ECO C01
4 named openings and variations are classified as C01. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- French Defense: Exchange VariationC011. e4 e6 2. d4 d5 3. exd5
- French Defense: Exchange Variation, Bogoljubow VariationC011. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bg5 Nc6
- French Defense: Exchange Variation, Monte Carlo VariationC011. e4 e6 2. d4 d5 3. exd5 exd5 4. c4
- French Defense: Exchange Variation, Svenonius VariationC011. e4 e6 2. d4 d5 3. Nc3 Nf6 4. exd5 exd5 5. Bg5