Showing posts with label adamzzzz. Show all posts
Showing posts with label adamzzzz. Show all posts

Friday, March 31, 2017

Blackburne Shilling Jerome Gambit: Black Runs Out of Energy



In the following game Black is vigorous in his response to White's gambit. However, he seems to run out of energy at the end. Is being down 5 pawns for a piece reason enough to resign? In this case, perhaps not: Stockfish 8 evaluates the final position as even.

Wall, Bill - NN
lichess.org, 2016

 1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4


The Blackburne Shilling Gambit.

4. Bxf7+

The Blackburne Shilling Jerome Gambit.

4...Kxf7 5.Nxe5+ Ke8 6.Qh5+ g6 7.Nxg6 hxg6 8.Qxg6+


8.Qxh8 is a mistake, but I once managed to win with it anyhow, perrypawnpusher - tampajake, FICS, 2009 (1-0, 12).

8...Ke7 9.Qg5+ Nf6

Better than 9...Ke8 in perrypawnpusher - adamzzzz, FICS, 2009 (1-0, 39).

10.Qc5+

Better than 10.e5 in perrypawnpusher - JokeritT, FICS, 2010 (1-0, 28).

10...Kf7

I faced 10...d6 in a number of games; perrypawnpusher - foreverblackman, FICS, 2010 (1-0, 21); perrypawnpusher - vlas, FICS, 2010 (0-1, 23); perrypawnpusher - theferno, FICS, 2010 (1-0, 28); perrypawnpusher - Raankh, FICS, 2010 (1-0, 49); and perrypawnpusher - michon, FICS, 2015 (1-0, 36). Bill, too: Wall,B - Guest5170841, PlayChess.com 2015 (1-0, 15 ).

11.Qxd4 Qe8 12.Nc3 c5 13.Qe3 Qe5 14.h3 Bh6 15.Qf3 Qf4 16.Qe2 d6

Black is fighting back vigorously, despite his slightly exposed King. Still, I am always suspicious of ...c5 in these kinds of positions, as it can allow further opening of the game.

17.d4 Qh4 18.Bxh6 Qxh6 19.dxc5 dxc5 20.e5 Nh5 


Here Stockfish 8 recommends 21.g4!? which is not the kind of move that I can see Bill choosing, as it seems to give even more exposure to his King. Yet the followup is ironic enough for him to appreciate: 21...Nf4 22.Qf3 Kg7 23.0-0-0 (made possible by the Knight's block of the Queen's diagonal) Ne2+ 24.Kb1 Nxc3 25.Qxc3 Be6 with an advantage to White after he captures the c-pawn.

21.Qc4+ Be6 22.Qxc5 Black resigned


Interesting. Compared to Stockfish 8's analysis above, the Knights are still on the board, which would slightly favor White's better piece. However, White's King is not castled, which could be quite risky. 22...Rhd8 would seem to guard well against White's possible Queen check at c7.

In a human vs human game, however, in the long run I would take the extra pawns over the extra piece. It would appear that Black agreed. 

Tuesday, July 7, 2015

A Discussion Continued


After this game was finished, I checked with The Database, and discovered that my opponent and I had "discussed" this opening (over the board) several times previously.

In addition, before I post a game on this blog, I usually "discuss" it with either Houdini 3 or Stockfish 6, hoping for enlightenment.


This time, however, my two electronic "friends" did not always agree in the early stages, occasionally sounding like a couple of know-it-all kibitzers, leaving a current assessment of the opening lines a bit unsettled.


Ironically, the game was tipped by the endgame play of both me and my opponent - as HAL 9000 once said, "It can only be attributable to human error."


perrypawnpusher - michon

blitz, FICS, 2015

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4 4.Bxf7+ 




The Blackburne Shilling Jerome Gambit.


4...Kxf7 


My opponent declined the piece a couple of times, a couple of years ago, with 4...Ke7, but without success: perrypawnpusher - michon, blitz, FICS, 2013 (1-0, 8) and perrypawnpusher - michon, blitz, FICS, 2013 (1-0, 41). 


5.Nxe5+ Ke8 


Instead, 5...Ke6 was seen in perrypawnpusher - michon, blitz, FICS, 2014 (1-0, 23); while 5...Ke7 was seen in perrypawnpusher - michon, blitz, FICS, 2013 (1-0,18). 


6.Qh5+


This move was preferred by Houdini 3 after some deep thought.


