Sunday, July 11, 2010

More Than Seen At First Glance (Part 1)

The following Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) game starts quietly. Black's defense is a "refutation" only in the sense that my opponent (rated a few points above me) was content with a draw, so I had to struggle if I wanted more.

Fortunately I found something to complicate things and eventually give me the full point.

perrypawnpusher - obmanovichhh
blitz, FICS, 2010

1.e4 e5 2.Nf3 Nf6 3.Bc4 Bc5 4.Nc3 Nc6


The Italian Four Knights Game.

5.Bxf7+


The Italian Four Knights Jerome Gambit.

5...Kxf7 6.Nxe5+ Nxe5 7.d4 Bb4

An unusual but certainly playable defense. Including this game, the updated New Year's Database has 26 examples of this position, with White scoring 65%.

Stronger for Black, though, was 7...Bd6 8.0-0 Nc6 9.f4 Be7.

8.dxe5 Bxc3+ 9.bxc3


If Black keeps his wits about him, he can now play 9...Re8, giving back the piece but reaching a safe, even position where he has play against White's weakened pawns: 10.exf6 Rxe4+ 11.Be3 Qxf6

9...Nxe4 10.Qd5+ Kf8 11.Qxe4 d6


White is a pawn up – a situation that is always psychologically uneasy for me, as I feel like I've "escaped" in another Jerome Gambit, and I tend to play vapid moves that lead to even (or worse) positions. (Brian Wall may have a valid insight into this.)

12.0-0 dxe5



I am convinced that my opponent was already thinking about reaching a drawn endgame here. I was willing to go along with him, and hoped to out-play him – a notion that obmanovichhh would probably have scoffed at.

The fact is that we both missed 13.Ba3+ here, when the position becomes anything-but-drawish: 13...Kf7 14.f4 (to open more lines for attack) Be6 15.fxe5+ Kg8 and White wins Black's Queen with 16.Rf8+ Qxf8 17.Bxf8 Rxf8.




analysis diagram







White's Queen can now go munching on Black's pawns.

13.Qxe5 Qe7 14.Bf4


Again, too accomodating of Black's plan – I thought that I knew what I was doing – when there was a stronger option available.

After the game Stockfish showed that White could have shaken things up with the piece sacrifice 14.Ba3!? as after 14...Qxa3 15.Rfe1 Bd7 16.Qxc7 Bc6 17.Rad1 he would have had a very strong position, with the possible continuation 17...h6 18.Rd8+ Rxd8 19.Qxd8+ Kf7 20.Qxh8 when White is up the exchange. 

14...Qxe5 15.Bxe5 c6


For the next 15 or so moves, White and Black play cooperative chess: we both aim for a Bishops-of-opposite-colors endgame that I think that I can win, and that my opponent thinks that he can draw.

There is another factor in play, however – we'll get to that later.

16.Rad1 Bf5 17.Rd2 Kf7 18.Rfd1 Rhe8 19.f4 Re6 20.Rd8 Rxd8 21.Rxd8 Re7 22.Rd2 g5 23.g3 gxf4 24.gxf4 Be6


Each side will put pawns on squares the same color as their Bishop, the Kings and Rooks will help in the blockade of the enemy pawns, and all will be peaceful in the world...

25.a3 Bc4 26.Kf2 b5 27.Ke3 a5 28.Rd6 Bd5 29.Rh6 Kg8 30.Kd4 a4 31.Kc5 Be4


Black has reached the position that he has been aiming at for a long time. So have I.

32.Rxc6

Surprise!

Truth be told, after this sacrifice the game is still drawn – but it is tough work for Black, made tougher by the blitz time control.

32...Bxc6 33.Kxc6 Re6+


Instead, according to Rybka and Stockfish, if Black centralizes his King to blockade White's passed f-pawn, and maneuvers his Rook to pin the Black King to the a-file in front of the passed a-pawn, then it doesn't matter if he loses all but one of his pawns: 33...Kf7 34.Kxb5 Rb7+ 35.Kxa4 Ke6.




analysis diagram








White will not be able to make progress.

