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Checks let you reposition defenders for free
Compiled by notyetagm
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If anyone thinks that this tactical theme <USING CHECKS TO REPOSITION YOUR PIECES WITH GAIN OF TIME TO MEET THREATS>. is too obvious or trivial, note that Topalov has overlooked it not once but -twice- this year.

In his game against Svidler at Corus, Topalov (Black) missed the defensive repositioning of the White queen via the manoeuvre ♕g3-b8+!, ♕b8-b4.

And then at Linares against Carlsen, Topalov (Black) resigned in a drawn position(!) because he failed to see the defensive manoeuvre ... ♕d7-d5+, ... e6-e5, ... ♕d5-g8 to meet the threat of a White queen invasion to h8.

The lesson to be learned from both of these Topalov oversights is that a piece may be repositioned with <GAIN OF TIME> by <CHECKING> the exposed enemy king (♕g3-b8+!, ... ♕d7-d5+) to meet a threat that otherwise seems either impossible or very awkward to meet.

7 Bf1-b5+, 8 Bb5-a4 allow White bishop to defend the c2-square
Krasenkow vs S Kindermann, 2001 
(A04) Reti Opening, 23 moves, 1-0

34 Qg3-b8+!, 35 Qb8-b4 allow White queen to defend q-side
Svidler vs Topalov, 2007 
(B90) Sicilian, Najdorf, 48 moves, 1-0

64 ... Qd7-d5+, preparing ... Qd5-g8, would have drawn
Carlsen vs Topalov, 2007 
(D45) Queen's Gambit Declined Semi-Slav, 64 moves, 1-0

Kasparov vs I Sokolov, 1999 
(D10) Queen's Gambit Declined Slav, 49 moves, 1-0

63.Rb5+ Kg4 64.Ra5 tempo so White b7-rook gets behind a7-passer
Svidler vs Sutovsky, 2007 
(C80) Ruy Lopez, Open, 62 moves, 1-0

34 Qd6-d7+ gains a tempo to defend g2-square with 35 Qd7-g4
Eljanov vs Radjabov, 2008 
(E77) King's Indian, 33 moves, 0-1

13 ... Qd8-a5+! tempo to play 14 ... Qa5-f5 defending h7-square
P Charbonneau vs H A Hussein Al-Ali, 2008 
(C10) French, 13 moves, 0-1

7 games

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