Some people who I play always play the symmetrical variation, and I don't know how to play it for white.
[fen ""]
1.d4 d5 2.c4 c5
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I do not play d4, but it seems to me it will be either 3. e3 (safe) or 3. dxc5. If the later, then one variation might be 3... d4 4. Nf3 Nc6 5. e3 e5 and black has something for the pawn. So may be e3 is safer for white here. if you have database you can look at the GM games using this line and see what they do here. I think though this variation is not good for black, usually black plays Nf6 first. May be because white can actually take on c5 and hold on to it... have you tried that? again, a chess data base is your friend here ;) or check out chessgames.com.– NasserFeb 4, 2013 at 5:17
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You could actually play 4.cxd5 here. check it out.– NasserFeb 4, 2013 at 5:33
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2 Answers
It's really unknown, I've never seen it actually played except for maybe one or two internet blitz games out of ten thousand. But I've looked up some lines for you.
You play 3.cxd5 and now black needs to decide what to do.
The symmetrical 3...cxd4 4.Qxd4 followed by e4 just loses a pawn.
3...Qxd5 allows white to chase the queen, getting a lead in development:
[FEN ""]
1.d4 d5 2.c4 c5 3.cxd5 Qxd5 4.Nf3 cxd4 5.Nc3 Qa5 6.Nxd4
So black plays 3...Nf6. Now a thing like 4.Nf3 cxd4 5.Qxd4 Qxd5 stays completely symmetrical, but white can play 4.e4!.
Fundamental Chess Openings gives two lines, both a bit better for White because of better development:
[FEN ""]
1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Nxc5 6.Nf3 e6 7.Nc3 exd5 8.Qxd5
and
[FEN ""]
1.d4 d5 2.c4 c5 3.cxd5 Nf6 4.e4 Nxe4 5.dxc5 Qa5+ 6.Bd2 Nxd2 7.Qxd2 Qxc5 8.Na3
The symmetrical defense is my favorite, here is how games with me playing as black usually turn out:
[FEN ""]
1.d4 d5 2.c4 c5 3.dxc5 d4 4.Nf3 Nc6 5.e3 e5 6.exd4 exd4
This line of play of course requires white to play 3. dxc5: it is quite a common variation I find. White cannot defend the c5 pawn effectively and black has a clearly dominant position including a passed pawn. A word of caution: in this position development of your pieces is more important that material equality so if white chooses to defend the c5 pawn simply allow him and develop, building pressure elsewhere or even on the pawn itself.
