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 a5. I 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] 

Brave Play

Using the opening explorer at lichess.org mentioned in "New Resource" in the previous post, I came across the following very exciting game. The Jerome Gambit player may well be familiar with this opening, in which case I feel I owe him some attention, some support, some encouragement and some assistance for his brave play. The games in the notes are well worth playing over, as they contain relevant themes of attack and defense.

killer23111953 - slava55
10 0 blitz, lichess.org, 2016

1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 

The Semi-Italian Game.

4.Nc3 Bc5 5.Bxf7+ 

The Semi-Italian Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.Qh5+ Ke6 8.Qf5+ Kd6

Here we have a very unbalanced position. White has sacrificed 2 (!) pieces to drag the enemy King into the middle of the board.

The Database has 9 games with this position, with White scoring 56% (5 wins, 4 losses). It is useful to share some of these games and some related analysis.

9.Nb5+

About equal in strength to the text is Stockfish 7's suggestion 9.b4, i.e. 9...Bd4 10.Nb5+ Ke7 11.Nxd4 d6 12.Qf4 Nf6 13.O-O when White also recovers one of his sacrificed pieces.

Aggressive, but not enough is 9.d4, i.e. 9...Bxd4 10.Bf4 Bxc3+ 11.bxc3 Qf6 12.O-O-O+ Kc5 13.Rd5+ Kc6 14.Rxe5 Qxf5 15.exf5 d6 16.Re8 b6 17.Rd1 Bb7 18.Re4 Kd7 19.Re3 Nf6 20.Rg3 Rhg8 21.Rg6 Ne4 22.Re1 Rge8 23.Rxg7+ Kc6 24.c4 Nxf2 25.Rge7 Rxe7 26.Rxe7 Ba6 27.Bxh6 Bxc4 28.f6 Ng4 29.Bg7 Ne5 30.h3 Bxa2 31.g4 a5 32.g5 Ng6 33.Re2 Nf4 34.Rh2 a4 35.h4 Nh5 36.Kb2 Bd5 37.Rd2 a3+ 38.Ka1 a2 39.Rxd5 Kxd5 40.f7 Nxg7 41.g6 Ke6 42.h5 Nxh5 43.f8=Q Rxf8 44.Kxa2 Kf6 White resigned, swamishashi - wdiedrich, 8 0 blitz, lichess.com, 2015.

9...Kc6

Not 9...Ke7 10.Qxe5+ Kf8 11.Qxc5+ d6 12.Qxc7 Black resigned, morphyavatar - noobtwokey, FICS, 2013. 

10.Qxe5

Again 10.d4 is insufficient, if messy: 10...Kxb5 11.Qxe5 d6 (11... Qe7 12. a4+ Ka6 13.Qxc7 Qxe4+ 14. Be3 Qc6 15. Qxc6+ dxc6 16. dxc5 Nf6 17. O-O-O Nd5 18. c4 Nxe3 19. fxe3 Ka5 20. Kc2 Kb4 21. Ra1 Kxc4 22. Rhd1 Kxc5 23. a5 Bf5+ 24. Kc3 Rad8
25. Rxd8 Rxd8 26. Ra4 Rd3+ 27. Kc2 Ra3+ White resigned, coder3 - more, GameKnot.com, 2004) 12. Qd5 (12. Qxg7 Qf6 13. a4+ Kc6 14. d5+ Kb6 15. a5+ Ka6 16. Qg3 b5 17. axb6+ Kb7 18. bxc7 Kxc7 19. O-O Bd7 20. Be3 Ne7 21. Bxc5 Rhg8 22. Bxd6+ Qxd6 23. Qc3+ Kd8 24. f4 Qg6 25. g3 Qxe4 26. Qa5+ Ke8 27. Rae1 Qd4+ 28. Rf2 h5 29. Qa3 Rg7 30. d6 h4 31. Kg2 hxg3 32.
hxg3 Qd5+ 33. Kg1 Rh7 34. Rf3 Qd4+ 35. Rfe3 Black forfeited on time, MIG - Tshark, FICS, 2003) 12...Ne7 (allows mate) 13. a4+ Ka6 14. Qc4+ b5 15. Qxb5 checkmate, Manishsprasad - TimJonez, FICS, 2010. 

