A40
Borg Defense: Borg Gambit
1. d4 g5
The Borg Defense: Borg Gambit is a chess opening classified under ECO code A40. It is reached after the moves 1. d4 g5.
It belongs to the Borg Defense family — one of many ways the line can branch. Understanding the parent system’s plans is the fastest way to play this variation well.
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