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Hikaru Nakamura vs Yasser Seirawan
US Championship (2012), St Louis, MO USA, rd 11, May-19
French Defense: La Bourdonnais Variation (C00)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 14 OF 14 ·  Later Kibitzing>
Oct-17-13
Premium Chessgames Member
  agb2002: 29.Nd4 is better than 29.Nxc4 because the latter permits the intermediate 29... Rxc6.

However, after 30.bxc6 Qxc6 (30... dxc4 31.Rd6 Bxd6 32.exd6+ looks winning) 31.Rd4 Rc8 32.Rc1 Stockfish calculates +3.4.

Oct-17-13  Nick46: Any other takers for reverting back to the three day week? :o)
Oct-17-13  Abdel Irada: Once again, it appears I post too late to add anything to what <Phony Benoni> has already said.

Black's position would probably be only slightly worse, even given the ominous Q@c3-K@g7 lineup, *if* White couldn't drive the queen from e6 and open the diagonal. Once he does that, the game is mere apocalypse for Black.

Oct-17-13
Premium Chessgames Member
  morfishine: I've see this one: Attack the Queen with <29.Nd4>, then open up the diagonal with <30.e6>, then crunch

Why can't I ever do this?

*****

Oct-17-13  woody b: <independentthinker> i guess you refer to the line
29. Nxc4 dxc4 30. Nxe7 Qxe7 (Nxe7 31. Rd6!) 31. Rd7! Qe6 (Qxd7 32. e6+; 31. ... Qe8 32. e6+ Kg8 or Kh6 and white will win after 33. Rxf7) 32. Rad1 which was also my 'solution'.
it is probably winning but not as fast as in the game
Oct-17-13  Bartimaeus: <Jausch46, LTJ> 30. Nxe6+ seems quite good. However, after

30. Nxe6+ Kf7 31. Qg7+ Kxe6 32. Qxg6+ Bf6

though white has definitely the better position, i didn't see as clear an advantage as i saw after Nxf5+. Maybe the engines have a stronger continuation after Nxe6 but the above line is why i chose Nxf5+ over Nxe6+. Overall, Nxf5+ seems a cleaner win to me.

Oct-17-13  Bartimaeus: Apologies, Nxe6+ too wins clearly. Taking my above line further,

31. Nxe6+ Kf7 32. Qg7+ Kxe6 33. Qxg6+ Bf6 34. Bd4 Rf8 35. Re1+ and the bishop is won.

Both lines appear to be equally good.

Oct-17-13
Premium Chessgames Member
  kevin86: Boy! Black's game is coming apart quickly!
Oct-17-13  M.Hassan: "Medium"
White to play 29.?
Equal.

White can start to attack the Queen:
29.Nd4 Qd7
30.e6 fxe6
31.Nxf5++
This double check, opens up the diagonal for the White Queen attack 31.........Kf8
32.Qg7+ Ke8
33.Qxg6+ Kd8
34.Nxc4 Rxc4 (not...dxc4)
35.Qg8+ Qe8
36.Qxe6 Rc5
37.Rxc5+ Kc7
38.Nxe7
Black is now shattered.

Oct-17-13  LIFE Master AJ: 29.Nd4!, followed by 30.e6! is instantly decisive, I annotated this game for another state's chess newsletter.
Oct-17-13  LIFE Master AJ: The threat is 31.NxP/f5+ with mate to follow.
Oct-17-13  Overgod: Too easy.
Oct-17-13  Vincenze: Seirawan got into a real mess. That was an easy to medium.
Oct-17-13  JG27Pyth: Solved it, and I'm not surprised Seirwan resigned after 30.e6... but continuing 30...fe 31.Nxf5+ Kf7 32.Qg7+ Ke8 the best I can find for white is 33.Qxg6 with white up a piece and holding all the cards ( ) ... I don't see a clear continuation to mate. White has play against both the Black King and Black queen which pretty quickly lead to even more material lost for black... but does somebody see a clean path to mate, cuz I couldn't find it?
Oct-17-13  galdur: Nice job by white. Made it look simple. I seemed to be reminded of Bobby.
Oct-17-13
Premium Chessgames Member
  Penguincw: I considered 29.Nxe7.
Oct-17-13  Patriot: 29.Nxc4 looks like the beginning of a nice combination.

29...dxc4 30.Nd4 Qd7 31.e6 (attacking the queen while paving the way for a double check) fxe6 32.Nxf5+ at least wins the queen.

29...dxc4 30.Nd4 Qd7 31.e6 Qb7 32.Nxf5+ Kf8 33.Qg7+ Ke8 34.Qxf7#

29...Rxc6 30.bxc6 Qxc6 looks like no problem for white. I'd say this is the best choice for black.

29...Nxf4 30.Bxf4

Oct-17-13  Patriot: Ok, so 29.Nxc4 wins and 29...Rxc6 is best for black. But there's no doubt, 29.Nd4 is more direct and much cleaner.
Oct-17-13  Patriot: <morf> <Why can't I ever do this?> You have the same problem?? Me to! :-)

<agb2002> <29.Nd4 is better than 29.Nxc4 because the latter permits the intermediate 29... Rxc6.> Exactly! I went with 29.Nxc4 as well and there is certainly nothing wrong with it.

Oct-17-13  savuflorin1983: Nxc4 might be answered by Rxc6, and there is no Nd4 anymore :)
Oct-17-13  newton296: 29)Nd4! naka bomb!
Oct-17-13  LoveThatJoker: <Bartimaeus> Thanks for the note, man. When I checked the lines last night with the engine, it stated that yours is superior in that the Black K is basically on the edge of the board with a thirsty White Q and N looming forbodingly over him.

In the line I went with, the moves you presented are (from what I recall) in keeping with what Stockfish presented, but the Black K seems to have more options.

Therefore, your line is clearly the better of the two. I think your line was in the +10.00 (or more even); whereas mine was in the +6.00/+7.00.

Thanks for looking at it though, I appreciate you taking the time to do so sincerely!!

LTJ

Oct-17-13
Premium Chessgames Member
  DiceToThat: I really liked this puzzle. Usually the winning move is something much more aggressive, but here the crushing blow seemed like more of a retreat. All sorts of terrible things happen to Black after that Queen moves.
Oct-03-16  Xeroxx: Tricky tricky.
Jan-19-17  williamschill: Does 28..Bc5 offer any better survival chances?
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