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Levon Aronian vs Vasilios Kotronias
World Team Championship (2010)  ·  Queen's Gambit Declined: Tarrasch Defense. Pseudo-Tarrasch Bishop Attack (D30)  ·  1/2-1/2
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Kibitzer's Corner
Jan-10-10  17.Bxg7: OMG, is this transcript correct? In move 49, without obvious time trouble, Aronian got his knight pinned instead of winning black knight with 49.Ne2. It looks like a horrible way to lose an advantage
Jan-10-10  ounos: I can't believe it! Greeks did it again!!! Hurray! (heh, someone is Greek amongst us :) :) :) )
Jan-10-10  ounos: Though this game indeed looks lost after 49. Ne2. Black can get his queen to f2, but after that, not much.
Jan-10-10
Premium Chessgames Member
  Eyal: Actually, on move 49 Aronian could have done even better than winning a piece with 49.Ne2 (though it should be enough to win as well) - <49.Qc4+> leads to mate or the loss of the black queen: 49...Kh8 50.Ng6+ Kh7 51.Qc8; or 49...Kh7 50.Qf7 Qd6 51.Ne6 Qe5 52.Nf8+ Kh8 53.Ng6+ Kh7 54.Nxe5; or 49...Kf8 50.Ng6+ Ke8 51.Qg8+ Kd7 52.Ne5+ Kc7 53.Qf7+ Kd6/b6 54.Nc4+ and 55.Nxa3.
Jan-11-10
Premium Chessgames Member
  notyetagm: Wow, what a terrible finish by Aronian: mate, winning a piece, or draw and Aronian picks draw.
Jan-11-10
Premium Chessgames Member
  notyetagm: 49 Nf4-d5?? <LINES UP> with the <UNDEFENDED> White d3-queen in a way that Black can exploit with 49 ... Qa3-d6!.

49 Nf4-e2! <LINES UP> with the <UNDEFENDED> White d3-queen in a way that Black *cannot* exploit, along the a6-f1 diagonal.

Jan-11-10
Premium Chessgames Member
  notyetagm: Aronian vs Kotronias, 2010

<A TALE OF TWO PINS>

49 ?


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A *great* example about the need to be extremely careful when <LINING UP YOUR PIECES>. You can <LINE UP> your pieces, making <ALIGNMENTS>, but you must do so in a manner that your opponent *cannot* exploit.

49 Nf4-e2 <LINES UP> with the <UNDEFENDED> White d3-queen and wins because Black *cannot* exploit the <ALIGNMENT> White e2-knight + <UNDEFENDED> White d3-queen: the Black a3-queen cannot get to the f1-pinning square.

On the other hand 49 Nf4-d5??=, which Aronian(!) actually played, <LINES UP> with the <UNDEFENDED> White d3-queen in a way that Black can *exploit* to create a <PIN AGAINST UNDEFENDED PIECES> and throws away the win: the Black a3-queen *can* get to the d6-pinning square for 49 ... Qa3-d6!=.

So instead of playing 49 Nf4-e2 with a winning <PIN> against the <UNDEFENDED> Black a3-queen, Aronian instead played the horrible blunder 49 Nf4-d5?? and only draws due to the <PIN> against *his* <UNDEFENDED> White d3-queen!

An unbelievable blunder by Aronian.

49 Nf4-d5?? Qa3-d6!= <pin: d3>


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(VAR)
49 Nf4-e2 <pin: a3>


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Rybka 3 32-bit

6. (1.70): 49.Nf4-e2 Qa3-b2 50.Ne2xc3 Qb2xf2+[] 51.Kh2-h3 Qf2-c5 52.Qd3-d5+

This just shows what a hard game chess really is: a tactical genius like Aronian eschews the straightforward win by 49 Nf4-e2 for the drawing 49 Nf4-d5??=.

Wow.

But there I go again, getting "too excited about simple tactics". These "simple tactics" would have gotten Aronian an extra 1/2-point in this game! :-)

Jan-11-10
Premium Chessgames Member
  notyetagm: Game Collection: BALEFUL INFLUENCE: every single square attacked 49 ... Qa3-d6! Black d6-queen threatens 1-1 loose White d5-knight, undef White d3-queen Aronian vs Kotronias, 2010
Jan-11-10
Premium Chessgames Member
  notyetagm: <ounos: Though this game indeed looks lost after 49. Ne2. Black can get his queen to f2, but after that, not much.>

Yes.

Rybka 3 32-bit

6. (1.70): 49.Nf4-e2 Qa3-b2 50.Ne2xc3 Qb2xf2+[] 51.Kh2-h3 Qf2-c5 52.Qd3-d5+

Jan-23-10
Premium Chessgames Member
  notyetagm: 49 Nf4-d5??


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49 ... Qa3-d6!= <pin: d5,d3>


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Aronian's 49 Nf4-d5?? flaunted all of <WETESCHNIK'S PINNING RULES>:

* every attacked piece of yours standing in front of another of your pieces must be regarded as pinned

* always be on the lookout for ways to create or avoid pins

* two pieces of the same color occupying the same file or diagonal are a prerequisite for a pin

* every undefended piece is a potential candidate for a pin

Jan-24-10  percyblakeney: I wonder if Aronian's amazing blunder here wasn't influenced by the fact that Armenia sensationally just had gone 0.5-2.5 down in the match against Greece, and this game was suddenly of less importance than it could have been.
Jan-24-10
Premium Chessgames Member
  notyetagm: <percyblakeney: I wonder if Aronian's amazing blunder here wasn't influenced by the fact that Armenia sensationally just had gone 0.5-2.5 down in the match against Greece, and this game was suddenly of less importance than it could have been.>

Good point.

Perhaps the fact that his team had just shockingly lost to Greece(!) caused Aronian to lose concentration just long enough to play the drawing 49 Nf4-d5?? instead of the winning 49 Nf4-e2.

Apr-22-10  abuzic: 32...Nc4?? allowed white's dangerous attack. 32...Qd1! would keep black active. 36...Nd2? 36...Qf6 would keep black alive.
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Featured in the Following Game Collections [what is this?]
DO *NOT* ALLOW A PIN TO BE REINFORCED!!
by notyetagm
49 ... Qa3-d6! threatens 1-1 loose d5-knight, undef d3-queen
from BALEFUL INFLUENCE: every single square attacked by notyetagm
Capture
by MagnusKandinsky
49 Nf4-d5?? allows pin to undef d3-queen, 49 Nf4-e2 does not
from PINS AGAINST UNDEFENDED PIECES (UPMP) by notyetagm
49 Nf4-e2 winning pin for White, 49 Nf4-d5?? drawing pin!
from PINS! PINS! PINS! PINS! PINS! PINS! PINS! PINS! by notyetagm
48 Qd4-d3+ pins Black c3-knight to undefended a3-queen, winning
from UNDEFENDED PIECES by notyetagm
48 Qd4-d3+! pins c3-knight to undef a3-queen for 49 Nf4-e2+-
from BALEFUL INFLUENCE + TEMPO IS HOW YOU USE YOUR LI by notyetagm
48 Qd4-d3+ means White queen is really on 3rd rank creating pin
from FORCING MOVES SHOW YOU WHERE PIECES *REALLY* ARE by notyetagm
Bishop Attack
from Tarrasch by inlimbo777
48 Qd4-d3+ means White queen is really on 3rd rank creating pin
from BALEFUL INFLUENCE combined with tempo by notyetagm


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