After this move, the tension in the center is relieved often allowing black equality due to the symmetrical position. Because of this, this variation often ends in a draw.

Black's only good move is to complete the exchange of pawns with 3...cxd5, and accept a symmetrical position. However, Nf6!? might be interesting as the position transposes to QGD, Marshall defence, Tan Gambit although this is rarely seen in high-level games. 3...Qxd5?! should be avoided as 4.Nc3 gains a lot of tempo, and allows white a crushing spacial advantage in the center.

After 3... cxd5, either side will find it difficult to win unless the other is over-ambitious.

For explanation of theory tables, see theory table and for notation, see algebraic notation..

1. d4 d5 2. c4 c6

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• Kasparov, Garry, & Keene, Raymond 1989 Batsford chess openings 2. ISBN 0-8050-3409-9.