ECO D60
3 named openings and variations are classified as D60. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Queen's Gambit Declined: Orthodox DefenseD601. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7
- Queen's Gambit Declined: Orthodox Defense, Botvinnik VariationD601. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Bd3
- Queen's Gambit Declined: Orthodox Defense, Rauzer VariationD601. d4 d5 2. Nf3 Nf6 3. c4 e6 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 7. Qb3