Chess Opening Theory/1. e4/1...e5/2. Nc3/2...Nf6/3. f4/3...d5/4. fxe5/4...Nxe4/5. d3/5...Qh4

=Vienna Game, Würzburger Trap= White must block the check with '''6. g3'''. Black can then take advantage of White's pinned h-pawn and play 6...Nxg3. The next moves are almost forced: '''7. Nf3 Qh5 8. Nxd5'''.

If Black takes the rook with 8...Nxh1, they effectively trade rooks after 9. Nxc7+ Kd1 10. Nxa8 and the game is equal. Note that 8...Na6?? to prevent 9. Nxc7+ loses a piece after 9. Nf4 Qh6 10. Ne2.

Alternatively, Black may play 8...Bg4, preparing a battery against White's Queen.

Theory table
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1. e4 e5 2. Nc3 Nf6 3. f4 d5 4. fxe5 Nxe4 5. d3 Qh4+