10...Qf6

Black avoids the tempting capture, 10...Kxb5: 11.a4+ Kb6 (better is 11...Ka6 12.Qxc5) 12.a5+ (12.d4 d6 13.dxc5+ dxc5 14.Qxg7 [14. a5+ Ka6 15.Qxc5 b6 16. axb6+ Kb7 17. bxa7 Qd6 18. Qb5+ Qb6 19. Qd5+ Qc6 20. Qb3+ Qb6 21.Qf7 Qb4+ 22. c3 Qxe4+ 23. Be3 Be6 24. Qxg7 Ne7 25. Qxe7 Rhe8 26. Qc5 Qxg2 27.Qb5+ Kc8 28. Qxe8+ Kb7 29. Qb5+ Kc8 30. Qa6+ Kd8 31. O-O-O+ Black resigned, MIG - jirikb, FICS, 2000] 14... Ne7 15. Be3 Rg8 16.Qxh6+ c6 17. a5+ Kc7 18. Bxc5 Rxg2 19. Qf4+ Kd7 20. Rd1+ Black resigned, avgur - rajpal, FICS, 2009) 12... Kb5 13. c4+ Kxc4 14. Qc3+ Kb5 15. Qd3+ Kc6 16. Qd5+ Kb5 17. Qd3+ Kc6 18. Qd5+ Kb5 19. d4 c6 20. Qxc5+ Ka6 21. b4 Nf6 22. b5+ cxb5 23. Qd6+ b6 24. axb6+ Kb7 25.bxa7 Rxa7 26. Rxa7+ Kxa7 27. O-O Qb6 28. Be3 Qxd6 29. e5 Qa3 30. d5+ Kb7 31.exf6 gxf6 32. d6 Qxd6 33. Ra1 Kc7 34. g3 b4 35. Bf4 Qxf4 36. gxf4 Bb7 37. Ra7 b3 38. Ra1 Be4 39. Kf1 b2 40. Ra7+ Kb6 41. Rxd7 b1=Q+ White resigned,  Sanrink - wojowhiskey, FICS, 2012.

A couple of alternatives that transpose into each other are: 10...d6 11.Nd4+ Bxd4 12.Qxd4 Nf6 and 10...Nf6 11.Nd4+ Bxd4 12.Qxd4 d6. 

11.Qd5+

Continuing to force the issue, but missing 11.Qxc7+!? Kxb5 12.a4+ Ka6 (other moves allow mate) 13.Qxc5 b6 14.Qa3 Qe7 15.Qd3+ Kb7 16.Qd5+ Kc7 17.d3 Bb7 18.Bf4+ d6 19.Qc4+ Kd7 when Black's King has escaped to relative safety, but it is likely that White's three extra pawns outweigh Black's extra piece.

This is a 10-minute game, and the advantages can go back and forth. 

11...Kxb5 12.O-O

Instead, Stockfish 7 suggests that with 12.a4+ Kb6 13.a5+ Ka6 14.Qxc5 Qc6 15.Qd4 Qxc2 16.d3 Ne7 17.O-O d6 18.Be3 Nc6 the game would be equal. Of course, that's easy for a computer to say. It looks like a big mess to me. 

12...Ne7 13.a4+ 

After Black's last, inaccurate move, White's attack gives him slightly better chances.

13...Kb6 14.Qb3+

Going after the King. Stronger was 14.a5+ Ka6 15.Qxc5, going after the piece. 

14...Kc6 15.Qb5+ Kd6

Black's King remains uneasy, but the defender pulls his position together.

16.c3 c6 17.Qd3+ Kc7 18.b4 Bxb4 19.Bb2 Ba5 

20.e5 Qxe5 21.Rae1 Qg5 22.Re3 Nd5 23.Rg3 Nf4 24.Qe4 Qf6 25.Rf3 g5 26.Kh1 d5 

27.Qe1 Qd6 28.Kg1 Bd7 29.Qa1 Rhe8 30.Ba3 Qe6 

White continues to fight, but with Black's improved development and time a factor, the Hunter has become the Hunted.

