Postponing castling for the time being. That is the most unpleasant strategy for Black, who seems to lack many useful moves.
1. e2e4  1... c7c5  2. g1f3  2... e7e6  3. b2b3 A nice side-line to avoid the heavy theory. 3... b7b6 This is considered to be one of the most plausible replies for Black. The reason: White does not seem to have a convenient way to defend his e4-pawn after the coming Bc8-b7 development. 4. c1b2  4... c8b7  5. b1c3 More or less forced, but now the knight blocks his own bishop. 5... g8f6  6. e4e5  6... f6e4  7. c3e4  7... b7e4  8. d1e2  8... e4b7 Andreikin achieved what he wanted: he locked the long diagonal, but at the expense of a few tempi. Giri's next move is a novelty. 9. h2h4 An idea borrowed from the French defense. Even though the black pawn is on the d7 rather than the d5-square, the kingside attack plan remains White's primary idea. 9... b8c6 