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Van Geet Opening: Twyble Attack is a chess opening that arises after 1.Nc3 c5 2.Rb1. It is classified A00 in the ECO system, and the position after these moves has black to move.
This line is a variation within the Van Geet Opening family. The strategic ideas above describe the family as a whole; this particular line reaches them by the move order 1.Nc3 c5 2.Rb1.