Home › Openings › English Opening › English Opening: Symmetrical Variation › English Opening: Symmetrical Variation, Four Knights Variation English Opening: Symmetrical Variation, Four Knights Variation, Keres-Parma System ECO A35 · 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 e6 Practice this opening · Play against the computer