Showing posts with label Pawnshop. Show all posts
Showing posts with label Pawnshop. Show all posts

Thursday, August 6, 2015

We Know What We're Doing (Sort Of)




I chuckled when I was putting together the earlier blog post, "Opening Discussion, Not Quite Closed". The idea that there were several very good moves to be played in an opening position, and I chose none of them -- and won the game, anyhow -- seemed very appropriate in a Jerome Gambit blog.

Anyone who has browsed through the 51,000+ games in The Database has come away with an appreciation of the fact that Jerome Gambiteers frequently play second (or third, or fourth, or fifth...) best moves successfully. Some of that is due to their creativity, or their familiarity with the strategies of the opening. Some of that is due to the time control (blitz) or level of play (club chess).

Finally, some of White's success is due to the strangeness of the Jerome Gambit itself, which forces defenders to continually figure things out - or perish. I am reminded of the following anecdote from the "Blackmar Diemer Gambit World", #43, January, 1991, told by IM Gerard Welling, and reprinted in "Tom's BDG Pages"
At the Hastings Chess Congress in 1937 Emil Josef Diemer created a stir in a game with an English gentleman. Diemer had a bad position, but after a move by his opponent he replied quickly, then jumped up, and to the chagrin of his opponent exclaimed: "Precisely the blunder that I have been expecting!" 
White in the following encounter has 15 games in The Database. Perhaps that is not enough, yet, to allow too much straying from the "straight and narrow". He has interesting chances to win or draw, but eventually succumbs in a madcap ending to the ticking clock.

bemillsy - Dpouchy

blitz, FICS, 2012

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




4...Kxf7 5.Nxe5+ Ke6 6.Nxc6 dxc6




6...bxc6, as in fehim - Pawnshop, FICS, 2009 (0-1, 48) could have been punished by 7.Qg4+!?


7.Qg4+


Possibly the best move. I mention that, because of the following games, where White varied:


7.d4 Be7 8.Qg4+ Kf7 9.Qh5+ Kf8 10.O-O Nf6 11.Qe2 Be6 12.e5 Nd5 13.c4 Nb4 14.a3 Na6 15.Nc3 Qxd4 16.Rd1 Qxc4 17.Qf3+ Kg8 18.Be3 Bg4 19.Qg3 Bxd1 20.Bh6 Qg4 21.Rxd1 Qxg3 22.hxg3 gxh6 23.Rd7 Kf7 24.f4 Rad8 25.Rxd8 Rxd8 26.Kh2 Rd2 27.b4 Rd3 28.Nb1 Rb3 29.Nd2 Rxa3 White resigned, blackburne - DREWBEAR 63, ChessWorld JG6, 2011. White has 155 games in The Database.


7.d3 Qf6 8. O-O Ne7 9. c3 Rd8 10.d4 Bb6 11. Nd2 Kf7 12. Qb3+ Kf8 13. Nf3 c5 14. e5 Qc6 15. Bg5 Re8 16. Bxe7+ Rxe7 17. d5 Qd7 18. c4 Qg4 19. h3 Qg6 20. e6 c6 21. Rad1 cxd5 22. cxd5 Bc7 23.Rfe1 b6 24. d6 Bxd6 25. Rxd6 Bb7 26. Rd7 Bc8 27. Rd8+ Re8 28. e7  checkmate, UNPREDICTABLE - jrauch, FICS, 2010. White has 450 games in The Database.


7.O-O Nf6 8.d3 Qd4 9.c3 Qd7 10.d4 Be7 11.e5 Ne8 12.f4 Rf8 13.Qh5 Kd5 14.c4+ Kxc4 15.Na3+ Kd5 16.Qxh7 Qg4 17.Be3 Bf5 18.Qh3 Qe2 19.Qg3 Be4 20.Rfe1 Qxb2 21.Bf2 Nf6 22.Qb3+ Qxb3 23.axb3 Ng4 24.Nc4 Rxf4 25.Rf1 Bb4 26.Rad1 Raf8 27.Be3 Rxf1+ 28.Rxf1 Rxf1+ 29.Kxf1 Nxh2+ 30.Kg1 Ng4 31.g3 Nxe3 32.Nxe3+ Kxd4 33.Kf2 Be1+ 34.Ke2 Bxg3 35.e6 Kc3 36.e7 Bg6 37.Nf5 Be5 38.Nh4 Bd3+ 39.Ke3 g6 40.e8=Q Bd4+ 41.Kf4 Black resigned, perrypawnpusher - johnde, blitz, FICS, 2010. White has 548 games in The Database. 


