 2015 (0-1, 17); but it is hard not to enjoy the follies of an early computer against Jack Young: 10.Ke2 Qf2+ 11.Kd3 Qxf3+ 12.Kc4 b5+ 13.Kxb5 Rb8+ 14.Ka5 Bb4+?! 15.Ka4 Qxh1?? 16.Qe5+ Kc6 17.Qd5+ Kb6 18.Qxb5 checkmate

How should Black proceed?

Of course, 10...Qe7 11.Qd5 checkmate, is not optimal, at least for the defender, ZahariSokolov - GhengusFungus, FICS, 2014. 

Instead, 10...Qf2 allows White to sue for peace by initiating repeated checks, e.g. 11.Qe5+ Kc6 12.Qd5+ Kb6 13.Qb3+ Ka6 14.Qa4+ Kb6 15.Qb3+ Kc6 16.Qd5+, etc. Actually, the American Chess Journal editor William Hallock, commenting on Jerome,A - Norton,D, correspondence, 1876 (see above) wrote that after 10...Qf2 "Black has the better position". I challenged this notion in perrypawnpusher - Sir Osis of the Liver, Jerome Gambit 3 thematic tournament, ChessWorld.net, 2008, and, when my opponent was unwilling to split the point, I went on to win (1-0, 19).

ZahariSokolov had already faced 10...Nf6, which led to an edge for White, but he lost after an unusual and unfortunate oversight: 11.e5+ Kc6 12.exf6 d6 13.Nc3? Bxf5 14.d3 gxf6 15.a3 Qf2 16.Bd2 Qxf3+ 17.Kc1 Be3 18.Bxe3 Qxe3+ 19.Kb1 Qxf4 20.Ka2 Be6+ 21.b3 Qd2 22.Kb2 Rhg8 23.Ne4 Qe3 24.Rae1 Qd4+ 25.Ka2 Bxb3+ 26.Kxb3 Rg2 27.Rd1 Qb6+ 28.Kc3 Rag8 29.Nxf6 Qa5+ 30.Kb3 Qb5+ 31.Kc3 Qe5+ 32.d4 Qxf6 resigned, ZahariSokolov - panpanOneTwo, FICS, 2018.

Best is probably 10...Ne7, but that is not what GizmoClass played.

 [to be continued]

Jerome Gambit: Against the Titans (Part 1)

Sitting at the computer the other day, I suddenly decided to challenge one of the programs to game of chess. I played the Jerome Gambit, of course. I've done this before - see "Jerome Gambit: Artificial Piffle" and "Contempt?!" 

Quickly we raced toward one of the more deadly refutations, a trip down memory lane for me that was lined with past escapes - and non-escapes. Suddenly, my opponent came up with a novelty that undid all of its hard work. The rest of the game was a combination of me timidly moving forward, while the computer seemed to lose much sense of things. Come, see. 

perrypawnpusher - Chess Titans
casual game, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5. Nxe5+ Nxe5 6. Qh5+ Ke6 

7.Qf5+ Kd6 8.f4 Qh4+ 

The first example that I have found of this move appeared in the American Chess Magazine of June 1899, in a satirical piece titled "A CHESS SCRAP" by "R.F.", which presented a supposed new-fangled thing - a chess game played over the telephone. The move is not a joke, however.

Interestingly enough, when I reported on last year's game against Chess Titans, I noted

I was pretty sure that my opponent was not seriously booked up on the Jerome Gambit, and that the killer move 8...Qh4+!? was not going to show up now.

Back then, it played the insufficient 8...g6. This time, it appeared to be better prepared.

9.g3 Nf3+ 

Black can quietly remove his Queen to f6, but the text is more aggressive.

10.Kf1

I have also played 10.Kd1: perrypawnpusher - electrahan, blitz, FICS, 2009 (1-0, 35); perrypawnpusher - Banassi, blitz, FICS, 2009 (1-0, 28); perrypawnpusher - fortytwooz, blitz, FICS, 2010 (1-0, 11); perrypawnpusher - javistas, blitz, FICS, 2010 (1-0, 11); and perrypawnpusher - thinan, blitz, FICS, 2010 (1-0, 11).