34.Kxb5 Rh6


This also leads to a draw, but not an easily seen one.

35.c4 Kf7 36.c5

 

Now if Black can scoop up the two lagging pawns with 36...Rxh2 37.c6 Rxc2 and keep his Rook on the c-file to capture the White pawn when it Queens, he actually would have winning chances after 38.c7? Ke6 39. Kb5 h5! as White cannot stop the Black h-pawn.





analysis diagram







Instead of 38.c7?, White has to find 38.f5! when his Bishop will be free to stop the Black h-pawn and his f-pawn does not allow Black's King to wander too far from the center.

A reasonable continuation might look like 38...Rc1 (keeping an eye on the passer) 39.Bd6 (threatening to block the Rook's access to White's c-pawn, and possibly able to block checks along the b-file) Ke8 40.f6 Rf1 (Black's King and Rook are working well together in frantic times) 41.Be7 (safeguarding the f-pawn) h5 (to the rescue!) 42.Kb6 Rb1+ 43.Bb4 Rf1 44.Kb7 Rc1 45.c7 Kd7 46.Ba5 Ke6 (Black abandons his Rook in favor of capturing White's f-pawn) 47.c8/Q+ Rxc8 48.Kxc8 Kxf6




analysis diagram








– and suddenly, miracle of miracles, Black realizes that it no longer matters if he loses his last two pawns, as the game will enter the notorious "Rook pawn plus wrong Bishop" endgame, which is a draw. (Of course, if Black greedily tries to win the Bishop for his h-pawn, White will queen his a-pawn and win.)

I didn't realize that the endgame was that complicated, but I did think it would "set problems" for my opponent.

36...Ke6


37.c6 Ke7

Black can no longer count on 37...Rxh2, as White has 38.c4!? to help guard his advanced (and advancing) c-pawn.

Black can try the swindle 38...Rh3!? hoping for a King move by White, but 39.f5! wins for the first player, as in 39...Ke7 40.f6+ when one of the passers will Queen, for example: 40...Kd8 41.Kc5 Rd3 42.Bd6 Rf3 43.Be7+ Kc8 44.Kd6 Rf1 45.Ke6 Re1+ 46.Kf7 Kc7 47.Ke8 Kxc6 48.f7 Rf1 49.f8/Q+ Rxf8 50.Bxf8 and White's extra pawn makes all the difference in the world compared to the above analysis.






analysis diagram






38.Kb6


My turn to slip: this activates 38...Rxh2 as a drawing strategy, much as in the analysis after White's 37th move (for one thing, c2-c4 doesn't work as a shield as White's King is too far advanced) – ending up as before with a Rook Pawn plus wrong Bishop endgame for White.

White's winning move was therefore 38.h4!? which cannot be answered by 38...Rxh4?! because of 39.Bf6+! Kxf6 40.c7 and the pawn will Queen. Black defends better with 38...Kd8, but White can slowly advance his forces and win, e.g. 39.Kc5 Rh5 40.c4 Kc8 41.Kd5 Kd8 42.Ke4!? Rh6 43.f5 and either 43...Rxc6 or 43...Rxh4+ will be answered by 44.Kd5 and the Bishop pawns will continue to advance...

38...Kd8

Missing his last chance (38...Rxh2).

39.Kb7


At this point my opponent disconnected and was forfeited. He has to give up his Rook for the advanced c-pawn, and the ending thereafter would not be difficult for me to win.

Saturday, July 10, 2010

Upcoming ChessWorld Jerome Gambit Thematic Tournament!?

Word is that Jerome Gambit Gemeinde member Pete Banks ("blackburne") may be organizing another ChessWorld Jerome Gambit Thematic Tournament!

