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

Peter Leko vs Etienne Bacrot
Dortmund Sparkassen (2009), Dortmund GER, rd 5, Jul-06
Queen's Indian Defense: Fianchetto. Nimzowitsch Variation (E15)  ·  1-0

ANALYSIS [x]

FEN COPIED

explore this opening
find similar games 16 more Leko/Bacrot games
PGN: download | view | print Help: general | java-troubleshooting

TIP: You should register a free account to activate some of Chessgames.com's coolest and most powerful features.

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]

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
Jul-30-09  Patriot: Initial candidates: Nf6+,Nh6+,Qxf8+

Both Nh6+ and Qxf8+ seem either useless or losing.

37.Nf6+ Bxf6 (37...Kh8 38.Qh2+ Bh6 39.Qxh6#) 38.gxf6

This threatens 39.Qxf8+ Kxf8 40.Rd8#. Black has useless checks on a1 and d1, but I don't see a decent defense for black.

-----------

I never considered 38...Rc8, but have no problem deciding on 37.Nf6+ regardless. It seems the only winning attempt and is the only move that pressures black. There doesn't seem to be anything better.

Jul-30-09  jsheedy: 37. Qh2 looks promising. Threat is 38. Nf6+ with mate to follow. If 37...f6 (or ...f5), 38. gxf6, Rxf6 (...Bxf6, 39. Qh7#), 39. Nxf6+, Kf8 (...Bxf6, 40. Qh7+ etc.), and white wins in a move or two (I haven't set up the position, so I don't have a clear picture). Let's check it out...
Jul-30-09  jsheedy: OK, so 40. Qh7 is not a check, but it still wins. My variation may not be quickest, but I think it's sound.
Jul-30-09  LIFE Master AJ: I found the solution fairly quickly, however, what really interested me was how Black got himself into this predicament in the first place.
Jul-30-09  newton296: couldn't get it , tried for hours too !
Jul-30-09  jsheedy: I think I just refuted my line. 37. Qh2?!, Qa1+, 38. Kg2, Qa6!, 39. Rd6, Qb7+, 40. Kg1, Qe7 and black's Queen is back in play and helping to defend the weak f6.
Jul-30-09  newzild: Missed it today.
Jul-30-09  LIFE Master AJ: I start my analysis by "picking up" this game, beginning with White's thirty-fourth move.


click for larger view

34.Qd6,
This is good, but it is not the only move for White in this position.

[The box likes: (>/=) 34.Kg2, here for White, and so do I. (34.Kg2, a slight plus for White - Fritz 11.) ]

34...g6!?; (Is this necessary?)
I am not even sure about this move, it does weaken the dark squares a lot. (However, Bacrot was in zeitnot here, and maybe was worried about Leko eventually playing g5-g6. My first impulse was to play 34...Qb3; in this position.)

However, after checking things with the box, it seems that "the iron monster" agrees with Bacrot, 34...g6 might be forced (or best).

35.Nh2!?, (hmmm)
This gives White a win, but probably was not the best move for White.

[Better was: >/= 35.Qc5, with a slight plus for White, - Fritz 11.]

35...Bc3;
The best move here for Black.

36.Ng4 Bg7?; (Really - '??')
Black throws away a pretty decent position with this one errant move.


click for larger view

Now we have reached the position for ChessGames P.O.T.D. ("Problem of the Day.")

[After the following moves: >/= 36...Qxb4; 37.Qxb4 Bxb4; 38.Rxa7, (with an advantage) I think that it would be problematic (at best!) for White to win - from here. ]

White to play and make his 37th move in this position.

37.Nf6+,
Sometimes the most direct move is the best move.

[Less effective would be: </= 37.Kg2?! a5; 38.Rd8.]

37...Bxf6[]; (Box.)
This is completely forced.

[Of course not: </= 37...Kh8??; and now 38.Qh2+, ( ) and it's mate next move. ]

38.gxf6, (The most aggressive.)
This is the best move for White.


click for larger view

Now White has many threats. You have to be a pretty decent player to see that White threatens a simple win here: 39.QxR/f8+!, KxQ/f8; 40.Rd8#.