The text is best, but, it still leaves Black better.

10...Nxh2+

As I have suggested, "Black can get away with this, but it is not best."

I actually met 10...Qh3+ (likely a mouse slip) twice, perrypawnpusher - rjbriggs, blitz, FICS, 2011(1-0, 10) and perrypawnpusher - inansoy, blitz, FICS, 2014 (1-0, 51).

I have had trouble in the past with 10...Qh6 -  perrypawnpusher - Temmo, Jerome Gambit thematic, ChessWorld.net, 2008 (0-1, 43) and 10...Qf6 -  perrypawnpusher - james042665, blitz, FICS, 2008, (0-1, 18); and perrypawnpusher - HarlemKnight, blitz, FICS, 2014}(0-1, 24).

I was familiar with the text move, having found it in the game Born Loser - NN, 2005 (1-0, 37) in White's unique book, Unorthodox Chess (2005).

11.Kg2

11...Qd8 

An odd move. I have faced a number of alternatives:

11...Qg4 (probably best) in perrypawnpusher - jgknight, blitz, FICS, 2011 (1-0, 68);

11...Nf6 12.gxh4 in perrypawnpusher - mikelars, blitz, FICS 2011 (1-0, 12);

11...Qe7 12.Qd5 checkmate, perrypawnpusher - intssed, blitz, FICS, 2010 (1-0, 12);

11...Qh6 in perrypawnpusher - JTIV, blitz, FICS, 2010 (1-0, 32); 

11...Qf6 in perrypawnpusher - IlToscano, Chess.com, 2016 (1-0, 18); and

11...Ne7 in perrypawnpusher - constipatedguru, blitz, FICS, 2017 (1-0, 20)

12.Qd5+ 

This move is good and easy to find. After the game, however, Stockfish 10 recommended that I ignore both the Bishop on c5 and the Knight on h2, at least at first, and play 12.Nc3!? The point is that neither Black piece can move to safety effectively - and a couple of possible Bishop moves would lead to checkmate in 2 or 3 moves.

The computer recommends 12...Nf6, which falls right away to the fork 13.e5+. The alternative, 12...Qe8, simply allows 13.Qd5+, and the Bishop will fall next move, and the Knight soon thereafter. White is better, in any event, but the computer is always looking for a "better better."

12...Ke7 13.Qxc5+ d6 

[to be continued]

Jerome Gambit: Needing More Than A Parasol

If it's raining outside, you can put on a hat, rain coat, and boots, and carry an umbrella. That will help. If you only take out a little parasol from the last cocktail you had - it won't provide much shelter.

So it is, when you are facing the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+). You may not need the most exacting defense - say, Whistler's, or the "annoying defense", or even Jerome's defense - but you will need to have some kind of defense prepared. Otherwise, you will just get soaked.

Witness the following game. It shows how White can wrap things up early.

Wall, Bill - Dippoldi
PlayChess.com, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.d4 

6...Bb4+ 

This can work, if it is followed up correctly.

7.c3 Bd6

According to The Database, Black has won every time he has played the alternative, 7...Qh4!? - 13 times - except for the 2 times that it was played against Bill Wall.

8.dxe5 Bxe5

Bill points out that 8...Bf8 and 8...Be7 were the way to go. White would have only a small advantage, if any.

9.Qd5+

Also successful was 9.Qh5+  - 9...Ke6 10.Qf5+ Kd6 11.Na3 Ne7 12.Nc4+ Kc6 13.Qxe5 d6 14.Na5+ Kd7 15.Qg5 c6 16.Nc4 b6 17.Bf4 Ng6 18.Qf5+ Kc7 19.Qf7+ Qd7 20.Bxd6+ Kb7 21.Qf3 b5 22.Ne5 Nxe5 23.Bxe5 Ka6 24.g3 Bb7 25.a4 c5 26.axb5+ Kxb5 27.O-O Rhe8 28.c4+ Kc6 29.Rad1 Rxe5 30.Rxd7 Kxd7 31.Qf7+ Kc8 32.Qf8+ Kc7 33.Qxg7+ Kd6 34.Qxb7 Ree8 35.Rd1+ Ke6 36.Qd7+ Kf6 37.Rd6+ Ke5 38.Rd5+ Kf6 39.Rf5+ Kg6 40.Qf7+ Kh6 41.Rh5 checkmate, Sir Osis of the Liver - Crusader Rabbit, Jerome Gambit Tournament 4, ChessWorld, 2009. 

