1. Main line 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 Choose a line 1. Main line 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 2. Lichtenhein Defense 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 d5 Close 1. Main line 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 2. Lichtenhein Defense 1. e4 e5 2. Nf3 Nf6 3. Bc4 Nxe4 4. Nc3 d5 Next