7...Kf7


Possibly the weakest of his choices. Better defense was found after 7...Kf6 8.Qh4+ g5 9.Qg3.


8.Qf3+


Instead, 8.Qh5+ wins back a piece by forking the King and Bishop. 


8... Nf6 9. c3 Re8 10. d4 Bb6




Cooperative. The alternative, 10... Rxe4+, looks stronger.


White battles on, eventually dropping the exchange, which puts him a Rook down - but he does not lose hope.


11.Bg5 Kg8 12.Bxf6 gxf6 13.O-O c5 14.Qg3+ Kh8 15.d5 Rxe4 16.Nd2 Rg4 17.Qf3 c4 18.Ne4 f5 19.Ng3 f4 20.Ne2 Qg8 21.Nxf4 Rg5 22.Rfd1 Bg4 23.Qe4 Bxd1 24.Rxd1 Re8 25.Qxc4 c6 26.g3 Bc7 27.Ne6 cxd5 28.Qxc7 Rxe6 29.Qxb7 a5 30.Kg2 h5 31.Rxd5 h4 32.Rd7 Rh6 33.Qe4 




A glance shows Black attacking fiercely - with his extra Rook.


33...hxg3


Where is E. J. Diemer when you need him? Is this precisely the blunder that bemillsy had been expecting?? Now White has a draw.


34.Qd4+! Rg7 35.hxg3 Rhg6




And again??


Black needed to mildly accept a draw by repetition with 35...Kh7 36.Qe4+ Kh8 37.Qd4 Kh7 30.Qe4+ etc. Now White is better.


36.c4


Homer - I mean, bemillsy - nods. He is right, his advancing pawn will be important, but after he plays 36.Rd8 to win Black's Queen for a Rook. Q + 5Ps will then out-play 2Rs + P.


36...Kh7


Black takes his opportunity to avoid the above killing fork, but should have done so with a Queen move like 36...Qe6 or 36...Qa8+, when he would be better again.


Now White again has a plucky draw by repetition: 37.Qh4+ Rh6 38.Qe4+ Kh8 39.Qd4 etc.


37.Rxg7+


Making things difficult again, if Black correctly recaptures with the Queen. White would have plenty of checks to deliver to the enemy King, but eventually the extra Rook would prevail over the extra pawns.


37...Rxg7 38.Qh4+ Kg6 39.f4




White does not accept the 39.Qe4+ line, drawing, and looks for a mate that is not there. (This does have the feel of a blitz game as time runs down.)


39...Kf7 40.Qh5+ Kf8 41.Qf5+ Rf7 42.Qc8+ Kg7 43.Qxg8+ Kxg8


White puts his trust in what must still be considered his "Jerome pawns".


44.Kf3 Rd7 45.Ke3 Kf7 46.g4 Kf6 47.b3 Ke6 48.a3 Re7 49.b4 a4 50.b5 Kd6+ 51.Kd4 


The pawns look scary, especially with a ticking clock, but "objectively" the Rook still has time to pick them off, one-by-one.


51...Kc7


Suddenly, Black's chances have crashed according to Stockfish 6, and the best he can hope for is now 52.g5 Rd7+ 53.Ke4 Re7+ 54.Kd4 Rd7+ and a draw by repetition. Instead of re-positioning his King, it looks like he needed to get his Rook into a pawn-flanking position.


52.c5


On the other hand, advancing the pawns on the wing where there is an in-place stopper will not bring victory. I do not think there is anything left for White now.


52...Rd7+ 53.Ke5 Rd3 


54.g5 Rxa3 55.f5 Re3+ 56.Kd5 a3 57.f6 a2 58.f7 Rf3 White forfeited on time




Thursday, January 21, 2010

A Strange, But Intriguing, Path (Part 1)

If I face the Jerome Gambit (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+) any time soon (not likely; see "I expected better...") I'd like to try out a relatively new, but strange and intriguing opening idea...

theprof - Brown
FICS, 2005

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



4...Kxf7 5.Nxe5+ Ke6



What an odd move! Yet, there are 10 examples in the New Year's Database, and White only scored 30% in those games. As I've noted, this bears examination.