9...Kf6

Just about as effective as 9...Kf8, seen in Wall, - Holzkopp, PlayChess.com, 2017 (1-0, 27).

10.f4

Deadly enough was 10.h4 - 10...Ne7 11.Bg5+ Kg6 12.Qxe5 d6 13.Qxe7 Qxe7 14.Bxe7 Re8 15.h5+ Kf7 16.Bg5 Rxe4+ 17.Be3 Bf5 18.Nd2 Re6 19.O-O-O a5 20.Rde1 Rae8 21.Nb3 Re5 22.Nd4 Bg4 23.Kd2 c5 24.Nb5 Rd5+ 25.Kc1 c4 26.Nc7 Black resigned, HauntedKnight - anaribusm, FICS, 2012.

10...Qe7

Also coming to no good end: 10...Kg6, as in Wall,B - Guest6953174, PlayChess.com 2016 (1-0, 15) and 10...c6 11.fxe5+ Kg6 12.Qd6+ Kf7 13.O-O+ Black resigned, Wall,B - Guest11386950, PlayChess.com, 2019.

11.fxe5+ Qxe5

Even LuigiBot could not escape, trying 11...Kg6 - 12.O-O Nh6 13.Rf3 Rf8 14.Rg3+ Kh5 15.Qd1+ Rf3 16.Qxf3+ Kh4 17.Rh3 checkmate, Fandral - LuigiBot, FICS, 2013. 

12.O-O+ Black resigned

Jerome Gambit: Worst vs Best (Part 4)

So far: no confirmation of a Steinitz loss to the Jerome Gambit; very likely a win by Lasker against the Jerome, but the game is unfindable - and, what about Alekhine facing the Jerome Gambit?

I turned to my trusty Big Database, did a position search with a White pawn on e4, a Black King on e8, and a White Bishop on f7. This turned up a number of games, only one of which comes near to what we are looking for.

Alekhine, Alexander
NN2 - Alekhine, Alezander, Kislovodsk, 1907

1.e4 e5 2.Nf3 Nc6 3.d4 exd4 4.Bc4 Bc5 5.Ng5 Ne5 6.Bxf7+ Nxf7 7.Nxf7 Kxf7 8.Qh5+ g6 9.Qxc5 d6 10.Qxd4 Nf6 11.Nc3 h6 12.Nb5 Nxe4 13.Bxh6 Rxh6 14.Qxe4 Qg5 15.Qc4+ Be6 16.Qxc7+ Kg8 17.Qxd6 Bc4 18.Nc7 Rd8 19.Ne6 Qa5+ 20.b4 Rxd6 21.bxa5 Rxe6+ White resigned

Alas, this is an example of  the Sarratt Attack or the Vitzthum Attack, which has a lot of action going on at f7, and whichI have looked into in this blog as a possible precursor or inspriation to the Jerome Gambit.

Of course, The Database does have a couple dozen Jerome Gambit games by "AAlekhine", but those are from 2007 and 2008, by an online player playing in Jerome Gambit thematic tournaments at ChessWorld.net. 

Jerome Gambit Declined: Still Grumpy

I'm still feeling grumpy about the Jerome Gambit Declined (see my previous post, "Jerome Gambit Declined: Table Turned"), but it's an even-handed grumpiness. Let me show you what I mean.

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ Ke7

This is how my most recent opponent played. Declining the offer of the Bishop is rare, and doing so by moving the King to e7, instead of f8, is even more rare.

