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Gata Kamsky vs Baadur Jobava
Reggio Emilia (2010), Reggio Emilia ITA, rd 5, Jan-02
English Opening: Great Snake Variation (A10)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Jan-02-10  ajile: Nice game by Kamsky. Note how he takes advantage of Black's 5..Ne7 by pushing his h pawn. The resulting liquidation of pawns on the k-side clearly favored White.
Jan-02-10  mysql: Incomplete game score?
Jan-03-10  YouRang: Losing move:


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Here, black immobilized his own rook with <34...d5??>, where white trapped it with the simple 35.Ne6. The black rook has nowhere to go.

Black goes down the exchange, and white, interestingly, gives it back for a couple pawns and simplification. The 3-passed-pawn advantage should be easily decisive.

Jan-03-10  notyetagm: http://www.thechessmind.net/blog/20...

<He was caught there by Gata Kamsky, who defeated Baadur Jobava on the White side of a somewhat offbeat Botvinnik System English. (It was unusual, but it's strange that whatever program Mark Crowther of TWIC is using labels it "Dutch, QI and KID Systems".) Whatever it was, it led to a position where Kamsky was able to obtain an advantage by taking control of the light squares. Jobava's 19...a6 may have been inaccurate, as after 20.Bh3 Bxh3 21.Nxh3 (preventing ...f5) 21...Re5 22.Nf4 Rhe8 22.Nd5 White was clearly better. Black could achieve ...f5 before it would be forever too late, or he could protect his h-pawn, but not both. <<<White's advantage was significant but not decisive, however, until the blunder (probably in time trouble) 34...d5, losing the exchange to 35.Ne6.>>>>

Jan-03-10  chessic eric: Note that 34...Rxc1+ doesn't pickup two pieces for the rook after 35.Rxc1,Qxf4 36.Qg2 when there is no way to defend the knight (36...d5 37.Qxd5,Qf6 38.Qxb5+,Kc8 39.Rxc6 (Qxc6??,Qxb2#)).
Jan-03-10  notyetagm: 34 ... ?


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34 ... d6-d5??


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35 ♘f4-e6 <trapped piece: no retreat, lack of mobility>


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The tactical sequence 34 ... d6-d5?? 35 ♘f4-e6 would make a great addition to someone's Game Collection: Trapped pieces: lack of mobility, NO RETREAT(!).

Jan-03-10
Premium Chessgames Member
  HeMateMe: Pretty bold opening, I wonder if black should have focused more on picking up the weak h pawn, instead of trying to attack in the center.
Jan-03-10  notyetagm: Kamsky vs Jobava, 2010

Looks like Jobava has trouble with <TRAPPED PIECES>.

Jobava vs Grischuk, 2009

16 ... ♖b8-b6 0-1


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Kamsky vs Jobava, 2010

35 ♘f4-e6


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Jan-04-10  notyetagm: Jobava vs Grischuk => CCCCCCCCCCCCCCC Covered squares Kamsky vs Jobava => SSSSSSSSSSSSSSS Self-blocks

GC: TRAP PIECES BY TAKING AWAY THEIR FLIGHT SQUARES => GRISCHUK'S ... Nd7-c5! GRISCHUK'S ... Nd7-c5! GRISCHUK'S ... Nd7-c5! => PERFECT EXAMPLE

GC: YOU CANNOT GO FORWARD IF YOU CANNOT GO BACK; 13 Qb3xb7?? Nd7-c5! now b7-queen cannot go back to b3, gets TRAPPED GC: TRAP PIECES BY TAKING AWAY THEIR FLIGHT SQUARES Jobava vs Grishcuk FIDE World Cup 2009 13 Qb3xb7?? Nd7-c5! takes away b3-,a4-,a6-flight squares from White b7-queen

GC: TYOP: TRAPPING YOUR OWN PIECES: Kamsky vs Jobava Reggio Emilia 2010 34 ... d6-d5?? renders Black c5-rook immobile, 35 Nf4-e6

It's all about <FLIGHT SQUARES>, <MOBILITY>. Against Kamsky, Jobava *voluntarily* restricted the <MOBILITY> of his own Black c5-rook by playing 34 ... d6-d5??. Against Grischuk, Jobava overlooked that after 13 ♕b3xb7?? Grischuk could simply play 13 ... ♘d7-c5!, taking away the critical b3-,a4-,a6-<FLIGHT SQUARES> from the offside White b7-queen, including the b3-square from which the White queen went forward in the first place.

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Featured in the Following Game Collections[what is this?]
34 - d6-d5?? leaves Black c5-rook with nowhere to go, 35 Nf4-e6
from TRAPPED PIECES: LACK OF MOBILITY, NO RETREAT by notyetagm
34 ... d6-d5?? leaves the Black c5-rook with nowhere to run to
from TYOP: Trapping Your Own Pieces by notyetagm
A10 English: Great Snake [White]
by chess.master

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