The Nimzo-Indian Defense is a chess opening classified under ECO code E20 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 3 moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4. The resulting position leaves white to move.
Resulting Position
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4
rnbqk2r/pppp1ppp/4pn2/8/1bPP4/2N5/PP2PPPP/R1BQKBNR w KQkq - 2 4Resulting Position