1.e3

Trying to open diagonals as soon as possible for a raid of the white queen: the threat is 2.Qh5 g6 3.Qd5 followed by Qxd7 or Qxf7, so there are only few possible replies for black.

Black can keep symmetry with 1...e6 or try 1...Nf6.

The defense 1...d6 seems to lead to white being a pawn up without compensation, but things are still complicated.

The move 1...f5 is tricky.

The move 1...g6 is dubious: 2.Qf3 Nf6 3.Nc3 c6 or 3.Bd3 d5 4.Bxg6 Bf5.