31.Re3 Qg4 32.g3 Rxe3 33.dxe3 Nh5 34.Bb4 Bb6 35.Qe1 Qf3 36.a5 Bh3 37.axb6+ axb6 38.Qd1 Qg2 checkmate

An exciting game in a very sharp variation!

Trampled!

Although I reached a decent position out of the opening in the following game, it felt like I was suddenly trampled by my opponent. Only later, after I was able to examine the game in more detail, did I see how I let various opportunities (some easy to see, some not) slip by - giving Black the signal to run me over.

perrypawnpusher - avgur
blitz, FICS, 2013

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 Kf7 11.f4 Rf8

Alternately, 11...Re8 was seen in perrypawnpusher - whitepandora, blitz, FICS, 2011 (1-0, 64).

12.f5 Ne5 13.d4 Neg4

The more sedate 13...Nc6 was probably better. Black's choice in the game allows White to even things up, or even get a small edge. It is hard for Black's Knights to avoid the temptation of harassing the White Queen, however.

14.Qb3+

An improvement over 14.Qf4 from perrypawnpusher - Jore, FICS, 2010 (1-0,32). 

14...d5 

15.e5

Stronger, according to Houdini, who advised me after the game, is 15.h3 Nh6 16.Bxh6 gxh6.

15...Ne4 16.h3

Already looking several moves ahead - but wrongly so.

In retrospect, Houdini preferred 16.Qh3 Nh6 17.Bxh6 gxh6 18.e6+ Kg8 19.Nc3 Nxc3 20.bxc3 Qg5 21.Rae1 

analysis diagram



when White's "Jerome pawns" are poised to create trouble (and might encourage Black to return a piece with ...Bxe6).

16...Ngf2 17.Rxf2

Too hurried. Instead, 17.Be3 seems to force 17...Nxh3+, when 18.gxh3 Ng3 19.Rf3 Nxf5 20.Nc3 Be6 would be an equal game.

Where did my move come from? Well, with Black's Rook on e8 instead of f8, the position is the same as in the above game, perrypawnpusher - whitepandora, blitz, FICS, 2011, where I won two Knights for my Rook. Humorously, when I posted that game on this blog, I rejected 17.Be3 because of 17...Nh1!?, when 18.Kxh1 Ng3+ would have led to the same two-pieces-for-one-Rook swap.

It turns out that things are not that "simple". After the current game Houdini suggested that White meet 17.Be3 Nh1 with 18.Nc3!? when 18...Nxc3 19.bxc3 Ng3 20.Rf3 Nxf5 21.g4 Kg8 22.Raf1 g6 (not 22...Nh6? 23.Qxd5+!) 23.gxf5 Rxf5 24.c4!? 

analysis diagram




gives White a chance for a small edge.

17...Nxf2 18.Kxf2 

I was, quite frankly, pleased to have remembered my earlier play in a similar position. It did not hit me for a few moves that I had gotten myself into trouble.

18...Bxf5

Obvious, but look at 18...Qh4+!? This allows Black to snipe the White d-pawn first, e.g. 19.Kf1 Qxd4 20.Nc3 Bxf5 21.Qxd5+ Qxd5 22.Nxd5 Bxc2 and White has nothing for the lost exchange except a weak e-pawn.

19.Kg1

I needed to try something like 19.Kg3!?

19...Kg8 

If, instead, 19...Qh4, it looks like I could hold things together with 20.Qxd5+ Be6 21.Qf3+ Kg8 22.Qe3 - but not after 22...Rf5!? followed by 23...Raf8.

20.Nd2 Qh4 21.Nf3 Qg3 

22.Kh1 

White needed to try 22.B/Nd2 - and pray. 

22...Bxh3 23.gxh3 Rxf3 24.Qxd5+ Kh8 25.Bf4 Rxf4 26.Qg2 Qxg2+ 27.Kxg2 Raf8 White resigned

Excellent break-through and wrap-up by my opponent.

