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Shakhriyar Mamedyarov vs Hikaru Nakamura
Chess Olympiad (2014), Tromso NOR, rd 11, Aug-14
Slav Defense: General (D10)  ·  1-0
ANALYSIS [x]

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Kibitzer's Corner
Aug-14-14  spysfi: Are there any winning plans for white after 37. ...g5 ? Just a patzer question...
Aug-14-14  MountainMatt: Shak hands Nak a draw with 40. g5, and Nak says "no thanks" with 40...hxg5. Indeed a "tragic blunder", as he tweeted.
Aug-14-14  parisattack: Amazing how complex such an ending can be sometimes.

What is the drawing line after 40.g5?

Good tournament for Shak; very steady and consistent play!

Aug-14-14  biskop: I don't quite get how White would go about winning the final position.

What if black e.g. plays 42...Rf2 and defends the f7 pawn for as long as possible?

Aug-14-14  parisattack: I thought the same thing at first. But White can take the f7 pawn anyway, the King-and-Pawn ending is won (opposition).
Aug-14-14  spysfi: @parisattack: White ignores f7 and goes 1. ...Rf5!! threatening 2. ...h6xg5 3. h4xg5 Rxg5 and the draw is near... For example 2. g5xh6 fails to 2. ...Kxh6 3. Bd1 f6!

@biskop: the threat is to sac on f7 when the white King is close enough to take the opposition

Aug-14-14  JohnBoy: In the final position I believe that white can put his king at d6 and then just take black's f pawn. The king & pawn ending is won for white.

My issue is the same a that of <parisattack>. Does black just ignore the white pawn at g5 as white cannot win by trading at h6 and winning the f pawn? The two issues that seem to matter are whether or not white can avoid a B & wrong rook pawn ending, or get to a favorable B & R v. R ending. I don't know enough about this last - i.e. when the stronger side wins.

Aug-14-14  biskop: Thanks <parisattack> and <spysfi>. It makes sense now.
Aug-14-14  Refused: I am curious how the win looks like after 40...Rf5 though.

The immediate 41.Rxf7+ does not work, I think.

e.g.
40...Rf5
41.Rxf7+ Rxf7
42.Bxf7 Kxf7

And I thinkn this should be a draw.

a) 43.Kd5 Ke7
44.Ke5 h5
Black has regained the opposition
a1) 43.Kd5 Ke7
44.Kc6? hxg5

b) 43.Ke5 hxg5
44.hxg6 Ke7 opposition

if white captures on h6, Black can simply fall back to h8-h7 with his King.

that leaves
40...Rf5
41.Be6 Rf1
And I can't see how white wants to make progress.

I am probably missing something important.

Aug-14-14  bavaria: Maybe Naka should have played 40. .. Rh2
Aug-16-14  SirRuthless: Nice result for Shakhriyar. He is developing a nice and bloody rivalry with Nak. He played the opening very well and the play was natural throughout the game. Then he found a nice trick near time control to seal the game. Azerbaijan had a good tournament overall.
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