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Zbigniew Ksieski vs David Navara
Staufer op 10th 1998  ·  Gruenfeld Defense: Exchange Variation (D85)  ·  1-0
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sac: 21.Rxe7 PGN: download | view | print Help: general | java-troubleshooting

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Sep-12-06  bakuazer: it was of course very easy and quick, but instead of 24.Re1 I played 24.Bxf7 Kxf7 25.Re1. I think this still wins and is even nicer, am i right?
Sep-12-06
Premium Chessgames Member
  Sneaky: Definitely a Tuesday puzzle. It's harder than a Monday puzzle, but too easy for a Wednesday.

<instead of 24.Re1 I played 24.Bxf7> That's fine, it's all just as well once you get that queen off the board, I think.

Sep-12-06  prinsallan: I was looking at Rxf5, anyone who can tell me if this works. I played against Sigma Chess for Mac and came up with this: 21. Rxf5 gxf5
22. Ne6 Rf7
23. Rc3 Nxd5
24. Rg3+ Kh8
25. Ng5 Rg7
26. Qxd6 exd6
27. Bxd5 Re8
28. h4 Re1+
29. Kh2 f4
30. Rf3 Rc7
31. Rxf4 Rd7 -White has superior position after this, but I can't tell if the computer screwed up.

-Prinsallan

Sep-12-06  greensfield: Found key move 21.Rxe7 straight away as this takes black Queen out of the way to bring the Bishop into the attack with 21...Qxe7 22.d6+ with winning game. Didn't find Whites nice line to the win though.
Sep-12-06  Microbe: I saw the rook sac within a few minutes. Cute little discovered check eh?
Sep-12-06  EmperorAtahualpa: I found 21.Rxe7 within 20 seconds or so. But 21.Rce1 is indeed even better! Those are one of those moves that typically computers tend to find and not humans.
Sep-12-06
Premium Chessgames Member
  Chris1Clark: I got it quick but rather worked with 24 Bxf7+ Kxf7 25. Re7+ Kg8 26 Qg7# seemed more forced and diffinitive.
Sep-12-06  arnaud1959: Anyway 10.d5 is a classical move, sometimes with a Knight on c6. If black takes on c3, he must continue the game without his black squared bishop which is very unpleasent. So, cxd is better before Bc6 I think.
Sep-12-06  starkidaway: <prinsallan> I think your line loses after 23 Rc3; for example

23 Rc3 Kh8 should hold (NXd5 loses like your line rightly points out) 24 Rg3 Qe5 (threating the back rank with mate)
24 Rg7 Raf8 (and white's attack backfired)

Sep-12-06  starkidaway: I went with the Rce1 line...this is what I thought

21 Rce1 Rae8
22 Rf5 gxf5
23 Re6 QxR (23...Qe7 then 24 e6 should win)
24 NxQ Rf7
25 Be2 and white should win.

I believe this whole line is almost all forced.

Sep-12-06
Premium Chessgames Member
  Honza Cervenka: One of not the bests of Davidek's Gruenfelds. 9...Bc6 with the following looks quite dubious to me.
Sep-12-06  DavidDylanRoberts: What about 21.Ne6 Be6 22.Re6 Q-any 23.D6 threatening Re7?
Sep-12-06  Tariqov: 21.Ne6? i think loses to ..Rf7.
Sep-12-06  zb2cr: Saw the simple Rook sacrifice leading to the discovered check winning the Queen very quickly, under 15 seconds. The mate threat on g7 forces the capture on e7; Black can't move the Knight without allowing mate on h7; and blocking with the Rook on f7 doesn't work, since White just plays Rxf7 to renew the mate threat.

Oh, <Chris1Clark>, I think you wrote something down wrong. You can't play 24. Bxf7+, Kxf7; 25. Re7+ because the Rook on the e-file is gone, sacrificed. You would need to bring the other Rook over to Re1 first so there would be a White Rook available on the e-file.

Sep-12-06
Premium Chessgames Member
  YouRang: It took me a minute, but I found it. I spent some fruitless time looking for ways to deflect the knight (which was preventing Qxh7#).

Once I abandoned that idea, the threat of 21. Rxe7 (threat: Qg7#) followed by 21...Qxe7 d6+ winning the queen came into view pretty quickly.

Sep-12-06
Premium Chessgames Member
  YouRang: <Honza Cervenka: One of not the bests of Davidek's Gruenfelds. 9...Bc6 with the following looks quite dubious to me.> I agree (not that I know much about openings). As played, 9...Bc6 picked up a pawn, but White had compensation in the form of better development and central control.

I wondered why Black played 11...Bxd2 instead of taking the rook. Perhaps he didn't like the look of:

11...Bxa1
12. Qxa1 f6 (prevent Qxh8+)
13. dxc6 Nxc6 (diagram:white to move)


click for larger view

Materially, Black has a rook and a couple pawns for a pair of bishops, but again, White is way ahead in development and mobility, and Black's king looks unsafe (particularly if White follows with 14. Bh6).

Sep-12-06  uuft: What gives with them rook 'sacs' lately? Did not even bother to consider it this time. And it's kind of hot outside... So no biggie! :p
Sep-12-06
Premium Chessgames Member
  kevin86: I saw that a discovered check from the bishop would be strong-so I easily found the rook sac at e7. Other moves win as well-so the puzzle is actually easier than it looks.
Sep-12-06  EmperorAtahualpa: In this game, I think Black's fatal mistake was 18...fxe5 because it enabled 19.Ng5.

Therefore, would perhaps 18...Nxe5 have been any better?

Sep-12-06
Premium Chessgames Member
  YouRang: <EmperorAtahualpa:><Therefore, would perhaps 18...Nxe5 have been any better?> Yes, perhaps.

However, white still has that latent threat of d6+ that he can spring at the appropriate time. For example, White can pile up on the e7 pawn with his rooks and force exchanges such that Black ends the exchanges with ...Qxe7 -- and once again the d6+ wins.

It might go like this:

18...Nxe5
19. Nxe5 fxe5
20. Rxe5 Re8 (protect e7)
21. Rce1 (double up on e7) Qd6
22. Rxe7 (threat: Qg7#) Rxe7
23. Rxe7 Qxe7 (exchange away...)
24. d6+ (wins queen)

Sep-12-06  greensfield: <starkidaway>,<EmperorAtahualpa>,<RandomVisitor> In the 21.Rce1 line, although winning I think, can Black make it more difficult with:- 21...Rce1 e6 22. dxe6 Qe7
Sep-12-06
Premium Chessgames Member
  Honza Cervenka: <YouRang> At first glance without any calculating of lines I would say that after 11...Bxa1 12.Qxa1 black's dark squares are very weak and white can easily dominate there. I would have taken the Bishop like Navara did without any big hesitation.
Sep-12-06  MiCrooks: The question is after 11...Bxa1 12. Qxa1 what do you do with your Rook on h8 and your Bishop on c6? You'd be dropping two pieces for the Rook AND be sticking your King in the Middle under attack as O-O for instance allows Bh6 threatening mate and winning a piece (exchange on f8 then either save f8 Bishop of win c6 one)
Sep-12-06  Trouble: nice game nice problem
Sep-13-06  patzer2: White's sham sacrifice 21. Rxf7+! sets up a winning discovered check.
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>

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