Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nf3/3...Nf6/4. Nc3/4...dxc4

= Slav accepted 4. ... dxc4 = Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4

Black finally takes the sacrificial pawn with dxc4. This move has about half the popularity of the main line e6. It threatens a pawn advance onto White's queenside. White usually plays 5. a4 to defend against 5 .. b5 which cements Black's hold on this side of the board and threatens a pawn advance onto White's queenside.

Theory table
1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4