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Yannick Pelletier vs Shakhriyar Mamedyarov
European Club Cup (2007), Kemer TUR, rd 3, Oct-05
Gruenfeld Defense: Three Knights. Burille Variation (D94)  ·  0-1

ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
Oct-15-07  notyetagm: Lazypawn says that Mamedyarov's novelty 9 ... c5-c4!


click for larger view

is going to give White fits in the e3/♗c4 Grunfeld.

The basic idea is that Black will play the typical manuever ... e7-e5, ... ♘b8-c6, attacking the White d4-pawn, but only -after- having gained space on the queenside.

This novelty and strong followup by Mamedyarov could not have gone better. <<<When was the last time you saw a 2600+ lose a White game in less 30 moves?>>> Mamedyarov missed winning a miniature by one measly move!

Oct-15-07  notyetagm: Final position:


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The Black c4-passed pawn is supported by the Black d3-rook, b2-bishop, and a4-knight.

You want to talk about grooming a passed pawn for promotion!

Oct-17-07  notyetagm: White (Pelletier) played 15 ♕f3-e4?!, knowing that Black (Mamedyarov) would capture the White e5-pawn with his Black c6-knight, as Mamedyarov did with 15 ... ♘c6xe5.

Position after 15 ♕f3-e4?! ♘c6xe5:


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White's idea was that now he could force a queen trade with 16 f2-f4??, his main line being 16 f2-f4?? ♘e5-c6?! 17 ♕e4x♕e7 ♘c6x♕e7.

(VAR) Position after 16 f2-f4??:


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But Black has a -much- stronger alternative than acquiescing to the queen trade by meekly playing 16 ... ♘e5-c6?!: he can play 16 ... f7-f5! and <TRAP> the White e4-queen which has <NO RETREAT(!)>.

(VAR) Position after 16 f2-f4?? f7-f5!:


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Now we see the major tactical problem with 16 f2-f4??: it greatly <LIMITED THE MOBILITY> of the White e4-queen. In fact with 16 f2-f4?? White has just <SELF-BLOCKED> the only flight square (f4) available to the White e4-queen! That is, the f4-square was the -only- square available to the White e4-queen before 16 f2-f4?? (♕e4-d4?? ♘e5-f3+ <discovered attack with check> and ... ♗g7x♕d4).

Whenever you move a piece or a pawn, you need to ask not one but -two- questions concerning <TRAPPED PIECES>:

<<<

1) Did I just trap the piece that moved?

2) Did I just trap another one of my pieces by limiting its mobility (self-blocking a flight square, cutting off a line of retreat)?

>>>

Here the first question is what applies to the move 16 f2-f4??.

Oct-17-07  notyetagm: Position after 15 ♕f3-e4?! ♘c6xe5:


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This position is a -tremendous- example of the danger involved in having <NO RETREAT(!)> or <LIMITED/RESTRICTED MOBILITY> for your pieces.

<<<Look at the White e4-queen in the above diagram. Where can she retreat?>>> That is, where could she move to on the White side of the board (or move laterally along the rank) if Her Majesty was attacked?

<<<The answer is: only(!) one(!) square(!), the f4-square.>>> Let's see: d3 is defended (Black c4-pawn), c2 is self-blocked (White c2-bishop), d4 is defended by discovery (Black g7-bishop), c4 is defended (Black b6-knight), e3 is self-blocked (White e3-pawn), f3 is defended (Black e5-knight), g2 is self-blocked (White g2-pawn), g4 is defended (Black e5-knight), and finally h4 is defended (Black e7-queen). Every square that the White e4-queen would like to escape to is either <DEFENDED> by a Black piece or <SELF-BLOCKED> by a White piece.

So if the White e4-queen were to be attacked and needed to run away, there would be only -one(!)- square to go to, the f4-square. This means that White must tread -very- carefully in this position or his queen will be <TRAPPED (NO RETREAT(!))>.

Note in particular how this <LACK OF MOBILITY> for the White e4-queen means that 16 f2-f4??, intending to trade queens as I wrote above, loses to 16 ... f7-f5!, <TRAPPING> the White e4-queen after the blunder 16 f2-f4?? <SELF-BLOCKED> the White e4-queen's only flight square, The f4-square.

(VAR) Position after 16 f2-f4?? f7-f5! <trapping White e4-queen>:


click for larger view

Jul-12-15  mathlover: The novelty is not 8...c5 but that was played by Bobby before.

but 9...c4 is the novelty

Jul-12-15  mathlover: see my game on chess,com

http://www.chess.com/livechess/game...

in which my opponent prevent the Bg4-BxNf3 Idea still I was able to win.

The game is not upto the standard of GM for obvious reasons.

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Featured in the Following Game Collections[what is this?]
Lazypawn's Game Of The Week for Monday 10/15/07
from Lazypawn's Game Of The Week (ICC) by notyetagm
Black c4-passed pawn supported by d3-rook, b2-bishop, a4-knight
from Grooming pawns for promotion -- Seirawan by notyetagm


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