user-1: So, I was playing this line of the exchange variation of the Grunfeld: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. Be3 Nc6.
[Fen "r1bq1rk1/pp2ppbp/2n3p1/2p5/2BPP3/2P1B3/P3NPPP/R2QK2R w KQ - 0 10"]

In my computer's opening book, the only recommended move for White is 10. O-O.
However, I want to know whether 10. dxc5 is playable?

user4362: According to http://chessok.com/?page_id=352 this has been played five times (by weaker players) and gives black a very slight advantage (-0.11) after 10…Qc7.
So, depending on you level this is certainly playable. If you analyse it a bit you might even have practical chances to achieve an opening advantage. But probably black will just win back the pawn and you'll have to be careful not to just be left with your worse structure.

user3480: The problem with this line is that this is exactly what Black is hoping for.
You give the center to "win a pawn", but Black has several compensation : first of all the black bishop on ...Bg7 is now very strong. Also with ...Qc7 follow by ...Rd8 black will win the d-file. If Black want then they can easily win back the pawn by the following plan : ...e5, ...Bf8 and ...Bxc5.

-1: <p>So, I was playing this line of the exchange variation of the Grunfeld: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. Be3 Nc6.</p>

<pre><code>[Fen "r1bq1rk1/pp2ppbp/2n3p1/2p5/2BPP3/2P1B3/P3NPPP/R2QK2R w KQ - 0 10"]
</code></pre>

<p>In my computer's opening book, the only recommended move for White is 10. O-O.</p>

<p>However, I want to know whether 10. dxc5 is playable?</p>
 4362: <p>According to <a href="http://chessok.com/?page_id=352" rel="nofollow">http://chessok.com/?page_id=352</a> this has been played five times (by weaker players) and gives black a very slight advantage (-0.11) after 10…Qc7.</p>

<p>So, depending on you level this is certainly playable. If you analyse it a bit you might even have practical chances to achieve an opening advantage. But probably black will just win back the pawn and you'll have to be careful not to just be left with your worse structure.</p>
 3480: <p>The problem with this line is that this is exactly what Black is hoping for.</p>

<p>You give the center to "win a pawn", but Black has several compensation : first of all the black bishop on ...Bg7 is now very strong. Also with ...Qc7 follow by ...Rd8 black will win the d-file. If Black want then they can easily win back the pawn by the following plan : ...e5, ...Bf8 and ...Bxc5.</p>
