Showing posts with label oritelgavi. Show all posts
Showing posts with label oritelgavi. Show all posts

Wednesday, January 2, 2019

Jerome Gambit: Another Game, More Lessons

I enjoyed my recent online Jerome Gambit game, and even though the computer had plenty to say about my play, afterward, I enjoyed that, too.

perrypawnpusher - atomsymbol
10 0 blitz, FICS, 2018

1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.Bxf7+ 




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



This is a solid move, but I am always glad to see it, because it seems to have a "do it yourself" feel. It is as if Black has reasoned "nobody would seriously sacrifice two pieces in the opening, so it seems reasonable, if not downright scientific, and, maybe, even necessary, to give one back, right away". Thank you.

7.Qd5+ Ke8 8.Qxc5 N8e7



The knight usually goes to f6, but the text is something that Jerome Gambit regulars such as AsceticKing, Bill Wall, chessmusings, MrBlack, MrJoker, shugart, vlastous and I have faced before, so it is worth being ready for. The Knight provides some protection for the King along the e-file, and leaves the f-file open for Black's Rook.

9.O-O d6 10.Qe3 Rf8 11.f4 Qd7



Komodo 9.02, in blunder check mode, does not object to this move, but it seems to block Black's Bishop, which blocks Black's Rook - a classic weakness in the Jerome.

On the other hand, it provides some restraint on White playing e4-e5, once his Queen has been enticed to the d-file, since the exchange of Queens would dampen any kind of attack. Perhaps Black should have tried 11...Nc6, as in perrypawnpusher - taman, blitz, FICS, 2010 (1-30).

12.f5 Ne5 13.d4 Nc4 14.Qd3 



Done almost as a reflex, and providing support for the pawn at f5, should I play e4-e5, but I probably should have looked at and evaluated 14.Qe2. (14...d5 would have been a good response to any of my choices.)  Interestingly, last year shugart chose 14.Qb3 in his game against oritelgavi (0-1, 36).

14...b5 15.b3 Nb6 16.Bg5 a6 17.Nc3 h6 18.Bxe7 Kxe7 19.Rae1 Kd8

Komodo now sees White as having equalized, meaning that it gives the first player some positional plusses in its evaluation to balance out the 2 pawns vs piece material disadvantage. Black lags in development (but he will quickly fix this) and his King is riskily placed.

20.Nd5

Komodo's preference shows how chess computers have improved in their positional play: my move allows opening the e-file, but the computer prefers to see the Knight posted on e6, and suggests, even at the cost of time: 20.Ne2 Bb7 21.Nf4 Rg8 22.Ne6+ Kc8 It then anchors the Knight with 23.d5, with an even game. I need to learn to see the quieter moves.

20...Nxd5 21.exd5 Bb7 22.c4 Re8



Contesting the e-file. It is enlightening to see that Komodo prefers that Black castle-by-hand on the Queenside. The whole line of recommended play - well beyond my during-the-game investigations - ends up with a very unbalanced position which it assesses as better for Black, although White clearly has practical chances: 22...Kc8 23.Qe3 Qf7 24.Qe7 Kb8 25.Qh4 Re8 26.Re6 Bc8 27.Rxe8 Qxe8 28.f6 gxf6 29.Qxh6 Bb7 30.Qxf6 Qe3+ 31.Qf2 Qc3 32.Qf3 Qxd4+ 33.Qf2 Qd3 34.Rc1 Bc8 35.h3 Kb7 36.Kh2 Bd7 37.cxb5 axb5 38.Qc2 Qxc2 39.Rxc2






analysis diagram




I might not be able to hold this position with White, but a good number of stronger Jerome Gambiteers probably could.

23.Re6 Rxe6

This Rook exchange gives up too much. It is fascinating to see what Komodo believes is a better line of play, with Black forcing a draw: 23...Rg8 24.Rfe1 Kc8 25.Re7 Qd8 26.Qg3 Kb8 27.Rxg7 Rxg7 28.Qxg7 bxc4 29.bxc4 Qh4 30.g3 Qh5 31.f6 Ka7 32.f7 Qf3 33.g4 Rf8 34.Re7 h5 35.Rxc7 hxg4 36.Qxf8 Qd1+ 37.Kf2 Qf3+ 38.Ke1 Qe3+ 39.Kd1 and White cannot escape the checks, leading to a draw. Nice, but this was all beyond my assessments.




analysis diagram





24.fxe6 Qe7

White's control of the f-file, his Rook invasion point at f7, the possible invasion by the Queen at h7 (I missed that in the game) and Black's weak back rank all support the assessment that White is winning.

25.Rf7 

Even stronger was 25.Qh7 with back rank mate threats, as well as plans to pin Black's Queen with a Rook. Giving up a piece gives temporary respite 25...Bxd5 26.cxd5 Kc8 27.Qc2 The new weakness is the 7th rank and the c-pawn 27...Kb7 (27...c5 28.dxc6 Qxe6 29.Qd2 Qe8 30.Re1 Qd8 31.Re6 Ra7 32.Qe1 Qg5 33.d5 or 27...Qe8 28.Qc6 Qxc6 29.Rf8+ Kb7 30.dxc6+ Kxc6 31.Rxa8) 28.Qc6+ Ka7 29.Rf7 Re8 30.Rxe7 Rxe7 31.Qd7 Rxd7 32.exd7 Kb7 33.d8=Q  It will soon be "curtains" for Black.

