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Hikaru Nakamura vs Sam Shankland
US Championship (2015), St Louis, MO USA, rd 6, Apr-07
Caro-Kann Defense: Advance. Short Variation (B12)  ·  1/2-1/2

ANALYSIS [x]

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Kibitzer's Corner
Apr-07-15  SirRuthless: Nakamura blew any chances by not giving the N for the B on move 29. Still probably would have been a draw but Shankland would have had to find some counter intuitive moves with the active white king infiltrating and attacking the weak e6 pawn. Tsk. Shankland needed a result so good for him.
Apr-07-15  Marmot PFL: Looked like white lost time due to opening indecision, moving the knight from d3 to e1 and back. By the time he found a plan black was ready to meet it.
Apr-07-15  Karposian: <Marmot PFL: Looked like white lost time due to opening indecision, moving the knight from d3 to e1 and back.>

No, you are mistaken. White did not lose any time when he played the Knight back to e1 in his 11th move, because he forced Black to retreat with his Knight also.

Black had to do this to avoid his LSB from being trapped. White threatened 12.g4 Be4 13.f3, and the Bishop is trapped. With the White Knight on d3 the Bishop was not trapped, because then Black could always play ...Bxd3.

Therefore Black had to play 11...Ne7, retreating his Knight from the g6-square to give his LSB an escape route.

Apr-07-15  Marmot PFL: When white played 10 Nd3 I thought he meant to play on the queen side instead of going back to the Ne1 and f4 idea (which didn't seem that good, as after black plays f5 white can't take en passant as the king pawn is pinned to the rook). But you are right about black also losing the move.
Apr-07-15  Marmot PFL: Or there was 14 fg5 hg5 15 Bxg5 but gets hit with f6.
Apr-07-15  Karposian: <Marmot PFL: Or there was 14 fg5 hg5 15 Bxg5 but gets hit with f6.>

Yes, you are correct. That line doesn't work for White because of Black's threats against h2 (16.exf6??, Qxh2+ 0-1). After 15...f6! all White has done is opening himself up for attacks after having given Black two dangerous semi-open files pointing towards his King.

Apr-08-15  patzer2: <SirRuthless: Nakamura blew any chances by not giving the N for the B on move 29.> Looks like a drawish position after 29. Nc5 Bxc5 30. dxc5 Rh8! = (+ 0.12 @ 26 depth, Deep Fritz 14).

Of course this line might be "counter intuitive" and difficult to find OTB, and the alternatives to 29. Nc5 slightly favor Black..

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