There has been plenty of coverage of previous tournaments on this blog – see "Jerome Gambit Tournaments," "Rail2Rail Nails It," "Overrated!" "Carlos Azcarate Wins Tourney," "Sole Survivor" and "Prized Players" for a taste – and if this new tournament should take off, it will be closely watched here as well.

Stay tuned for details, or check things out at the ChessWorld site.

Friday, July 9, 2010

Let the Guilt-a-thon Continue

I was already feeling bad about the Jerome Gambit (see "Mixed Feelings" and " 'The Worst Chess Opening Ever' Warning or Menace??") when I played the following game.

perrypawnpusher - Anon
blitz 4 10, FICS, 2010

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


4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8


7.Qxe5 Black resigned


Uh...okay.

Well, I know that I was facing a lower-rated player, giving "Jerome Gambit odds," but still... Not that much lower. Too much "shock and awe"?

Chin up, good opponent. There are 260 games with this position in the updated New Year's Database. White scored only 48% in them. (I admit, 17 of those games are mine, and I scored 85%.)

Besides, Rybka rates Black almost a pawn and a quarter better at this point.

I'm not really a scary guy. The Jerome Gambit is really refuted.

Ask my nemesis, MRBarupal.

Thursday, July 8, 2010

Mixed Feelings

I sometimes have mixed feelings about sharing the Jerome Gambit and related openings. Are they something that new or young or unpracticed players should be learning?

Then I remember that some coaches teach their players the Blackburne Shilling Gambit, and it would be a shame not to be able to meet that Jerome-ishly...

Olivera,T  - Khapizov,Z
U-10, World Youth Chess Championship 2009

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4


The Blackburne Shilling Gambit. There are many ways to answer this last move – 4.Nxd4, 4.d3, 4.0-0, 4.c3, 4.d3 even 4.a3 – as long as you stay away from the hoped-for 4.Nxe5?!.

4.Bxf7+


Then, of course, there is the Blackburne Shilling Jerome Gambit.

This is seen as "a courageous sacrifice" at Xadrez ms.

4...Kxf7 5.Nxe5+ Ke8 6.Qh5+


I have been experimenting with Stockfish as an analysis engine, and it suggested here 6.c3 first (an ideas once suggested by Tim McGrew), and after 6...Ne6 then 7.Qh5+. This bears further exploration.

6...g6 7.Qd1


If White is going to make the sacrifice at f7, then he has to follow through here with 7.Nxg6.

The Queen retreat leaves the first player without the initiative, which is part of the usual compensation for the sacrificed piece.

7...Qe7 8.Nc4 Qxe4+ 9.Ne3 d5 10.0-0 Bd6 11.Re1 Ne7 12.Nc3 Qf4 13.Nf1 Rf8 14.f3 Bc5


White is under serious pressure. He bravely continues to defend.

15.Ne3 Bd6 16.Nf1 Bc5 17.Ne3

Yes, at this point young Olivera would be happy with a draw (by repetition).

17...Qh4 18.Ncxd5 Nxc2 


Leading to complications for both sides – and eventually a chance for White.

19.Nxc7+ Kd8 20.Re2 Nxa1 21.Nxa8 Qc4 22.Kh1 Qxa2 23.d4 Bd6 24.Ng4 Bxg4 25.fxg4 Kd7


26.b4 Qb3 27.Qe1 Rxa8 28.Bg5


White is down two pieces, but with this move he conjures up an escape swindle.

28...Kc7 

It is not clear what Black feared here, as 28...Re8, 28...Nc6, 28...Nd5, 28...Qxb4 and 28...Nc2 (among others) were all good. Perhaps time was a factor?

29.Rxe7+ Bxe7

Leading to a forced draw. Black could have tried 29...Kb6 (other moves are disastrous), but 30.Re6 would have led to either 30...Kc7 31.Re7+ and a draw as in the game, or to 30...Qd5 31.Qe5 Qxe5 32.dxe5 when White has an edge.