5.Bxg8

This was a suggestion from my last post, and it should be considered, if only because it "solves" the issue of where, otherwise, to retreat the Bishop.

5...Qxg8

The correct recapture, but only seen in 1 of 8 games in The Database. The problem with 5...Rxg8, seen as early as Drewbear - AAlekhine, Jerome Gambit thematic tournament, ChessWorld.net, 2007 (1-0, 33) is that White replies 6.d4, threatening to skewer Black's King and Queen with 7.Bg5+, thus winning a piece.

Alas, only two players responded correctly to 5...Rxg8 - Drewbear, in 2007, and Bill Wall, in 2015 - the latter, the game ended after 10 moves.

As for the text, I have only one game to guide me, a lightning game from 2008. We can follow that for a bit.

6.d4

This is kind of funny. Stockfish 10 prefers 6.Nc3 d6 7.Nd5+ Kd8 8.d4 exd4 9.Bg5+ Kd7 10.0-0, giving up a pawn to do - what? He develops his Bishop, forcing Black's King to block Black's light-squared Bishop, which, in turn, blocks Black's Rook... Certainly a Jerome Gambit strategy if ever there was one.

6...exd4 

7.Bg5+

Striking at the King, although, with the Black Queen at g8, the move is not as strong. Probably 7.c3 was better, when Black could try 7...dxc3 or 7...d5. White would have the safer King, but he would be playing quite a different game than the usual Jerome Gambit.

7...Kd8 8.0-0

Reasonable, although the computer recommends 8.c3. 

8...Be7

Simply allows White to recover his pawn.

9.Bf4

Fine, but 9.Bxe7 Kxe7 10.Nxd4 was hard to argue with. 

9...Qf7

Now a tactical skirmish advanced White's game.

10.Bxc7 d6 11.Nxd4 Kd7 12.Nxc6 Kxc7 13.Nxe7 Qxe7 14.Re1 Rf8

Here, the clock seemed to step in.

15.e5 Qh4 16.Qe2

Instead, 16.Qxd6 was checkmate, but, remember, this was a bullet game. White won at move 32.

[This is blog post #2,750. Thanks for reading!]

Jerome Gambit: My Opponent Knows What He Is Doing (Part 1)

While it looks like I am headed for a 3rd place finish (out of 6) in the 3rd round of the "Italian Battleground" tournament at Chess.com, I will at least have some Jerome Gambit tales to tell from the experience.

I have already shared my 3rd round game perrypawnpusher - Abhishek29, "Italian Battleground", Chess.com, 2019 (1-0, 35) - my second win in this tournament against that opponent, having defeated him in in Round 1 - see perrypawnpusher - Abhishek29, "Italian Battleground", Chess.com, 2019 (1-0, 19).

The current game is a rematch with an opponent that I faced in Round 2 - see perrypawnpusher - warwar, "Italian Battleground", Chess.com, 2019 (1-0, 39). I was a bit concerned, the way "real" chessplayers are concerned about "real" chess openings: how much had he learned about the Jerome Gambit in the meantime?

It turned out to be an interesting battle between the "Jerome pawns" and the defender's extra piece, but, most of all, between someone who had prepared the opening and someone who had to improvise in the middlegame and endgame.

perrypawnpusher - warwar
"Italian Battleground", Chess.com, 2019

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

When the game was over, the Chess.com site offered to do a quick computer analysis. Not surprisingly, this move was labelled a blunder.

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 

warwar adopts the Jerome Defense, first suggested by Alonzo Wheeler Jerome in his analysis in an article in the Dubuque Chess Journal of July, 1874. It was first played in Jaeger - Jerome, correspondence, 1880 (1-0, 40).

Interestingly enough, Abhishek29 was playing the same defense against me in the same round, too. My record, at that point, against the line was 25 - 6 - 3, a decent 78% score.

7.Qxe5 d6

As I wrote in the article that I had prepared for Kaissiber (unfortunately, never published)

The defenses 6…Kf8 and 6…Ng6 have had their supporters and detractors, depending on how each evaluated the alternatives – was it better to hold onto a little material and avoid complications, or to enter them confidently, knowing that they would turn the game even more in your favor? 

