Chess Opening Theory/1. d4/1...d5/2. Nf3

A flexible developing move. While this move usually leads to a Queen's Gambit, it is also used to go into a Colle System—a solid line that prepares e2-e4 earlier and can be more aggressive than the usual lines.

Black can develop a number of ways though 2...Nf6 is most common.

Theory table
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'''1. d4 d5 2. Nf3'''