In this position Black should play ...Re8. Another (less obvious) win would be: 38...Re8[]; 39.Qe7!, RxQ/e7; Black may as well take, to retreat to f8 allows QxR+, winning.) 40.fxe7, and Black cannot prevent White's pawn on e7 from promoting.

[</= 38.Qxf6? Qxb4; 39.Rxa7, "="]

Now Black is quite lost, however Fritz shows that playing the Rook to e8 was the only decent try for Black.

38...Rc8!?; (Maybe '?!' or '?') 39.Rxf7!,
Black resigns. (Taking the Rook allows Qe7+ and mate next move.)

1-0

http://www.lifemasteraj.com
http://www.ajschess.com

Jul-30-09  ounos: The game is too recent to make a good puzzle :(
Jul-30-09
Premium Chessgames Member
  kevin86: A good puzzle-even if it was only a few weeks old. Why not-did it cry?
Jul-30-09  JG27Pyth: Impressive solution today, Dzechiel! You improved Bacrot's defense with 38...♖e8! (preventing 39.♖xf7 -- everyone else's centerpiece move doesn't even rate an exclamation point in your analysis -- it's just a variation to be avoided. :) and you find 39.♕e7! Nice.

to reiterate the remainder of Dzechiel's solution...

39.♕e7! (39.♖e7?! ♖f8) 39...♖xe7 40.fxe7
♕a1+ 41.♔g2 ♕e5 42.♖d8+ ♔g7 43.e8=♕

*engine confirms this variation was Black's best defense... but it's quite hopeless.

Jul-30-09
Premium Chessgames Member
  Jimfromprovidence: I tried 37 Nh6+ instead... I think it wins a couple of pawns worth of material.


click for larger view

What follows is 37Bxh6 38 gxh6 Qa1+ 39 Kg2 (all look forced), then 39... Re8 (to prevent h7+)


click for larger view

Now 40 Qf4 (threatening Qxf7) Rf8 (forced) 41 Rxa7! (If 41Qxa7, 42 Qf6, winning the queen) Qd1 42 Ra5 Qd5+ 43 e4 Qd4 44 Rxb5.


click for larger view

Jul-30-09  gofer: I had a look a couple of moves earlier to see if black could avoid the issues created by 36 ... Bg7?

What I found was that if black doesn't play Bg7 then white can even not play Nf6 and instead dance around the black king (if black takes the Knight when it moves to f5 then it gets caught with Qh6+ Kg8 g6 mating!), so we might get...

36 ... Qa1+
37 Kg2 Qb2?/a6?

38 Nh6+ Kg7 (protecting the rook)
39 Nf5+ Kg8 (protecting the rook)
40 Ne7+ Kg7 (not allowing Qh2+ mating)
41 Nxg6 Re8 (there could be better but lets assume not...)

42 Ne7 Kf8 (to avoid Qh6#)
43 Nf5+ Kg8 (forced)
44 Nh6+ Kh8 (to avoid Rxf7+)
45 Nxf7+ Kg8 (to avoid Ne5+ mating)
46 Nh6+ Kh8 (forced)

So the knight has cleared all blacks defenses...

:-)

with Qg6 to follow...

Jul-30-09  gofer: I agree with you <JG27Pyth>, <dzechiel>'s post is spot on...!
Jul-30-09  TheChessGuy: Black is tied up and Leko swiftly carries out the execution.
Jul-30-09  LIFE Master AJ: <Summerfruit> In your line, 39.Rd8 isn't forcing. Black plays a Queen check on a1 then ...Qe1.
Jul-30-09  LIFE Master AJ: <Summerfruit> See my analysis - which was all checked with Fritz 11 - for the correct continuation.
Jul-30-09  WhiteRook48: 37 Nf6+ solves the puzzle
37...Kh8 38 Qh2#
37...Bxf6 38 gxf6 with ideas of Qd6-h2-h6-g7#
Jul-30-09  CHESSTTCAMPS: <WhiteRook48: 37 Nf6+ solves the puzzle 37...Kh8 38 Qh2#
37...Bxf6 38 gxf6 with ideas of Qd6-h2-h6-g7#>

I agree with the first part; however the 2nd part (an idea that I looked at too) doesn't work (with WQ on h2 or h6) because of Qa1+ then Qxf6.

