ECO C05
3 named openings and variations are classified as C05. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- French Defense: Tarrasch Variation, Botvinnik VariationC051. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 b6
- French Defense: Tarrasch Variation, Closed VariationC051. e4 e6 2. d4 d5 3. Nd2 Nf6
- French Defense: Tarrasch Variation, Pawn Center VariationC051. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4