Grünfeld Defense: Counterthrust Variation

The Grünfeld Defense: Counterthrust Variation is a chess opening classified under ECO code E60 in the Indian Defences family, where Black responds to 1.d4 with 1...Nf6, including the Nimzo-Indian, Queen's Indian, and King's Indian. It is reached after 4 moves: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5. The resulting position leaves white to move.