<Jimfromprovidence>

An interesting and different (if longer) approach, and your analysis looks solid. It's worth noting that 39... Qh8 (instead of Re8) loses to Qxf8+. Not surprising that white has more than one way to win with such an advantage.

<..<dzechiel>'s post is spot on...!>

Not an uncommon occurrence!

Jul-30-09  OBIT: In a tournament game, I'd play 37. Nf6+ Bxf6 38. gxf6, threatening 38...Qxf8+! So, the rook has to move, and after 38...Rc8 or 38...Ra8, 39. Rxf7 looks convincing. 38...Re7 has me stymied, however, and I've used as much time as I would normally with a clock running. Lemme me now what I should have found....
Jul-30-09  OBIT: Ah, OK... after 38...Re7 39. Qe7! and if 39...Rxe7 40. fxe7 and the pawn promotes. Do I see this when I get to the position? Hope so...
Jul-30-09  TheBish: Leko vs Bacrot, 2009

White to play (37.?) "Medium"

I only had one candidate move, and I found the winning idea right away.

37. Nf6+ (pretty obvious, but it's the follow-up that matters) Bxf6 (forced, or mate follows after 37...Kh8 38. Qh2+) 38. gxf6

Now White threatens 39. Qxf8+! Kxf8 40. Rd8#, so Black must move the rook.

A) 38...Qa1+ (this can come later as well) 39. Kg2 Re8 40. Qe7! (better than 40. Rd8 Rxd8 41. Qxd8+ Kh7 42. Qe7 Qa2 43. Qf8 Qd5+, which draws) Rxe7 (or 40...Rf8 41. Qxf8+) 41. fxe7 Qe5 42. Rd8+ Kg7 43. e8=Q and wins.

B) 38...Rc8 39. Rxf7! and wins, since 39...Kxf7 40. Qe7+ Kg8 41. Qg7#, and 40. Rg7+ Kh8 41. Qh2 mate is threatened.

Jul-30-09
Premium Chessgames Member
  johnlspouge: Thursday (Medium):

Leko vs Bacrot, 2009 (37.?)

White to play and win.

Material: N for B. The Black Kg8 has 2 legal moves, both on the h-file. The White Qd6, Ng4, and Pg5 attack the weak dark squares around Kg8, defended only by the Black Bg7 in the complete absence of the Black Qa4. The White Rd7 attacks Pf7, which Ng4 can attack in 1 move. The White Kg1 is vulnerable to the checks Qa4-a8+ or Qa4-d8+, which the White battery on the d-file presently defends, but even without the defense, perpetual check is unlikely.

Throughout the following, Black can interpose [1]Qa1 [2]Kg2, to no avail.

Candidates (37.): Nh6+, Nf6+

37.Nf6+ Bxf6 [Kh8 38.Qh2+ Bh6 39.Qxh6#]

38.gxf6 (threatening 39.Qxf8+ Kxf8 [Kh7 40.Qg7#] 40.Rd8#)

(1) 38R to between c8 and a8

39.Rxf7 (threatening 40.Rg7+ 41.Qh2#)

39Kxf7 40.Qe7+ Kg8 41.Qg7#

(2) 38Re8 39.Qe7 (threatening 40.Qxf7+ 41.Qh7#)

39Rxe7 [Rf8 Qxf8+ again]

40.fxe7 (threatening 41.e8=Q+ or 41.Rd8+ 42.e8=Q)

Black cannot prevent e8=Q+, White is up a R.

Jul-31-09  Amarande: Nf6+ is obvious, as is the fact that a hasty Queen's move will easily make things at the least more difficult due to the fork, Qa1+.

