1. Main line 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 Choose a line 1. Main line 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 2. Paulsen Variation 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7 Close 1. Main line 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 2. Paulsen Variation 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 exd4 5. O-O Ne7 Next