About this opening
English Opening: Anglo-Indian Defense, Nimzo-English is an opening in the Encyclopedia of Chess Openings,
classified under code A17. ECO group A (A00–A99)
covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached
after 6 half-moves from the
starting position, with the move sequence 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4.
It belongs to the English Opening family.
Within that family this is a level-2 branch (the Anglo-Indian Defense → Nimzo-English line). The immediate parent line is English Opening: Anglo-Indian Defense, transitioned via 3…Bb4.
The opening sequence in prose form: 1.c4 Nf6, 2.Nc3 e6, 3.Nf3 Bb4. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.