Less obvious is the Rook sacrifice, which I missed (and did not see the followup for until I read earlier posts). I instead found another move which appears to be just as resignable as White's actual move, and with the bonus of being one of those venomous quiet moves that always have a certain beauty to them:

39 Qf4!

<zanshin> considered this, and then wondered if White had time for this. The answer is indeed a resounding yes, however, the immediate threat is not yet 40 Qh6? (which would lead once again to the same fork Qa1+ that thwarts 39 Qh2?) but instead a lethal in-between move: 40 Rd6!!

In other words, White does not immediately threaten Qh6 - he instead *threatens to defend*! 40 Rd6!! would protect the f-pawn, making the threat of Qh6 real. At this point Black cannot flee with the King, since 40 ... Kf8 allows 41 Qh6+ Ke8 (or Kg8 42 Qg7#) 42 Qh8#, while 40 ... Kh7 falls to 41 Qh4+ and 42 Qh6, with mate to follow.

Therefore, Black cannot allow Rd6 without losing his Queen (as it would have to be given up for the f-pawn, after which he would probably still succumb to mate, just as if he gives up the Queen for the f-pawn after the actual 39 Rxf7). The question then arises as to whether Black has a suitable way to prevent this threat.

The answer would seem to be no:

39 ... Rc6 (to challenge the Rook; 39 ... Rc4 to drive the Queen fails similarly) 40 Rd8+ Kh7 41 Qh2 does the honors.

39 ... Rc1+ 40 Kg2 and Black has no good continuation, being threatened with both 41 Rd8+ and 41 Rd6.

39 ... Qa1+ 40 Kg2 and Black still hasn't come up with a more permanent way of preventing Rd6, nor is Rc6 viable here either.

In other words, it definitely seems that both 39 Rxf7 and 39 Qf4 are immediate wins, depending on your choice of violent or quiet.

Jul-31-09  LIFE Master AJ: <Amarande>

"Your" move, 39.Qf4, does NOT work!

I spent a few minutes with Fritz 11, and here is what I came up with:

</= 39.Qf4? Qa2!; 40.Rd6!? Qb1+; 41.Kg2 Qf5; 42.Qxf5 gxf5; 43.Rd5, <(A plus over an equal sign.)>

and White probably has a small advantage, but as far as being as good as what was played in the game ... its not even close. (Sorry.)

Jump to page #    (enter # from 1 to 3)
search thread:   
< Earlier Kibitzing  · PAGE 3 OF 3 ·  Later Kibitzing>
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?]
from beautifull attacking combinations by totololo
from Collection of Collections- Tactics by takchess
Pawn f6, you know
from 95a_QR endgames --> Heavy pieces in action by whiteshark
37.? QID. Fianchetto. Nimzowitsch Var (E15) 1-0
from Nolan's Road Crew by fredthebear
37.? (Thursday, July 30)
from POTD Indian (Not King's Indian,Bogo or Nimzo) by takchess
No way to find a grip
from beautifull attacking combinations by totololo
37. Nf6+!
from Weakened Castled Position by Jaredfchess
The R sacrifice is a booby-trap.
from Stratagem Wins by sevenseaman
Strategic battles
by TheDestruktor
White 37?..
from Guess The Move II by Ercan
37. Nf6+!
from Weakened Castled Position by trh6upsz
Zoek annotaties van GM Spraggett op zijn bLogg
from Roemer's favorite games by Roemer
37.? (Thursday, July 30)
from Puzzle of the Day 2009 by Phony Benoni
37. Nf6+!
from Weakened Castled Position by patzer2
quenn's indian defense
from benjobench's game collection by benjobench
Leko wins vs. Bacrot ... but (?)
from "ChessGames" >Problem of The Day< (2009) by LIFE Master AJ
Direct attacks
by TheDestruktor
Dortmund 2009
from # Greatest Tournaments 2009 by Qindarka
AdrianP's bookmarked games (2009)
by AdrianP
37.? (July 30, 2009)
from Thursday Puzzles, 2004-2010 by Phony Benoni


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