Jerome (DCJ 7/1874) first suggested 6…Kf8. He followed it with 7.Qxe5 d6 8.Qf4+ Nf6 9.c3 Kf7 10.d4 Bb6 11.e5 dxe5 12.dxe5 Re8 13.0-0 Kg8 14.exf6 Qxf6 15.Qxf6 gxf6 16.Bh6 “and White has a pawn ahead.” (Actually, the game is even; but Jerome missed that earlier his 11.e5 was premature, as after the pawn exchange 12…Qd3 would be crushing – Paul Keiser, personal communication. The alternative 8…Ke8 was seen in 5 games in the Yetman – Farmer 2008 match.) 

As Sorensen (NS 5/1877) did not mention 6…Kf8, it was not touched upon by other writers until Freeborough and Rankin (COAM, 1889) suggested that it led to a safe game for Black, giving the line 7.Qxe5 Qe7 8.Qf5+ Ke8 9.Nc3 d6 10.Qf3 Qf7 (or 10...Nf6!) 11.Qe2 Nh6 (or 11...Ne7 or 11...Nf6) with “a superior position or game” to Black. 

A hundred years after Jerome, Harding, in his Counter Gambits (1974), varied, after 7.Qxe5 d6 8.Qf4+ Nf6 with 9.d3 Kg8 10.Nc3 Qe8 11.Be3 Bb4 12.0-0 Be6 13.Ne2 Qh5 14.Nd4 Bd7 15.c3 Bc5, advantage to Black. His comment in The Italian Game (1977) was that after 7…d6, White was left “without genuine compensation for his piece.” He sagely recommended the 6…Kf8 line as “other lines would allow White to attack the exposed black king or to win back the sacrificed material.”

8.Qg3 

I experimented with Jerome's 8.Qf4+ in perrypawnpusher - Capt. Mandrake, Jerome Gambit 3 thematic tournament, ChessWorld.com, 2008 (1-0, 9) and perrypawnpusher - LeeBradbury, "Italian Game" Thematic, Chess.com, 2012 (1-0, 36).

I also tried 8.Qc3 in perrypawnpusher - Raankh, blitz, FICS, 2009 (0-1, 22).

There is not much difference in the strength between these two moves and the text, or even 8.Qh5, if Stockfish 9 is to be believed.

8...Nf6 9.Nc3 Kf7 

Abhishek29 chose 9...Be6 in our Round 3 game.

Years ago, perrypawnpusher - klixar, blitz, FICS, 2007 (1-0, 33) continued 9...Ng4.

perrypawnpusher - truuf, blitz, FICS, 2011 (0-1, 32) continued with the text move.

[to be continued]

Jerome Gambit: Who'd A Thunk It?

I just received another Jerome Gambit game played on the internet by Vlasta Fejfar ("vlastous"). The following game show the need for patience in certain lines of that wild, crazy attack. A certain amount of sitzfleisch helps, too. After a period of calm, White suddenly activates his Rooks, and Black does not react well to the danger.

[By the way, this is post #2,500 on this blog. As Mortimer Snerd - or Edgar Bergen - said, "Who'd a thunk it?"]

vlastous - Nyanyiwa
internet, 2017

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8 7.Qxe5 d6 8.Qf4+ Qf6

The defense 6...Kf8 is solid and sensible. It can lead to a position where the Queens come off the board before a dozen moves have been played. "Objectively" Black's extra piece is worth more than White's two extra pawns, but in the rough-and-tumble of club play - especially when the first player has knowledge or experience of such lines - there is play to be had for the gambiteer.

9.d3 Qxf4 10.Bxf4 Nf6 11.Nc3 

White has his two "Jerome pawns". Black's extra piece gives him the "two bishops" which are helpful in open positions.

From a psychological point of view, White should consider keeping the game closed, developing his pieces, increasing his control of space - but, otherwise, acting as if Black is the attacker, and letting him make the first mistake.

