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Levon Aronian vs Fabiano Caruana
Sinquefield Cup (2015), Saint Louis, MO USA, rd 1, Aug-23
Queen's Gambit Declined: Harrwitz Attack. Two Knights Defense Blockade Line (D37)  ·  1-0

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Sep-18-16  Patriot: 26.Qh5

26...Nxc2 27.Nxg5 Nxe1 28.Qxh7+ Kf6 (28...Kf8 29.Qf7#) 29.Ne4#

26...Nxc2 27.Nxg5 Rh8 28.Rf1 Qe8 29.Rf7+ Kg8 30.d6 Rc5 31.Ba2 Rc1+ 32.Kf2

26...Nxc2 27.Nxg5 Bg4 28.Qxh7+ Kf6 (28...Kf8 29.Qf7#) 29.Ne4#

26...Bg4 27.Qxg4 Nxc2 28.Nxg5 Ne3 29.Nd6+ Kh6 30.Qh3+ Kg6 31.Nxd8 (30.Qg3+ may be better)

Sep-18-16  Patriot: <agb2002> <C.1) 28... Ne3 29.Ne6+ Kh6 (else 30.Qg7#) 30.Qg7+ Kh5 31.Be2+ Kh4 32.Qg4#.> I assume you meant 32.Qg3# since 32.Qg4+ Nxg4. I like your line better than mine although mine wins also, but finding that it wins is all that is important. My <29.Nd6+> should've said 29.Ne6+.

I don't care for the <B) 26...h6 27.Rf2> branch because it let's white off the hook without a fight (i.e. it doesn't seem critical). This might be good if another candidate (besides 26.Qh5) was also strong and more direct.

But again, you do great work!

Sep-18-16
Premium Chessgames Member
  agb2002: According to Stockfish, 30.d6 loses all the advantage after 30... Ne3.

I saw both 29.Ne6+ and 29.Rxf5 but rejected them because I had the impression that White started lacking toys to play.

Sep-18-16
Premium Chessgames Member
  drollere: actually, this one seemed pretty easy. the Q move was more or less forced, and the N move logical after it.

after Nxe5 threatening mate in few, each of black's defensive moves opened explicit targets; the pawn push was available from the beginning, and the open f file made the R maneuvers easy to find. the bishop play at the end was clever.

personally, this week i found the alekhine game to be most instructive.

Sep-18-16
Premium Chessgames Member
  agb2002: <Patriot: <agb2002> <C.1) 28... Ne3 29.Ne6+ Kh6 (else 30.Qg7#) 30.Qg7+ Kh5 31.Be2+ Kh4 32.Qg4#.> I assume you meant 32.Qg3# since 32.Qg4+ Nxg4.>

I have to admit that I forgot the knight.

<I don't care for the <B) 26...h6 27.Rf2> branch because it let's white off the hook without a fight (i.e. it doesn't seem critical). This might be good if another candidate (besides 26.Qh5) was also strong and more direct.>

This was my original intention but felt curious about White's attacking chances. However, I wouldn't have paid too much attention otb.

<But again, you do great work!>

Thank you!

Sep-18-16  YouRang: Insane Sunday 26.?


click for larger view

I (white) have my Q and R stuck in a knight fork, and I'm assuming that I'll be wanting to move my queen. Where to?

I notice some potential for a king attack at f7 if I advance Pd5 or play Rf1, so I should move my Q to where it can also hit f7. That suggests either Qf2 or Qh5. The benefit of <26.Qh5> is that this also double-attacks Pg5 thanks to Ne4.


click for larger view

If black takes the rook: <26...Nxc3>, then <27.Nxg5>


click for larger view

White threatens Qxh7+ ...Kf6 Ne4#, so black has to protect Ph7. How?

- If 27...Rh8, then 28.Qf7+ looks deadly (28...Kh6 29.Rxe5 ).

