Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nc3/3...dxc4

3...dxc4
This move captures the gambit pawn. Since the Nc3 is exposed to attacks by the b-pawn, black can often safely overextend with moves like a6 and b5 to hold to the c-pawn in this line. This move is lesser seen than the main line 3. Nf6. There is a trap following the moves 4.e3 b5, where the move 5. Nxb5?, trying to exploit the h1-a8 diagonal is a mistake which gives black the advantage. This will be examined later.