Neo-Grünfeld Defense: Classical Variation

The Neo-Grünfeld Defense: Classical Variation is a chess opening classified under ECO code D77 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 6 moves: 1. d4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d5 6. c4. The resulting position leaves black to move.