King's Indian Defense: Fianchetto Variation, Debrecen Defense

The King's Indian Defense: Fianchetto Variation, Debrecen Defense is a chess opening classified under ECO code E67 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 6 moves: 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 Nbd7. The resulting position leaves white to move.