The Search Continues... With Some Success

As part of my investigations looking into "A GM Plays the Jerome Gambit ??" I signed up for a free week's membership at the Internet Chess Club (ICC) and began searching the games database for Jerome Gambit games. Frankly, it was quite tedious, and often my effort seemed for naught, but I did come upon the following game. At least at the 2200 level, at least for this game, two pawns did not counterbalance an extra piece.

Rututu (2271) - AWayOut (2241)
blitz, 3 0 ICC, 2010

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

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6

7.Qd5+

Well, what do you know? He plays "the nudge"!

7...Ke8 8.Qxc5 Nf6

9.0-0 d6 10.Qe3 Kf7 11.f4 Re8 12.Nc3

Rybka 3 prefers a different line of play, which it says leaves White only a half-point behind (18 ply) but its recommendation is the kind of positional wood-shifting the computer gets into when it doesn't see anything specific and so tries a tweak here and a tweak there: 12.Qb3+ Kf8 13.d3 c6 14.a4 Qa5 15.Qa3 Qb6+ 16.Kh1 c5 17.a5 Qa6 18.f5 Ne5 19.Nc3 b5 20.b4 c4 21.Ne2 Bd7.

12...Kg8

Black has safeguarded his King by castling-by-hand.

13.f5 Ne5 14.Qg3

Possibly 14.d4, as in perrypawnpusher - avgur, blitz, FICS, 2010 (1-0, 23) and perrypawnpusher - CorH, blitz, FICS, 2011 (1-0, 24), was a bit better.

14...c5 15.d3 Bd7 16.Bg5 Bc6 17.Kh1 Qe7 18.Ne2 Qf7 19.Nf4 Nh5 20.Nxh5 Qxh5

Here Rybka 3 rates Black only about 2/3 pawn ahead, but it is clear that he is getting more mileage from his two pieces than White is getting from his piece and two pawns.

21.f6

Opening a line to the enemy King, but it does not achieve much here, even in blitz, as Black's deft reponse shows.

21...Re6 22.fxg7 Rg6 23.Rf8+ Rxf8 24.gxf8Q+ Kxf8

25.Qf4+

Imagining a Q + R battery on the f-file and plenty of pressure if Black's King moves to the Kingside.

25...Ke8 26.Bf6 Qg4

Offering an exchange of Queens to slow the tactics and preserve his advantage. Even stronger was 26...Ng4, keeping the Queens on the board, winning a pawn, and continuing his own pressure.

27.Qxg4 Nxg4 28.Bc3 d5

Wrapping things up.

29.Re1 dxe4 30.dxe4 Nf2+ 31.Kg1 Nh3+ 32.Kf1 Bb5+ White resigned

Pawns 1, Piece 0

Sometimes White wins by attack in the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) and sometimes he has to "play out" the game and use his pawns against his opponent's extra piece. Proper defense by Black should save at least half of the point, but that doesn't always happen...

perrypawnpusher - CorH

blitz, FICS, 2011

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

4...Kxf7 5.Nxe5+ Nxe5

Our earlier game, featuring 5...Kf8, was a pretty good example of Black and his extra piece out-duelling White and his extra pawns (although I had my chances)  perrypawnpusher - CorH, blitz, FICS, 2009, (0-1, 74).

6.Qh5+ Ng6 7.Qd5+

A check of The Database shows that I don't always play this "nudge": 7.Qxc5 d6 8.Qe3 Nf6 9.0-0 Re8, perrypawnpusher - MoonCat, blitz, FICS, 2007, (1-0, 29).


7...Ke8 8.Qxc5 d6 9.Qe3 Nf6 10.0-0 Kf7

Returning the extra tempo lost by the "nudge".

11.f4


Also seen: 11.Nc3 as in perrypawnpusher-joejox, blitz, FICS, 2009 (½-½, 27).

I did not find Rybka's apparent "let's not risk anything else" recommendation that it made after the game to be appealing: 11.d4 Re8 12.Qb3+ Kf8 13.f3 c6 14.c4 Qb6 15.Be3 Be6 16.Nc3 Bf7 17.Rfe1 

analysis diagram








11...Re8

Of course, Black's Knight can aways kick White's Queen instead, with 11...Ng4 as in perrypawnpusher - Feestt, blitz, FICS, 2009 (1-0, 19).