Some human input: In over 70% of the over-2,100 relevant Blackburne Shilling Jerome Gambit games in The Database, White chose 6.Qh5+, scoring 60%.


Instead, Stockfish 6 preferred 6.c3.


Again: In 21% of the relevant Blackburne Shilling Jerome Gambit games in The Database, 6.c3, was the people's choice, scoring 55%.


I checked, and noticed that 6.c3 was first mentioned on this blog in "Blackburne Shilling Jerome Gambit", 7 years ago.


Interestingly, an earlier version of Stockfish expressed a preference for 6.c3 about 5 years ago.


The choice of 6.Qa5+ or 6.c3 still seens to be an "Unfinished Discussion" (posted 3 years ago), although it seems that 6.c3 may have appeared in more blog posts than 6.Qh5+.


Here are a couple of examples of the 6.c3 Nc6 7.Nxc6 dxc6 8.d4 Qh4 line suggested by Stockfish 6: 9.0-0 (9.g3 Qxe4+ 10.Qe2 Qxe2+ 11.Kxe2 Bg4+ 12.f3 Bf5 13.Re1 Bxb1 14.Kf1+ Be7 15.Rxb1 Kd7 16.Re2 Re8 17.Be3 Nf6 18.c4 Rhf8 19.b4 Ng4 20.Kg2 Nxe3+ 21.Rxe3 Bxb4 22.Rxe8 Rxe8 23.Rxb4 Re2+ 24.Kh3 Rxa2 25.Rxb7 Ra4 26.Kg4 Rxc4 27.Rxa7 Rxd4+ 28.f4 c5 29.Ra8 c4 30.Rh8 c3 31.Rxh7 c2 32.Rxg7+ Kc6 33.Rg6+ Rd6 34.f5 c1Q 35.Rxd6+ cxd6 36.f6 Qc4+ 37.Kf5 Qf1+ 38.Ke6 Qh3+ 39.Ke7 Qd7+ 40.Kf8 d5 41.f7 d4 42.Kg8 Qg4+ 43.Kh8 Qh5+ 44.Kg8 Qg6+ 45.Kf8 d3 46.Ke7 Qxf7+ 47.Kxf7 d2 48.h4 d1Q 49.h5 Qxh5+ White resigned, marinrouge - homerg, FICS, 2002) 9...Ke7 10.Nd2 Nh6 11.Nf3 Qh5 12.Qd3 Kd8 13.Bg5+ Be7 14.Bxh6 gxh6 15.Ne5 Bd6 16.Qg3 Be6 17.f4 Bxe5 18.fxe5 Rg8 19.Qf3 Bg4 20.Qf7 Qxf7 21.Rxf7 Kc8 22.Kh1 b6 23.Raf1 Kb7 24.Rxh7 h5 25.Rff7 Rac8 26.d5 cxd5 27.exd5 Be2 28.d6 Rgf8 29.Rxc7+ Rxc7 30.Rxc7+ Ka6 31.h3 h4 32.Kh2 Bb5 33.Rg7 Bc6 34.e6 b5 35.d7 Rf6 36.Re7 Bd5 37.d8Q Rg6 38.Qc8+ Ka5 39.Qc7+ Ka4 40.Rg7 Rxg7 41.Qxg7 a5 42.Qd4+ b4 43.cxb4 Black lost on time, dzomba - VendettaA, lightning [!], FICS, 2006. 


6...g6 7.Nxg6 


7...hxg6 


Here we have another dispute.


Stockfish 6 prefers 7...Nxc2+, suggesting that after 8.Kd1 hxg6 (8...Nxa1? 9.Nxh8+ Ke7 10.Qe5#) 9.Qxg6+ Ke7 10.Qg5+ (Houdini prefers 10.Kxc2 with an edge for White) 10...Ke8 11.Qg6+ Ke7 12.Qg5+ White draws by repeating the position (Houdini prefers 12.Kxc2 with an edge for White).


8.Qxg6+


A number of years ago I got away with the weaker 8.Qxh8?! after 8...Nh6 when 8...Nxc2+, instead, would have led to an edge (Houdini) or an advantage (Stockfish 6) for Black after 9.Kd1 Nxa1 10.Qxg8 in perrypawnpusher - tampajake, blitz, FICS 2009 (1-0, 12).


8...Ke7 9.Qg5+ Nf6


Here Stockfish 6 says Black has the advantage, while Houdini 3 says the position is equal.