Other ideas:

11.c3 Bb6 (11...h6 12.Nd2 g5 13.Bg3 Nh5 14.d4 Bb6 15.Nc4 Nxg3 16.hxg3 Kg7 17.f3 Be6 18.Nxb6 axb6 19.a3 h5 20.Kf2 h4 21.gxh4 Rxh4 22.Rxh4 gxh4 23.Rh1 Rh8 24.f4 Bg4 25.f5 Kf6 26.Ke3 d5 27.Kf4 Be2 28.e5+ Kg7 29.g4 hxg3 30.Rxh8 g2 31.Rh3 g1=Q 32.Rg3+ Qxg3+ 33.Kxg3 Kh6 34.Kf4 Bh5 35.e6 Kg7 36. Ke5 c6 37.f6+ Kg6 38.f7 Kg7 39.Kd6 Bg6 40.Ke7 Black resigned,  Philidor1792 - guest2052, Internet, 2012) 12.Nd2 Bd7 13.Nc4 Kf7 14.Nxb6 axb6 15.f3 Rhe8 16.Kf2 b5 17.a3 Be6 18.Ke3 Rad8 19.d4 Bb3 20.Kd2 h6 21.Rae1 g5 22.Be3 Nh5 23.g3 Kg6 24.Re2 Rf8 25.Rf2 Rf7 26.f4 gxf4 27.gxf4 Rdf8 28.Rg1+ Kh7 29.f5 Rg8 30.Rxg8 Kxg8 31.Bxh6 Nf6 32.Rf4 Rh7 33.Bg5 Rxh2+ 34.Ke3 Kf7 35.Rh4 Rxh4 36.Bxh4 c6 37.Kf4 Bc2 38.e5 Nd5+ 39.Kg5 dxe5 40.dxe5 Nc7 41.Bg3 Bd3 42.e6+ Nxe6+ 43.fxe6+ Kxe6 44.Kf4 Kd5 45.Ke3 Bf1 46.Kd2 Kc4 47.Kc1 Kb3 48.Bf2 drawn, Philidor 1792 - guest2498, bereg.ru 2014; 

11.O-O Kf7 (11...Bg4 12.Nc3 Bd4 13.Be3 Bxc3 14.bxc3 b6 15.f3 Be6 16.d4 Re8 17.Bf4 Nh5 18.Be3 Kf7 19.Rfb1 Rhf8 20.Bc1 Kg6 21.d5 Bd7 22.Bd2 c6 23.c4 Nf4 24.Kh1 h6 25.Rb3 Rc8 26.g3 Ne2 27.Rd3 c5 28.c3 b5 29.Re3 bxc4 30.Rxe2 Rxf3 31.e5 dxe5 32.Bxh6 gxh6 33.Rxe5 Rxc3 34.Re7 Rd8 35.Kg1 Rc2 36.Rb1 Rxa2 37.Rb7 c3 38.Rb1 c2 39.Rbe1 Bh3 40.R7e5 c4 41.Rc1 Rb8 42.Re2 Rbb2 43.Kf2 a5 44.d6 Kf6 45.Kf3 c3 46.Ke3 Bf5 47.Kd4 Rb3 48.d7 Ra4+ 49.Kc5 Bxd7 50.Rcxc2 Rb5+ 51.Kd6 Rd4+ 52.Kc7 Rd3 53.Ra2 Bg4 54.Re4 Rd2 55.Rf4+ Kg5 56.Raa4 Bh3 57.Rf8 c2 58.Rc4 Rxh2 59.Rg8+ Kf6 60.Rf8+ Kg7 61.Rf3 Be6 62.Rcc3 Re2 63.Kd6 Rb6+ 64.Kc5 Rb1 65.Kd4 Rd1+ 66.Kc5 Re5+ 67.Kc6 Bd5+ 68.Kd6 Re6+ 69.Kd7 Rc6 70.Rfe3 Kf6 71.Rxc2 Bf3+ 72.Rd2 Rxd2+ 73.Rd3 Rxd3+ 74.Ke8 Rc8 checkmate, GNUChess - GNUChess, OS-RGCX-182777, 2003) 12.Nc3 Bd7 13.Be3 Bxe3 14.fxe3 Ke7 15.Rf3 Rhf8 16.Raf1 c6 17.d4 Ng4 18.Rxf8 Rxf8 19.Rxf8 Kxf8 20.Nd1 Be8 21.h3 Nf6 22.Nc3 Bg6 23.e5 dxe5 24.dxe5 Ne4 25.Ne2 Ke7 26.Nf4 Bf7 27.b3 g5 28.Nd3 c5 29.g4 c4 30.Nb2 cxb3 31.axb3 Ke6 32.Nd3 Kd5 33.Kf1 Nc5 34.c4+ Kc6 35.Ke2 Nxb3 36.Nb2 Nc5 37.Kf3 a5 38.e4 a4 White resigned, blackburne - Argento1960, ChessWorld.net, 2004; and

