411 REFERENCE · Wikibooks
Chess Opening Theory/1. e4/1...g5/2. g4
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Borg Defence rd nd bd qd kd bd nd rd pd pd pd pd pd pd pd pd pl pl pl pl pl pl pl pl rl nl bl ql kl bl nl rl 1.e4 g5?! g4 B00 King's Pawn Opening
Borg Defence: Symmetric Variation
ECO:B00
Symmetric Variation.