Both prefer the text to 9...Ke8  of perrypawnpusher - adamzzzz, blitz, FICS, 2009 (1-0, 39). 


10.Qc5+


Better than 10.e5 of perrypawnpusher - JokeritT, blitz, FICS, 2010 (1-0, 28).


10...d6


Stockfish 6 slightly prefers 10...Ke8 to the text, while Houdini 3 thinks 10...d6 is better. 


11.Qxd4 Be6 


Here, Houdini 3 likes White, while Stockfish 6 prefers Black.


Of course.


For the record, I have also seen:


11...c5 in perrypawnpusher - foreverblackman, blitz, FICS, 2010 (1-0, 21) and perrypawnpusher - vlas, blitz, FICS, 2010 (0-1, 23);


11...Qd7 in perrypawnpusher - theferno, blitz, FICS, 2010 (1-0, 28);


and 11...Bg7 in perrypawnpusher - Raankh, blitz, FICS, 2010 (1-0, 49). 


12.Nc3


Also possible is 12.f4 c5 when again Houdini 3  likes White, while Stockfish 6 likes Black.


12...Bh6 13.d3 Bxc1 14.Rxc1


Both Stockfish 6 and Houdini 3 suggest 13...c5 first, to displace the White Queen.  


White has four pawns for his sacrificed piece. Even if the position is "objectively" even, his prospects are good at club play level.


The next few moves show that both players are blind to some tactical possibilities, however.


14...Qg8 15.g3 Bh3 16.Nd5+?! Nxd5 17.Qxd5? Qxd5 18.exd5 Rae8 


Both players overlook the fork 18...Bg2! when Black can grab a pawn and increase Kingside pressure after 19.Rg1 Rxh2 20.c4 Rf8.


19.Kd2 Kd7 20.c4 Re7 21.f4 Rhe8 22.Rce1 Rxe1 23.Rxe1 Rxe1 24.Kxe1


Both computer programs see the position as equal.


What follows goes along with suggestion that a bad plan is better than no plan at all - which is a nice way of saying that my bad idea worked, while my opponent missed some good ideas.


24...Bg4 25.Kf2 Ke7 26.Kg2?! Kf6?! 




Black is worried about stopping the Kingside pawns, when he probably should look at using his Bishop to capture a couple of center pawns: 26...Be2 27.d4 Bxc4 28.a3 Bxd5+ 29.Kf2 b6. After this, Black can look to create his own passed pawn, which should counter White's activity.


27.h3 Bd7?!


Again, 27...Be2 was to be preferred. Black's Bishop has to cut down the number of enemy pawns before they become a real problem. 


28.g4 Bxg4


This is tantamount to resignation. White can now develop play on both wings. At least one passer is bound to get through.


29.hxg4 


29...a6 30.Kf3 c5 31.dxc6 bxc6 32.Ke4 Kg6 33.d4 a5 34.b3 Kf6 35.a3 Kg6 36.b4 


Black resigned


Saturday, December 4, 2010

Incomplete


The following game allows me to point out that my assessment of a line in the Blackburne Shilling Jerome Gambit has been incomplete. Quick! Let me add a bit more.

COMTIBoy - erickking
blitz, FICS, 2010

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


The Blackburne Shilling Gambit.

4.Bxf7+

The Blackburne Shilling Jerome Gambit.

4...Kxf7 5.Nxe5+ Ke8


As I've written before

Seen most often is 5...Ke8, and after 6.Qh5+ g6 7.Nxg6, best play for both sides is 7...hxg6 8.Qxg6+ Ke7 9.Qg5+, when Black can go for the draw-by-repetition with 9...Ke8; or go for an unbalanced (but largely equal) position as acirce suggested above with 9...Nf6 10.Qc5+ d6 11.Qxd4 when White has four pawns for a piece and it is unclear if Black has an open King or open lines for development.
This doesn't address the question, though, What if White wants more than a draw?

6.Qh5+ g6 7.Nxg6 hxg6 8.Qxg6+ Ke7 9.Qg5+ Ke8 10.Qe5+


Instead of repeating checks White decides to pick up the Knight at d4, going on his own for an "unbalanced (but largely equal) position."

10...Ne6

This move tilts the game in White's favor.

Stronger was10...Qe7, daring White to take the Rook: 11.Qxh8 Qxe4+ White resigned, avoiding checkmate, in jatapia - RVLY, FICS, 2008.