25...Qe8 26.Qf3 

This move is fine, but 26.Qf5 was more precise. Why? Because, after the text my opponent could have surprised me with 26...Qxe6, and, while the move wouldn't have saved the game (27.dxe6 Bxf3 28.gxf3 Ra7 29.d5!?) any kind of suprise can be a weapon in blitz.

26...bxc4 

This leads to a quick end.

27.Rf8 Bxd5 28.Rxe8+ Kxe8 29.Qf7+ Kd8 30.Qd7  checkmate



Monday, October 19, 2015

A Tale of Two Knights


Image result for free clipart knights

The following game has a Knight sortie for Black, and one for White. One is effective, one is not. The "Jerome pawns" join in the fun for White.

Wall, Bill -Guest293396
PlayChess.com, 2015

1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.O-O Bc5 5.Bxf7+ 



We have seen this position recently in another of Bill Wall's games, vs Mydrik.

5....Kxf7 6.Nxe5+ Nxe5 7.d4 Bd6 8.dxe5 Bxe5 9.f4 Bd4+ 


Possibly a slip on Black's part, although the move has been seen before, so perhaps he was looking for a simple way to return the sacrificed piece. Still, 9...Bd6 10.e5 Bc5+ looked like a better choice, leading to an even game. 

10.Qxd4 Re8

Others:

10...d6 11.e5 dxe5 12.Qxd8 Rxd8 13.fxe5 Bg4 14.exf6 gxf6 15.Nc3 Rd7 16.Ne4 f5 17.Bg5 Kg6 18.Nc5 Rd5 19.Ne6 Re8 20.Nxc7 Black resigned, Fietsenzo - oritelgavi, FICS, 2014;

10...c6 11.e5 Nd5 12.c4 Qb6 13.c5 Qb4 14.Qf2 Rf8 15.Bd2 Qxb2 16.Bc3 Qxf2+ 17.Rxf2 b6 18.Bd4 Kg8 19.Nc3 Nxc3 20.Bxc3 bxc5 21.Rb2 Rxf4 22.Rf1 Rxf1+ 23.Kxf1 Ba6+ 24.Kf2 Rf8+ 25.Ke3 Bb5 26.Ba5 Rf5 27.Bc7 Rf7 28.Rd2 h6 29.h4 Re7 30.Bd6 Re8 31.Ke4 c4 32.Bc5 a6 33.Rxd7 c3 34.Rd1 c2 35.Rc1 Ba4 36.Kf5 Rd8 37.Be3 Rd1 38.Ke6 Rd3 39.Bf4 Bb5 40.Rxc2 Rd4 41.g3 Bd3 42.Rd2 Bc4+ 43.Kf5 Rxd2 44.Bxd2 Bxa2 45.Bb4 Kf7 46.g4 Be6+ 47.Kf4 Bd5 48.g5 hxg5+ 49.hxg5 Ke6 50.g6 Bc4 51.Bd6 a5 52.Ke4 a4 53.Kd4 Bb5 54.Kc3 Be2 55.Kb4 Bh5 56.Kxa4 Bxg6 57.Kb4 Bf5 58.Kc5 Be4 White forfeited on time, ndrwgn - lobisonte, FICS, 2013;

10...Qe7 11.e5 Nh5 12.f5 Re8 13.Qd5+ Kf8 14.Bf4 Nxf4 15.Rxf4 Qxe5 16.Qxe5 Rxe5 17.f6 gxf6 18.Rxf6+ Kg7 19.Rf1 b6 20.Nc3 Ba6 21.Rfd1 Rae8 22.Rxd7+ Kg8 23.Rxc7 Rf8 24.h3 Ref5 25.Kh2 Rf2 26.Ne4 Rxc2 27.b4 Rxc7 28.a4 Rc4 29.b5 Rxe4 30.bxa6 Rf2 31.Rc1 Rxa4 32.Rc8+ Kg7 33.Rc7+ Rf7 34.Rb7 Rxa6 35.Rb8 Ra2 36.Re8 b5 37.Re3 b4 38.Rb3 a5 39.h4 Ra3 40.Rb2 b3 41.h5 a4 42.h6+ Kg6 43.g4 Ra2 White resigned, HauntedKnight - JustaHobby, FICS, 2010

11.e5 Ng4

This "attack" is brushed off, but the retreat 11...Ng8 also has its difficulties, e.g. 12.Qd5+ Kf8 13.Nc3 d6 14.Qe4 Qh4 15.g3 Qh5 16.Qb4 c5 17.Qe4 h6 18.Nb5 Qf7 19.Nxd6 Qe6 20.Nxe8 Kxe8 21.f5 Qe7 22.Be3 Rb8 23.Rae1 b6 24.Bf4 Bb7 25.Qa4+ Kf8 26.f6 Qe6 27.fxg7+ Kxg7 28.Qxa7 Qd5 29.Qxb7+ Rxb7 30.e6 Qxa2 31.Be5+ Kg6White forfeited on time, frizerkaHR - cebop, FICS, 2013

12.h3 Nh6 13.f5 

The "Jerome pawns" are in their glory.

13...Ng8 14.Nc3 c6 15.Ne4 Qb6 16.Ng5+ 


This Knight will win material, and usher in the pawns.

16...Kf8 17.Nxh7+ Ke7 18.f6+ gxf6 19.exf6+ Nxf6 20.Qxb6 axb6 21.Nxf6 Black resigned


White is up a piece and a pawn, as well as having the safer King.