Frankenstein-Dracula Variation
Vienna Game
1.e4 e5 2.Nc3 Nf6 3.Bc4 Nxe4 4.Qh5 Nd6 5.Bb3 Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 b6
A wild line where Black gives up the rook on a8 to trap White's knight in the corner.
Fun fact: The Irish correspondence player and theorist Tim Harding "extravagantly dubbed" this line the Frankenstein-Dracula Variation. Source
Practice this lineThe idea
After 3.Bc4 Nxe4 4.Qh5, White threatens Qxf7 mate. Black defends with 4...Nd6 5.Bb3 Nc6, and after 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 b6, White has won the rook on a8. But the knight on a8 is trapped, and Black hopes to win it back and use a big center and active pieces.
Plans for White
Try to rescue or sell the knight on a8 at the best price, and keep Black's king in the center. White is ahead in material, so trading pieces and calming the position helps.
Plans for Black
Aim to win the knight on a8, for example with ...Bb7, then use the center pawns and the open position. Black's king stays in the middle, so keep the pieces coordinated around it.
Watch out for
For Black, the wrong defence at move 4. After 4.Qh5, the natural-looking 4...Nf6?? attacks the queen but allows 5.Qxf7, checkmate.
For White, the knight on a8. It can be lost for nothing if White spends too long chasing more material while Black's pieces get active.
Mate on f7 (4...Nf6??)
4...Nf6 5.Qxf7#