- If <27...Bf5>, then <28.Rf1> is a tactical pin on the bishop, e.g. 28...Bg6? 29.Rf7+!


click for larger view

Leading to a little king hunt: 29...Bxf7 30.Qxh7+ Kf6 31.Ne4+ Ke7 32.d6+ cxd6 33.Qxf7#

Unable to move the bishop, black must protect it: <28...Qf6>


click for larger view

Now <29.Ne6+> exposes the double-attack on the pinned bishop. Then <29...Rxe6 30.Rxf5> and black must lose the queen or rook .

Not too insane. Once you spot the benefits of 26.Qh5!, the rest seems to fall into place.

~~~~~

BTW, if black *doesn't* take the rook on move 26, but decides instead to guard f7 (e.g. 26...Rf8), then white is still much better after 27.Nxg5 (black must now guard Ph7), e.g. 27...Bf5. Now 28.Rc3 gets my rook out of take, and prepares it for attacking (e.g. Rg3). Everything is in white's favor.

Sep-18-16  MaczynskiPratten: Two superb games overall for the Saturday and Sunday puzzles, both well worth looking through in full. Apart from the quality and knife-edge battling (agree with my fellow Englishman on this), I liked the visual position after Black's 19th move (opposing pawn phalanxes).

Surely it was not a tongue-in-cheek Chessgames joke to put games by Gormally and Aronian on successive days after they memorably came into closer contact off the board in 2005 (see kibitzing to D Gormally vs Sutovsky, 2005).

Sep-18-16
Premium Chessgames Member
  Jimfromprovidence: I am looking at 26...Rf8 as a defense.


click for larger view

I don't know which is better, 27 Nxg5 or 27 Rf2.

Sep-18-16  catlover: I tried 26.Qh5 Nxc2, 27.d6, thinking that the threat of Qf7+ and the fork on d7 would prove decisive.

Alas. Didn't work.

Sep-18-16  1stboard: What is wrong with white playing 31 Rg5 ! , instead of the text move ??
Sep-18-16  RandomVisitor: After 26.Qh5


click for larger view

Komodo-10.1-64bit:

<+3.82/36 26...Bf5> 27.Rf2 Bg6 28.Qg4 Rc5 29.Nxc5 bxc5 30.Qd7+ Qxd7 31.cxd7 Rd8 32.Rxe5 Rxd7 33.Rxg5 Re7 34.h4 Re1+ 35.Kh2 Kh6 36.Rg4 Rc1 37.Ba6 Re1 38.Rgf4 Kh5 39.Rf1 Re5 40.Bc4 Nc2 41.R1f2 Nd4 42.Kh3 Re3+ 43.g3 Be8 44.Kh2 Re5 45.Rf6 Re3 46.d6 cxd6 47.Rxd6 Re5 48.Kh3 Bg6 49.Rd5 Rxd5 50.g4+ Kh6 51.Bxd5 Kg7 52.h5 Be8 53.Rf4 Bb5 54.Rf7+ Kh6

+4.42/36 26...Rf8 27.Nxg5 h6 28.Rc3 Nf5 29.Nf3 e4 30.Rxe4 Qf6 31.Rf4 Rc5 32.Nh4 b5 33.Bd3 Rxd5 34.Bxf5 Bxf5 35.Rcf3 Qxc6 36.Rxf5 Qc1+ 37.Rf1 Qe3+ 38.Kh1 Qe6 39.Qf3 Rdxf5 40.Nxf5+ Kh7 41.Qd3 Qc4 42.Qb1 Kh8 43.Re1 Qg4 44.Ng3 Qg5 45.Re6 c5 46.Qe1 b4 47.Ne4 Qf4 48.Qg1 bxa3 49.bxa3 Kh7 50.Nxc5 Qf1 51.Re4 Qxg1+ 52.Kxg1 Rc8 53.Nxa4 Kg6 54.Kf2 Kf5 55.Rb4 Ra8 56.Ke3 Kf6 57.Rb6+ Kg5

+9.82/36 26...h6 27.Rf2 Bf5 28.Ref1 Rf8 29.Ng3 Bg6 30.Rxf8 Qxf8 31.Qxg6+ Kxg6 32.Rxf8 Rc5 33.Bd3+ Kg7 34.Rc8 Rxd5 35.Nh5+ Kf7 36.Bc4 Ke6 37.Ng7+ Kd6 38.Rd8+ Kxc6 39.Bxd5+ Kb5 40.Kf2 c6 41.Bf7 Ka6 42.Ke3 b5 43.Ke4 b4 44.axb4 Nc2 45.Ra8+ Kb5 46.Rb8+ Ka6 47.Nf5 Ka7 48.Rh8 Nxb4 49.Rxh6 Kb6 50.Rg6 Na6 51.Rxg5 Nc5+ 52.Ke3 Kc7 53.Ne7 Nd7 54.Ke4

Sep-18-16  mrandersson: @RandomVisitor. You use to be what i called mr rybka. All your analysis was from the rybka family of engines. Do you still use rybka or is it a case of its "old news" now?