12.f5 Ne5


Instead, the precipitous 12...Rxe4 did not work at all after 13.fxg6+ hxg6 14.Qxe4 in perrypawnpusher - bnxr, blitz, FICS, 2011 (1-0, 29).


13.Nc3


I wanted to play 13.d4 but could not figure out how to meet 13...Neg4. The moves are from Vazquez -Carrington, Mexico, 2nd match, 1876 and I should have remembered them for historical reasons, if no others: 14.Qb3+ Kf8 15.h3 Rxe4 16.hxg4 Rxg4 17.Qf3 c6 18.Nc3 d5 19.Bf4 Kg8 20.Be5 h5 21.Rae1 Bd7 22.Re3 Qb6 23.b3 Rf8 24.Na4 Qb4 25.Nc5 Bc8 26.c3 Qb6 27.Bxf6 gxf6 28.Qh3 Rg5 29.Ne6 Bxe6 30.fxe6 Qc7 31.e7 Re8 32.Qe6+ Kh8 33.Qxf6+ Rg7 34.Qf8+ Black resigned

13...Kg8


Prudent. There was always the kick at the Queen with 13...Nc4 as an alternative, although it did not lead to much difference after 14.Qd4 Ne5 15.d3 Kg8 in perrypawnpusher - DysonLin, blitz, FICS, 2009 (1-0, 23).


14.d4 Neg4

Of course.

15.Qf3 Bd7


An opponent tried 15...c6 in perrypawnpusher - avgur, blitz, FICS, 2010 (1-0, 23) but the pawn probably needed to take two steps. 


16.h3 Nh6 17.Bxh6 gxh6 18.Rae1 Kh8

19.e5 dxe5 20.dxe5 Ng8

Active defense with 20...Bc6 (followed by 21...Rg8) was more likely to be successful in holding back the pawns, reaching  a balanced game.

21.f6 Bc6 22.Qf4 Rf8 23.f7

White's "Jerome pawn" threatens to win back the sacrificed piece: 23...Qg5 24.Qxg5 hxg5 25.fxg8/Q+ Kxg8. White would be a pawn better, but the win would be far off.

Instead, Black saves his Knight and loses his King.

23...Ne7 24.Qf6 checkmate

Pawn-ful Lessons

A pawn advance seems to sew up the game for White, but it turns out upon further inspection that not as many were needed, only the proper amount of support from the pieces...

perrypawnpusher  - nmuffjgp
blitz FICS, 2010

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

4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Ng6

This is one of the recognized refutations of the Jerome Gambit, but one reason I am pleased to face it is that White gets to eliminate Black's dark-squared Bishop which would otherwise hold up f2-f4.

7.Qd5+ Ke8 8.Qxc5 d6 9.Qe3 Be6

10.0-0 Nf6 11.f4

An interesting alternative: 11.d3 Qd7 12.b3 Kf7 13.Bb2 Rhf8 14.Nd2 Kg8 15.f4 Ng4 16.Qg3 Bf7 17.h3 Nf6 18.f5 Ne5 19.Bxe5 dxe5 20.Qxe5 Rfe8 21.Qg3 Rad8 22.Nf3 Qc6 23.Rf2 Qc5 24.Raf1 a5 25.a4 b5 26.axb5 Qxb5 27.Kh1 c5 28.Ne5 a4 29.bxa4 Qxa4 30.Nxf7 Kxf7 31.Qc7+ Rd7 32.Qxc5 Kg8 33.e5 Nd5 34.f6 gxf6 35.exf6 Qa8 36.f7+ Kh8 37.f8Q+ Black resigned, fehim - BoardStupid, FICS, 2009.

