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Saturday, August 27, 2011

Inverted Opening

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1. d4 e6 2. c3 d5 3. Bf4 Nf6 4. e3 c5 {Here it is Black who is playing the
Queen's Gambit, while White is building up his position according to the
pattern which Black uses in the Semi-Slav Defence, to which the move Bf4 is a
useful addition. This is an example of a so-called inverted opening, in which
White plays Black's system with a tempo in hand.} 5. Bd3 Nc6 6. Nd2 Be7
{Black has obviously lost his bearings and is not aware that he is 'really
White'; passive moves of this type do not fit in with the active position of

his central pawns.} ({Correct was} 6... Bd6 {.}) 7. Ngf3 O-O 8. Ne5  Re8
{Black does not appreciate the real nature of the position and is not taking
measures to obtain counterplay at the right time by means of an outpost on one
of the central squares. He even surrenders control of the important e4 and e5
squares to White, and as a result suddenly comes up against the storm of an
attack on his castled king.} ({The correct course was} 8... cxd4 9. exd4 Nxe5
10. dxe5 Nd7 11. Qh5 f5 12. -- ({when Black cannot meet} 12. f3 {by} Qc7) {
and} 12... Nc5 13. Bc2 Ne4 }) 9. g4 {Throughout the opening stage of the
game the conditions required to justify a 'bayonet attack' have been gradually
accumulating. One group of these conditions has already been noted in the
shape of Black's inferior moves and his lack of concern to control at least
one of the important squares e5 and e4. The other group can be revealed by an
analysis of the structure of White's position. This is clearly distinguished
by good piece play together with a modest but sound pawn formation in the
centre. Indeed, its essence lies in the very soundness of the formation c3, d4,
and e3, with the strong protection which it gives to the square d4. If this
solidity in the centre did not exist, Black would be able at the last moment
to organize a counterattack in the centre as an answer to White's attack on
his castled king.    His security against such a central counterattack -
generally the main weapon in an active defence against an attack on the
castled king - gives White great freedom in his attack on the castled position
and is basically the main justification for the move 9 g4!.} Nxe5 ({If} 9...
Nd7 {White will continue with} 10. g5 {as in the game.}) 10. dxe5 Nd7 11. g5 
Nf8 ({If} 11... Bxg5 {, then} 12. Qh5 h6 13. Rg1 Bxf4 14. exf4 Kf8 15. Qg4 g6
16. Bxg6 {.}) ({If} 11... Qc7 {, then} 12. Bxh7+ Kxh7 13. Qh5+ Kg8 14. g6 fxg6
15. Qxg6 Rd8 ({or} 15... Rf8 16. Qxe6+ Rf7 17. Qxf7+ {and 18 e6+}) 16. Rg1 Bf8
17. Nf3 {followed by Ng5.}) 12. h4 Bd7 13. Qg4 Bc6 14. O-O-O b5 {This
simplifies White's task, though better moves would not help Black very much.}
15. h5 c4 16. Bxh7+  {No sooner has White's pawn avalanche established
itself on the fifth rank than he carries out the characteristic piece
sacrifice, which breaks up the castled position and prevents a defensive
blockade from being set up.} Nxh7 17. g6 Ng5 18. Ne4  Nxe4 19. gxf7+ Kxf7 20.
Qg6+ Kf8 ({His position also collapses after} 20... Kg8 21. h6 Bf8 22. Rdg1 Re7
23. Qh7+ (23. hxg7 {John Nunn:} Bxg7 24. Rh7 Qc7 25. Rgh1 {followed by mate.})
23... Kxh7 ({or} 23... Kf7 24. hxg7) 24. hxg7+ Kg8 25. Rh8+ Kf7 26. g8=Q+ {,
etc.  (Footnote: John Nunn  In fact, White ends up material down after} Ke8 27.
Qxf8+ Kd7 {, etc., so he should prefer 23 hxg7...followed by mate.)}) 21. h6
Bf6 22. hxg7+ Bxg7 23. Rh8+ Bxh8 24. Bh6+ Ke7 25. Qh7+ {and mate next move.}