The Catalan Opening: Closed is a chess opening classified under ECO code E01 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 e6 3. g3 d5 4. Bg2. The resulting position leaves black to move.
Resulting Position
1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2
rnbqkb1r/ppp2ppp/4pn2/3p4/2PP4/6P1/PP2PPBP/RNBQK1NR b KQkq - 1 4Resulting Position