Curtains vs PoG

[NajdorfDefense]

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2) One piece attacks rarely work - if you attack "with tempo" it should be to combine both getting one of your pieces to a better square or creating an additional threat while forcing your opponent to move one of his pieces to a bad square. Just because you move a piece and attack something does not mean the move is "with tempo".

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Correct, and Nb4 is not a 1-piece attack because it forces Curtains to move his Q to a worse square, allows us to develop Bf5 with tempo, and creates at least two additional threats, as well as slowing down his K-side development.

So, in short, Nb4 is 'with tempo.'

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As it stands, curtains plan is fairly obvious: likely ... e3, 0-0, Nc3,

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Right, so our plan with ...Bf5 prevents at least 2 of these moves as far as I can see, and we can take his fianchettoed bishop most likely if he insists on playin o-o anyway, thus lessening the pressure on our d5.