Chess Opening Theory/1. d4/1...d5/2. c4/2...c6/3. Nf3/3...Nf6/4. cxd5

= Slav Defence Exchange Variation =

4. cxd5
After this move, the tension in the center is relieved, often allowing black equality. Because of this, this variation often ends in a draw.

Black's only decent move is to complete the exchange of pawns with 4...cxd5. After the exchange, black will find it difficult to win unless white is overly ambitious.

End in the D14 exchange symmetrical is the same : the draw. Blacks and whites developing their pieces in the same way, exchanging them one after another.

Theory table
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'''1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. cxd5 cxd5'''