After the more sensible 11.Qxd4, Black has played 11...Rh6, GOH - Jorma, FICS, 2005 (1-0, 43); 11...Rh4, keeswillem - focus13, GameKnot, 2006 (0-1, 29); 11...Nf6, dic - zoranb, FICS, 2009 (0-1, 25); and 11...Bg7, GOH - boggus, FICS, 2005 (1-0, 28) and  perrypawnpusher - adamzzzz, blitz, FICS, 2009 (1-0, 39).

11.Qxh8

White has a Rook and four pawns for two pieces, and a safer King.

11...Qg5

This is an obvious improvement over the knee-jerk 11...Qf6  of Dragon Tail - Blitzcraig, FICS, 2008: 12.Qh5+ (12.Qxg8 was okay, too) Kd8 13.d3 Nd4 14.Bg5 Nxc2+ 15.Kd1 d6 16.Bxf6+ Nxf6 17.Qf7 Nxa1 18.Qxf8+ Kd7 19.Qxf6 Kc6 20.Na3 Black resigned, DragonTail - Blitzcraig, FICS, 2008.

12.0-0 Nf6

Stronger was the more direct 12...Nf4, when Black out-played his opponent: 13.g3 d6 14.d4 Ne2+ 15.Kh1 Nxc1 16.Nc3 Bg4 17.Raxc1 Bf3+ 18.Kg1 Kd7 19.Qh4 Qxh4 20.gxh4 Bh6 21.Rce1 Bd2 22.Rb1 Nf6 23.e5 Rg8 checkmate, Raju - risbo, FICS, 2002.

13.d4 Qg6 14.Nc3 d6 15.f4 Nxe4


A slip that costs a piece and the game.

16.f5 Qg7 17.Qh5+ Ke7 18.Nxe4 Qxd4+ 19.Nf2 Nd8 20.Re1+ Kd7 21.Qe8 checkmate

Saturday, February 6, 2010

Pawn Wave

Whether it is in the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+), the Semi-Italian Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 4.various Bc5 5.Bxf7+), or the Blackburne Shilling Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nc4 4.Bxf7+), the pawns that White receives for his sacrificed piece(s) are very important. Sometimes these "Jerome pawns" advance like a wall and make mischief. Sometimes they advance like a wave.

perrypawnpusher - theferno
blitz FICS, 2010

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


4.Bxf7+ Kxf7 5.Nxe5+ Ke8


Wow – didn't I just play this?

6.Qh5+ g6 7.Nxg6 hxg6 8.Qxg6+


I'm sure glad that I read this blog, where this line was recently analyzed.

The New Year's Database has 61 games with this line, with White scoring 61%. (Remember the caution about statistics: Your mileage may vary.)

8... Ke7 9.Qg5+ Nf6


This move is stronger than 9...Ke8, which should have led to a draw after 10.Qg6+ etc. Instead, perrypawnpusher - adamzzzz, blitz FICS, 2009 continued: 10.Qe5+ Qe7 11.Qxd4 Bg7 12.Qc4 Kd8 13.Nc3 Nf6 14.0-0 c6 15.d4 d5 16.exd5 Nxd5 17.Nxd5 cxd5 18.Qxd5+ Qd7 19.Bg5+ Kc7 20.Qc5+ Qc6 21.Qxc6+ bxc6 22.c3 Rb8 23.b3 Rh5 24.Bf4+ Kb7 25.Bxb8 Kxb8 26.Rae1 Ba6 27.Re8+ Kc7 28.Rfe1 Bh6 29.R8e5 Rxe5 30.Rxe5 Bd2 31.c4 Bc3 32.Re4 Bb7 33.d5 cxd5 34.cxd5 Bxd5 35.Re7+ Kb6 36.h4 Bf6 37.Rd7 Be6 38.Rd6+ Kc7 39.Rxe6 Black resigned

10.Qc5+ d6 11.Qxd4


Fritz8 gives a slight edge to Black here, but I am sure that any Jerome Gambit Gemeinde member would be happy with the four pawns that White has in exchange for his sacrificed Bishop.

11...Qd7

I am not sure of Black's idea, here. Perhaps he initially thought of following this up with ...Qd7-g4 – a good idea against my next move (12.f3 was more to the point). Otherwise, 11...Bg7 was a good alternative.

12.Nc3 Bg7

Again, 12...Qg4 was a reasonable choice.

