Yannick Pelletier vs Shakhriyar Mamedyarov (2007)

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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]

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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: click for larger view 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: click for larger view 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??: click for larger view 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!: click for larger view 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: click for larger view 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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