chessgames.com
Members · Prefs · Laboratory · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing

Jaan Yukhanovich Ehlvest vs Hikaru Nakamura
US Championship (2009), St. Louis, MO USA, rd 2, May-09
English Opening: Agincourt Defense. Catalan Defense (A14)  ·  1/2-1/2

ANALYSIS [x]

FEN COPIED

explore this opening
find similar games 3 more Ehlvest/Nakamura games
PGN: download | view | print Help: general | java-troubleshooting

TIP: Games that have been used in game collections will have a section at the bottom which shows collections which include it. For more information, see "What are Game Collections?" on our Help Page.

PGN Viewer:  What is this?
For help with this chess viewer, please see the Olga Chess Viewer Quickstart Guide.
PREMIUM MEMBERS CAN REQUEST COMPUTER ANALYSIS [more info]

A COMPUTER ANNOTATED SCORE OF THIS GAME IS AVAILABLE.  [CLICK HERE]

Kibitzer's Corner
May-10-09  DB Cooper: 2 pieces and an isolated pawn for the queen actually works well in blitz.
May-10-09  Kinghunt: 13... Qxg2? Queen for two minor pieces gives white a huge advantage. Ehlvest just failed to convert it and blundered away the win with moves like 19. Rc4. Naka was lucky to escape with a draw.
May-10-09  miseiler: I suspect the idea was purely psychological. Naka had barely used any time on the clock through move 25, while Ehlvest used all of his. He seemed to be playing for a draw all along, or to hope his opponent blundered in time trouble.

Also, Rybka gave white about one and a half pawn's worth of advantage after the sac, depth 20.

May-10-09  Lutwidge: I think the sac was pretty well motivated, actually, and that Black had reasonable if not fantastic compensation for the queen. Reminds me very slightly of:

Karpov vs Kasparov, 1990

And even a little bit of:

Spassky vs Bronstein, 1956

Admittedly, Black is +0 =2 -1 in the above games, but Bronstein's sac is probably not the reason for his loss to Spassky, so, er, well, there.

Also, it's sort of depressing to find these very interesting ideas whittled down to what Rybka thinks. Rybka is told, like all of us, that Q > B+N+P, so it's hardly surprising that it would prefer White in this game. I think it's more interesting that the "pawn-plus" eval doesn't seem to increase over more and more ply, suggesting that White's advantage might be more or less symbolic.

May-11-09
Premium Chessgames Member
  shalgo: I have a brief discussion of this game in the latest post at my blog: http://shalgochess.blogspot.com/
May-18-09
Premium Chessgames Member
  holdem33: "no guts, NO GLORY!"
May-18-09  nevski: Despite the other well-founded comments, I agree with Kinghunt, DB Cooper and miseiler. Ehlvest lost excellent opportunity to win !
Dec-06-13  solskytz: a 1.5 point advantage doesn't have to increase over many ply, in order to be convincing and decisive in a majority of cases.

Sometimes it's just symbolic as you say... however I felt that white should have been able to convert this position. Of course familiarity plays a big part in a practical game - so that this wasn't really contested on equal ground. Nakamura prepared a surprise...

So maybe Q = N+B+surprise value in some cases...

Dec-06-13  solskytz: I thought that white played Rc4, as he preferred to lose the exchange but keep the pawn center.

He thought (maybe) that having pawns on c4 and d4 minus the exchange, would be better to lose a pawn and the center.

It turned out that he lost pawn, center AND the exchange. After that, even if he's still winning, it's really hard to see how.

Dec-06-13  solskytz: I suppose, that in playing 19. Rc4, white expected to be able to push d5 eventually.

My guess is that 22...Bf6!, pinning the d4 to the undefended bishop AND adding a fourth attacker to it (black IS playing with more pieces, we grant him that), came as a surprise to GM Ehlvest. It was this important miscalculation that cost him the win.

Sometimes you need to take risks in order to convert an advantage. The risk is exactly that you have omitted a key move from your calculations.

