French Defense: Winawer Variation, Bogoljubow Variation

An entry in the Encyclopedia of Chess Openings (ECO C17), reached after 9 half-moves: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2.

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5…Ne7 1 line
- C17 Icelandic Defense

About this opening

French Defense: Winawer Variation, Bogoljubow Variation is an opening in the Encyclopedia of Chess Openings, classified under code C17. ECO group C (C00–C99) covers open games (1.e4 e5) and the French Defence, including the Ruy Lopez, Italian, Scotch and King's Gambit. This particular variation is reached after 9 half-moves from the starting position, with the move sequence 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. Bd2.

It belongs to the French Defense family. Within that family this is a level-2 branch (the Winawer Variation → Bogoljubow Variation line). The immediate parent line is French Defense: Winawer Variation, transitioned via 5.Bd2.

The opening sequence in prose form: 1.e4 e6, 2.d4 d5, 3.Nc3 Bb4, 4.e5 c5, 5.Bd2. From this position exactly one named continuation is recorded in the encyclopaedia.