ECO D77
3 named openings and variations are classified as D77. ECO (Encyclopaedia of Chess Openings) codes group openings from A00 to E99 by their opening moves.
- Neo-Grünfeld Defense: Classical VariationD771. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4
- Neo-Grünfeld Defense: Classical Variation, Modern DefenseD771. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 dxc4
- Neo-Grünfeld Defense: Classical Variation, Polgar VariationD771. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4 Nc6