French Defense: Winawer Variation, Fingerslip Variation, Schwarz's Line

The French Defense: Winawer Variation, Fingerslip Variation, Schwarz's Line is a chess opening classified under ECO code C15 in the Open Games & French Defense family, beginning with 1.e4 e5 or 1.e4 e6, including the Italian Game, Ruy Lopez, and French Defense. It is reached after 5 moves: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Bd2 Ne7 5. Nb1. The resulting position leaves black to move.