C48Black2 book lines continue
Spanish Variation, Rubinstein Variation
Four Knights Game1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Be2 Nxf3+ 6. Bxf3 Bc5 7. O-O O-O 8. d3 d6
Also known as Four Knights: Rubinstein, 5.Be2, Four Knights Game: Rubinstein Countergambit, 5. Be2.