This can be see as an appendix to the discussion, of whether a 2900 player can convert a knight's advantage from the starting position against perfect play, over 50% of the time.

Dec-06-13  solskytz: I thought that 26. f4 was an interesting try, instead of 26. g4.

The idea is to play 27. Bb2 and force a knight trade, where black's ...e5 won't give him a dangerous passed and advanced d-pawn.

Even if black avoids the trade, the B is well placed on b2. There are ideas of Q entries into b7 and b8 or a8 - maybe there is still some play left there for white after all.

This said, even after a trade, the R+B can still put up a good fight against the Q, with such an open white king. Maybe it's already drawn at this point.

NOTE: You need to pick a username and password to post a reply. Getting your account takes less than a minute, is totally anonymous, and 100% free—plus, it entitles you to features otherwise unavailable. Pick your username now and join the chessgames community!
If you already have an account, you should login now.
Please observe our posting guidelines:
  1. No obscene, racist, sexist, profane, raunchy, or disgusting language.
  2. No spamming, advertising, duplicate or nonsense posts.
  3. No malicious personal attacks, including cyber stalking, systematic antagonism, or gratuitous name-calling of any member Iincludinfgall Admin and Owners or any of their family, friends, associates, or business interests. If you think someone is an idiot, then provide evidence that their reasoning is invalid and/or idiotic, instead of just calling them an idiot. It's a subtle but important distinction, even in political discussions.
  4. Nothing in violation of United States law.
  5. No malicious posting of or linking to personal, private, and/or negative information (aka "doxing" or "doxxing") about any member, (including all Admin and Owners) or any of their family, friends, associates, or business interests. This includes all media: text, images, video, audio, or otherwise. Such actions will result in severe sanctions for any violators.
  6. NO TROLLING. Admin and Owners know it when they see it, and sanctions for any trolls will be significant.
  7. Any off-topic posts which distract from the primary topic of discussion are subject to removal.
  8. The use of "sock puppet" accounts to circumvent disciplinary action taken by Moderators is expressly prohibited.
  9. The use of "sock puppet" accounts in an attempt to undermine any side of a debate—or to create a false impression of consensus or support—is prohibited.
  10. All decisions with respect to deleting posts, and any subsequent discipline, are final, and occur at the sole discretion of the Moderators, Admin, and Owners.
  11. Please try to maintain a semblance of civility at all times.
Blow the Whistle See something that violates our rules? Blow the whistle and inform a Moderator.

NOTE: Keep all discussion on the topic of this page. This forum is for this specific game and nothing else. If you want to discuss chess in general, or this site, visit the Kibitzer's Café.

Messages posted by Chessgames members do not necessarily represent the views of Chessgames.com, its employees, or sponsors. All Moderator actions taken are at the sole discretion of the Admin and Owners—who will strive to act fairly and consistently at all times.

This game is type: CLASSICAL. Please report incorrect or missing information by submitting a correction slip to help us improve the quality of our content.

Featured in the Following Game Collections[what is this?]
English, Agincourt Def. Catalan Def (A14) 1/2-Q sac counterplay
from yDble Fio mostly White, Reti/Zukertort & GB Game by fredthebear
English, Agincourt Def. Catalan Def (A14) 1/2-Q sac counterplay
from Strategic Planning Helped Fredthebear Get Away by fredthebear
English, Agincourt Def. Catalan Def (A14) 1/2-Q sac counterplay
from Black Double Fianchettos In Process by Jersey Joe
The Dutch Defense (and Anglo-dutch)
by Jersey Joe
The Dutch Defense (and Anglo-dutch)
by Zhbugnoimt
White fights off black sacrificial attack
from My favorite games by behzadmaha


home | about | login | logout | F.A.Q. | your profile | preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | new kibitzing | chessforums | Tournament Index | Player Directory | Notable Games | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | privacy notice | contact us


Copyright 2001-2019, Chessgames Services LLC