About this opening
Old Indian Defense: Aged Gibbon Gambit is an opening in the Encyclopedia of Chess Openings,
classified under code A53. ECO group A (A00–A99)
covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached
after 5 half-moves from the
starting position, with the move sequence 1. d4 Nf6 2. c4 d6 3. g4.
It belongs to the Old Indian Defense family. Within that family this is a sub-variation (the Aged Gibbon Gambit line).
The opening sequence in prose form: 1.d4 Nf6, 2.c4 d6, 3.g4. 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.