6.Nxc6 dxc6


My first thought: If 6.Nxc6 is the recommended response to the venerable 5...Kf8 – see "Critical Line: 5...Kf8 (1), (2),(3), and (Revisited)" – it should be the first thing to try when the Black King is even further afield.

Oddly, Rybka sees Black with his King on e6 as only 1/10th of a pawn or so worse than when the King is on f8. Overall, it sees Black as still being not quite a pawn better than White.

By the way, after 6.Nxc6, 6...dxc6 is the proper way to capture, not 6...bxc6, as the former prevents White from playing d2-d4 and opens up the c8-h3 diagonal for Black's light-squared Bishop, giving some protection to the King.

I have only one example of  the wrong capture, a back-and-forth game where Black finally won on time: 6...bxc6 7.0-0 [7.Qg4+ is the winning move: White will be able to either check the King and then win the Bishop; or capture on g7 with check and then win the Rook] Nf6 8.d4 Bb6 9.Nc3 Ba6 10.Re1 Kf7 11.Bg5 h6 12.Bh4 g5 13.Bg3 Qe8 14.Qf3 Kg7 15.e5 Nd5 16.Nxd5 cxd5 17.Qxd5 Qe6 18.Qe4 Raf8 19.c3 Rf5 20.a4 c6 21.b4 Bc4 22.a5 Bc7 23.Qe3 a6 24.f4 Rhf8 25.fxg5 Rxg5 26.Bh4 Rg6 27.Bf6+ Kh7 28.Rf1 d6 29.Rf3 dxe5 30.dxe5 Bd5 31.Rg3 Rfg8 32.Rf1 Rxg3 33.hxg3 Bxe5 34.Bxe5 Rg6 35.Qf4 Bc4 36.Rf2 Rg8 37.Qf7+ Qxf7 38.Rxf7+ Bxf7 39.Bd4 Bd5 40.Kf2 Rf8+ 41.Ke3 Rf1 42.Ke2 Rc1 43.Kd2 Rf1 44.Ke2 Rf5 45.Ke3 Kg6 46.Kd3 Rg5 47.g4 Rxg4 48.Ke3 Rxg2 White forfeited on time, fehim - Pawnshop, FICS, 2009

7.Qg4+




White's best.

7...Ke7

Critical was 7...Kf6, when White should loosen Black's Kingside with 8.Qh5+ g5 9.Qg3 followed by d2-d3 and possibly h2-h4 or f2-f4, when Black will still have an edge.

The text is an error which White immediately exploits.

8.Qxg7+ Kd6 9.Qxh8 Ne7 10.Qxh7 (better was 10.Qxd8+) Be6 11.d3 Qd7 12.Be3 (12.Bf4 checkmate) Rf8 13.Bxc5+ (13.e5+ Kxe5 14.Qg7+ Rf6 15.Qg3+ Rf4 16.Qxf4+ Kd5 17.Nc3 checkmate) Kxc5 14.Nc3 Kb6 15.f3 a6 16.Qh4 Ka7 17.Qf2+ Kb8 18.0-0-0 Ng6 19.Kb1 Nf4 20.g3 Ng6 21.f4 Ne7 22.h3 Bg8 23.g4 Nc8 24.f5 Qf7 25.b3 Nb6 26.Kb2 a5 27.Ra1 a4 28.Nxa4 Nxa4+ 29.bxa4 b6 30.Qd4 Kb7 31.Qc4 Qxc4 32.dxc4 Bxc4 33.Rad1 Re8 34.Rde1 Ka6 35.e5 Ka5 36.e6 Kxa4 37.f6 Bxe6 38.Re3 Kb5 39.Rhe1 Kc5 40.Rxe6 Rf8 41.g5 Kb5 42.R1e5+ c5 43.Re7 Ka6 44.Rxc7 Kb5 45.Ree7 Rd8 46.Rcd7 Rb8


The game was drawn here because both players had run out of time. However, White has had a significant advantage for quite a while.