Home › Openings › Three Knights Opening Three Knights Opening: Steinitz-Rosenthal Variation ECO C46 · 1. e4 e5 2. Nf3 Nc6 3. Nc3 g6 4. d4 exd4 5. Nd5 Related variationsThree Knights Opening: Steinitz DefenseThree Knights Opening: Winawer DefenseThree Knights Opening: Schlechter Variation Practice this opening · Play against the computer