The opening

This starts from the Italian opening:

  1. e4 e5
  2. Nf3 Nc6
  3. Bc4

Then if black does soemthing like d6 and goes for a pin of the knight:

  1. ...d6
  2. Nc3 Bg4

Once the knight is pinned then you can try for the Legal's Mate by gambiting your queen

  1. Nxe5 Bxd1
  2. Bxf7+ Ke7
  3. Ne5#

But if black doesn't take the queen right away it's bad for white

  1. Nxe5 Nxe5

Then the bishop is defended and the queen still falls

But white can first try to kick the bishop out

  1. h2 Bh5
  2. Nxe5 Bxd1
  3. Bxf7+ Ke7
  4. Ne5#

Legal's Mate for black

>