C49Black6 book lines continue
Spanish Variation, Symmetrical Variation, Metger Unpin
Four Knights Game1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bg5 Bxc3 8. bxc3 Qe7 9. Re1 Nd8
Also known as Four Knights: Symmetrical, Metger unpin, Four Knights Game: Symmetrical, Metger Unpin, Metger Unpin Variation, 4 Knights.