13.Nd5+

After the game Rybka preferred: 13.h3 b5 14.d3 c5 15.Qe3 Bb7 16.Ne2 Kd8 with and edge to White. Must be the pawns.





analysis diagram






13...Nxd5

This capture is a mistake. Better, according to Rybka, was 13...Kf7 14.Ne3 Qc6 15.d3 Ng4 16.Qd5+ Qxd5 17.Nxd5 Nxh2 18.Ke2 c6 19.Ne3 Be6 20.f4 Rag8 21.Bd2 Ke7 22.Bc3 Bxc3 23.bxc3 when Black's pieces put good pressure on White's pawns, for an advantage.






analysis diagram





14.Qxg7+ Ke6 15.Qxh8 Nb4


White is up the exchange – plus those great Kingside pawns – so the next move is not hard to understand.

16.Qh3+ Ke7 17.Qxd7+ Bxd7 18.Kd1 Rf8


Black has a temporary advantage in development, but once White is safe, the pawns can roll.

19.f3 Kd8 20.d3 d5


21.Bg5+ Kc8 22.e5 Rf5 23.f4 d4 24.g4 Rf8 25.f5


25...Nd5 26.e6 Bc6 27.Re1 Rg8 28.h4

Black resigned

Monday, February 1, 2010

Shillings: One Found, Two Lost (Part 2)

Applying the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) treatment to the Blackburne Shilling Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nd4) has become a standard plan when my favorite opening meets someone's favorite defense. So far I have scored 13 wins against 2 losses and 1 draw, so I'm not likely to change my play any time soon.

perrypawnpusher - xenoglot
blitz 2 12, FICS, 2010

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



4.Bxf7+


4...Kxf7 5.Nxe5+ Ke8


Checking the New Year's Database (which I have been updating regularly) I note that the Blackburne Shilling Jerome Gambit has scored 56% (based on 2,292 games),  but that the per centage jumps to 61% (based on 1,076 games) in the 5...Ke6 line. (All cautions about statistics, of course, apply.) 

6.Qh5+ g6 7.Nxg6 Nf6


A good look at this line can be found in "Please, don't do that..." and "It's a good thing I read this blog".

Rybka says that developing the King's Knight gives White a small advantage, and instead recommends: 7...hxg6 8.Qxg6+ Ke7 9.Qg5+ Nf6 (for 9...Ke8 see perrypawnpusher - adamzzzz, blitz FICS, 2009)10.Qc5+ Kf7 11.Qxd4 d5 when Black has an edge.

8.Qe5+ Ne6



At this point in one game, my opponent resigned: perrypawnpusher - fintrade, blitz FICS, 2009.


9.Nxh8 Bg7 10.d4


10...c6 11.Bg5 Bxh8


Black has two pieces for a Rook and three pawns – but these are "Jerome pawns"!

12.Bxf6

After the game Rybka preferred straight development with 12.Nc3. I think that is because it did not see going into an endgame as strong as staying in the middle game.

12...Bxf6

Better, according to the computer, was 12...Qxf6 13.Qxf6 Bxf6
when White has only an edge. I would have been happy to follow that line, though.

13.Qh5+

On revient toujours à ses premières amours...

13...Ke7 14.Qxh7+ Ke8 15.e5 Be7


With three connected passed pawns and a Rook for Black's two Bishops, White is better – but how to convert the advantage?

16.Qh5+ Kf8 17.Qf5+ Ke8 18.Qg6+ Kf8 19.Qf5+ Kg7


I was checking the King and even repeating the position in order to pick up some time to think a bit deeper. My opponent apparently took this as indecision or confusion on my part. This kind of thought process can lead to over-confidence, which is not good. 

Xenoglot should have returned his King to e8 and seen if I really wanted a draw – which would have been a favorable outcome for him at this point.

20.0-0 Nxd4

See what I mean? Over-confidence can allow one to fall into the shallowest of traps.

21.Qg4+ Kf8 22.Qxd4 Ke8


From here, Black's position slowly disintegrates.

23.Nc3 d6 24.exd6 Bxd6 25.Rfe1+ Kd7 26.Rad1


Even stronger was 26.Qg7+.

26...Qf8 27.Ne4 c5 28.Qxd6+ Qxd6 29.Nxd6 


29...Kc6 30.Nxc8 Rxc8 31.h4 b5



32.h5 a5 33.Re6+ Kb7 34.Rd7+ Ka8 35.Ree7 Rc6 36.Re8+ Rc8 37.Rxc8 checkmate


My opponent immediately challenged me to a rematch...