Home › Openings › Three Knights Opening Three Knights Opening: Winawer Defense ECO C46 · 1. e4 e5 2. Nf3 Nc6 3. Nc3 f5 Related variationsThree Knights Opening: Steinitz DefenseThree Knights Opening: Schlechter VariationThree Knights Opening: Steinitz-Rosenthal Variation Practice this opening · Play against the computer