30.Qxe7+ Kc6 31.Qc5+ Kd7 32.Qe7+ Kc6 33.Qc5+ Kd7 34.Qe7+ Draw


Wednesday, July 7, 2010

Pawnful

Today's game is a routine Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+): White plays solidly, Black plays second-best moves, White accepts the full point.

perrypawnpusher - caterwaul
blitz FICS, 2010

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


4...Kxf7 5.Nxe5+ Nxe5 6.Qh5+ Kf8

The updated New Year's Database has 250 games with this position. White scores 46%.


7.Qxe5 d6 8.Qg3
 


I've only reached this position a couple of times, but there are over 70 games with it in the New Year's Database. White scores 53%.

8...Nf6

An alternate defense was seen in perrypawnpusher - frencheng, blitz FICS, 2010: 8...Qe7 9.d3 d5 10.0-0 dxe4 11.Re1 Qd6 12.Bf4 Qd4 13.Be5 Qd7 14.Rxe4 Qf5 15.Qxg7+ Ke8 16.Bg3+ Qxe4 17.dxe4 Black resigned.

9.d3

Or 9.Nc3 Ng4 10.0-0 g6 11.d3 Kg7 12.h3 Ne5 13.Kh1 Rf8 14.f4 Kh8 15.Bd2 Nc6 16.Nd5 Be6 17.Ne3 Rg8 18.c3 d5 19.d4 Be7 20.e5 Bh4 21.Qf3 Qf8 22.g3 Be7 23.g4 Qf7 24.f5 gxf5 25.gxf5 Bc8 26.f6 Bf8 27.Nf5 Bxf5 28.Qxf5 Re8 29.Rae1 Nd8 30.Kh2 Ne6 31.Rg1 Rxg1 32.Rxg1 a5 33.Qg4 White won on time, perrypawnpusher - klixar, blitz FICS, 2007.

9...h6


10.Nc3 c6 11.0-0 Be6 12.Be3 Qd7


There was nothing wrong with 12...Bxe3; in fact, it was probably better than the text.

13.f4 Bxe3+ 14.Qxe3 Qe7


The game is about even. Black's King is still not castled (by-hand) and White's "Jerome pawns" are ready to roll.

15.e5 Nd5 16.Qe4 


An odd choice. After the game Rybka suggested: 16.Nxd5 Bxd5 17.c4 Bg8 18.Rae1 Bh7 19.d4 Bf5 20.Qf3 Rd8 21.g4 which seems to work out better.
 






analysis diagram





16...Nxc3 17.bxc3 Qf7 18.f5 Bd5 19.Qf4


19...Ke7

Making room for the Rooks, apparently, but 19...dxe5 20.Qxe5 Re8 showcased Black's advantage. Instead, Black's Bishop gets caught by the pawns.

20.c4 Be6

The desperado move 20...Bxg2 was better, although White would still have the advantage.

21.exd6+ Kd7 22.fxe6+ Qxe6

23.c5

Much stronger was 23.Qg3, as Black has no good way to protect the pawn at g7, and when White's captures it with check he has the dual threats of winning one of Black's Rooks if the King goes to the back rank, or pinning Black's Queen to his King with a Rook if the King advances.

I played the text move with the Rooks and pawns endgame in mind.

23...Rae8 24.Qf7+ Qxf7 25.Rxf7+ Ke6 26.Rxb7

White's advantage is clear. I admit that my next moves appear wasteful, as I allow my two advanced pawns to be captured; but my plan was to gobble up Black's pawns in return, and create more passers for myself.

26...Kd5 27.Rxa7 Kxc5 28.Rxg7 Kxd6 29.Rg6+ Kc5 30.a4 Re2 31.a5 Rxc2 32.a6

32...Kb6 33.Rg4 Ra8 34.Rb4+ Kc7 35.Rb7+ Kc8 36.Rh7 Kb8



37.Rxh6

I was not doing a lot of analysis here, but I didn't think that I needed to.

37...c5 38.Rb1+ Ka7 39.Rb7 checkmate