11...Ne7

Alternatives: 11...Bc4 12.d3 Bb5 13.c4 Bc6 14.f5 Ne5 15.Nc3 Qd7 16.b3 Qf7 17.d4 Neg4 18.Qe2 Qe7 19.Bg5 h6 20.Bxf6 Nxf6 21.Rae1 h5 22.e5 dxe5 23.dxe5 Ng4 24.h3 Nh6 25.Qf2 Kd7 26.Qd4+ Ke8 27.f6 Qe6 28.fxg7 Rg8 29.Rf6 Qd7 30.Qxd7+ Kxd7 31.e6+ Kd6 32.e7+ Kc5 33.Rxh6 Rxg7 34.Rxh5+ Kd4 35.Nb5+ Kd3 36.g4 Rag8 37.Rhe5 Rh7 38.e8Q Bxe8 39.Rxe8 Rgg7 40.Rd8+ Kc2 41.Re2+ Kc1 42.Na3 Rxh3 43.Rc2 checkmate, perrypawnpusher - avgur, blitz, FICS 2009;

11...Bf7 12.d4 Kf8 13.b3 h5 14.f5 Ng4 15.Qg3 Ne7 16.Bg5 Nf6 17.Nd2 Qd7 18.Rae1 Re8 19.c4 c5 20.d5 Ng4 21.Nf3 b5 22.h3 Nf6 23.Nh4 bxc4 24.bxc4 Qa4 25.Bxf6 gxf6 26.Ng6+ Bxg6 27.fxg6 Kg7 28.Qxd6 Rhf8 29.Qxc5 Qxa2 30.d6 Ng8 31.Ra1 Qe2 32.Rxa7+ Kxg6 33.Qf5+ Kh6 34.Rh7 checkmate, mrjoker - PhlebasP, ICC, 2009; and

11...Kd7 12.f5 Bxf5 13.exf5 Re8 14.Qg5 Ne7 15.Qxg7 c6 16.Qxf6 Black resigned, perrypawnpusher - dirceu, blitz, FICS, 2010.

12.d4

A dynamic alternative was 12.f5, as in 12...Bf7 13.d3 c6 14.h3 Qb6 15.g4 Qxe3+ 16.Bxe3 Kd7 17.Nd2 b6 18.Kg2 g6 19.g5 Nh5 20.f6 Nc8 21.d4 b5 22.b3 Nb6 23.Rac1 a5 24.c4 bxc4 25.Nxc4 Rhb8 26.Kf3 Nxc4 27.bxc4 Rb2 28.Rf2 Rab8 29.d5 c5 30.Rcc2 Rxc2 31.Rxc2 a4 32.Rc3 Kc7 33.Ra3 Be8 34.e5 dxe5 35.Bxc5 Rb2 36.Ke4 Re2+ 37.Be3 Bd7 38.f7 Black resigned, mrjoker - Melbourne, ICC, 2008.

12...d5 13.e5

Falling in with Black's plan. After the game Rybka suggested that White give up a Rook and a pawn for a couple of pieces: 13.f5 Bd7 14.e5 Nxf5 15.Rxf5 Ng4 16.Qf4 Bxf5 17.Qxf5 when Black has a small edge. 

13...Ne4

14.Nd2 Nxd2 15.Bxd2 Nc6

This move lets White's pawns run free. Instead, 15...Qd7 covers the f5 square.

16.f5 Bf7 17.e6 Bh5

18.h3

Preparing for the advance of more pawns. After the game Rybka showed that this was unnecessary. Instead, 18.Qh3 was strong, and after 18...Be2 White could afford 19.Rae1!? as 19...Bxf1 would be well met by 20.Qh5+.

Indeed, no further pawns need advance, if White's pieces are active.

18...Kf8

Better 18...Qf6 to answer 19.g4 with 19...Qxd4 although the Bishop is still lost after 20.gxh5.

19.g4

Here 19.f6 gxf6 20.Qh6+ Kg8 21.Qxh5 is stronger. 

19...Be8 20.g5

Again, this works, but stronger was 20.f6 gxf6 21.Qh6+

20...Ne7 21.f6

Here, 21.Bb4 would have tightened the screws before the pawn advance.

Black's resistance crumbles.

21...Ng6 22.e7+ Qxe7 Black resigned