11.Be3 Bb4+ 12.Bd2 Bxd2+ 13.Nxd2 Kg8 14.O-O-O c5 15.Nc4 Ne8 16.Ne3 Be6 17.h4 Nf6 18.h5 b5 19.h6 g5 20.f3 Kf7 21.d4 b4 22.Rhe1 Rhe8 23.g3 Ke7 24.d5 Bd7 25.e5 dxe5 26.Nc4 Nh5 27.g4 Bb5 28.d6+ Kd8 29.d7 Rf8 30.Nd6 Bc6 31.gxh5 Bxf3 32.Rd3 e4 33.Rd5 Kxd7 34.Nxe4+ Kc6 35.Rxc5+ Kb6 36.Rc4 Rae8 37.Rxb4+ Ka5 38.a3 Rf4 39.Nxg5 Rxe1+ 40.Kd2 Re2+ 41.Kd3 Rxb4 42.axb4+ Kxb4 43.Nxf3 Re6 44.c3+ Ka5 45.b4+ Ka4 46.b5 Rxh6 47.c4 Rxh5 48.Nd2 Kb4 49.Nf1 Rh3+ 50.Ne3 Rxe3+ 51.Kxe3 Kxc4 52.b6 axb6 53.Ke4 b5 54.Kf4 b4 55.Kg5 b3 56.Kh6 b2 57.Kxh7 b1=Q+ 58.Kh6 Qf5 59.Kg7 Qg5+ 60.Kf8 Kc5 61.Ke8 Qg7 62.Kd8 Kd6 63.Ke8 Qg8 checkmate, GNUChess - GNUChess, OS-RGCX-182777, 2003. 

11...a6 12. f3 Kf7

Things quickly went south for Black after 12...Be6 13.Bg3 g5 14.e5 dxe5 15.Bxe5 Kf7 16.Bxf6 Kxf6 17.Ne4+ Black resigned, Wall,B - Guest2651667, PlayChess.com, 2015. 

13.Bg3 Re8 14.Bf2 Bb4 15.a3 Bxc3+ 16.bxc3 b6

Black has surrendered the Bishop pair to injure White's pawn structure. He still has a long way to go to collect more than a half point, however. In the meantime, White startssome action on the Kingside.

17.Kd2 Bd7 18.g4 h6 19.h4 d5 20.g5 hxg5 21.hxg5 Ng8 

White is ready for some action on the Kingside, starting with a surprise.

22.g6+ Kxg6

Immediately, Black slips. He would have done better side-stepping the pawn with 22...Ke6, but he misses White's plan (perhaps because White has been so "quiet" with his play. The capture allows White a useful gain of tempo in response.

23.Rag1+ Kf7 24.Rh7 Ke7 

You can see the rest of the game from here. Whites Rooks spring to life.

25.Rgxg7+ Kd6 26.Rxd7+ Kc6 27.Rxc7+ Kb5 28.exd5 Nf6 

Black is suddenly 4 pawns down, 3 of them passed, but he hopes to use this Knight fork to win one back. Alas he slips.

29.Rh6 Nxd5 30.c4+ Black resigned