411 REFERENCE · Wikibooks
Chess Opening Theory/1. d4/1...Nf6/2. Bg5/2...Ne4/3. Bc1
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Queen's Pawn Game rd nd bd qd kd bd rd pd pd pd pd pd pd pd pd pl nd pl pl pl pl pl pl pl rl nl bl ql kl bl nl rl
Trompowsky Attack
Bc1 is a rarely seen retreat that undevelops the bishop and allows black to get easy play.
References
Trompowsky Attack