Sep-18-16  catlover: <1stboard What is wrong with white playing 31 Rg5 ! , instead of the text move ??>

Good observation. Looks like 31. Rg5 would have been a good move. With that move, Stockfish puts white as being up 6.74, depth=24/45.

A possible continuation might be: 31. Rg5 Re8, 32. Bd3 e4, 33. Bxc2 Rc5, 34. Rxg6+ hxg6, 35. Qd1.

Sep-18-16  RandomVisitor: <mrandersson>Rybka is old news now. I may switch to stockfish because it is free.

Vas is now the lead programmer for Fritz and has stopped updating Rybka.

Sep-18-16
Premium Chessgames Member
  WorstPlayerEver: I use dozens of engines.
You can download 'em here:

http://www.computerchess.org.uk/ccr...

Just look at the engines which have scored at least a win to Stockfish and Komodo. You never know what they come up with. Although I mainly use them as kibitzers.

Sep-18-16
Premium Chessgames Member
  OhioChessFan: <RV> how about doing a Komodo vs Rybka match?
Sep-18-16
Premium Chessgames Member
  WorstPlayerEver: You can find all games between all engines on the above mentioned site and download them.
Sep-18-16  King.Arthur.Brazil: I feel happy, because I only did wrong the step 28.Rf8 where I' would play 28.Qf7+ followed by29.Rxf5. But, following black replies, I found the right answers for white, including Bg6! Thats enought for me. Good evening fellows.
Sep-18-16  1stboard: catlover: <1stboard What is wrong with white playing 31 Rg5 ! , instead of the text move ??>

Good observation. Looks like 31. Rg5 would have been a good move. With that move, Stockfish puts white as being up 6.74, depth=24/45.

A possible continuation might be: 31. Rg5 Re8, 32. Bd3 e4, 33. Bxc2 Rc5, 34. Rxg6+ hxg6, 35. Qd1.

>> Catlover .... Thank you for you comments , something along the line I was looking at. Not to mention , after this possibility you suggest with the moves shown above , black will still have an issue with the advanced white pawns on the C and D file and only having 2 rooks against a Queen and Bishop.

Sep-18-16  RandomVisitor: <OhioChessFan: <RV> how about doing a Komodo vs Rybka match?>

This site http://www.husvankempen.de/nunn/401...

gives Komodo a rating of 3235 and Rybka a rating of 2945, at tournament time controls.

That would be a kind of unbalanced match...

Sep-20-16  cehertan: Oh boy, someone needs to study carlsen's games more carefully. The tactical underpinnings are second to none.
Sep-20-16
Premium Chessgames Member
  WorstPlayerEver: Carlsen is like an iceberg.
Sep-20-16  morfishine: Exactly how does one pronounce "Sinquefield"?

I don't think we have an accurate answer to that question, thus impeding our efforts to move truly forward

*****

Sep-30-16
Premium Chessgames Member
  offramp: <morfishine: Exactly how does one pronounce "Sinquefield"?>

England is home to the Cinque Ports, https://en.wikipedia.org/wiki/Cinqu....

In this case the word Cinque is pronounced as "Sink". That is exactly how I pronounce the Sinque in Sinquefield.

I shall not elaborate on how I pronounce Field: it is totally standard.

Jun-04-17  ZackyMuhammad: Perfect game by Aronian.
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