Well it seems that one option is you do the usual thing to get the pawn back: 5 e3 b5 6 b3 (or maybe throw in axb5 first) when both pawns should eventually fall.
Slav Question
Sort:
I play this:
Develop all your pieces to active squares. Exploit whites weak b4 as an outpost for your knight or bishop. Castle king side and have a nice game.
It's pretty much the main line. Lines where white gambits that pawn and allows black to play b5 are more or less dubious for white.
Oh and one more thing. If white does not play 3. Nf3 Nf6 you have this option too that equalizes immediately:
That's why white normally plays Nf3 first (and then Nc3 on the next move) to not allow the e5 break.
Elubas wrote:
Well it seems that one option is you do the usual thing to get the pawn back: 5 e3 b5 6 b3 (or maybe throw in axb5 first) when both pawns should eventually fall.
I think it is dubious to try to hold on to the pawn that way. Also, placing the bishop on d7 is nonsense in the slav. The whole point of playing the slav (or caro-kann for that matter) compared to the QGD (and french) is that you want that bishop outside your pawn chain on g4 or on f5. Right now he can't play it to f5 because of e4 ofc so he should play ...Nf6 first.
...Reb correct me if I'm wrong :-)
You're right, ...Bd7 is dubious, but I think the OP just wanted to know how to get the pawn back from there. Obviously 5 e4 is another option, both seem good.
Although nowadays people play the semi slav structure alot, which has different plans entirely to the early ...dxc4 slav with ...Bf5.
Funnily enough, a similar line actually caused me problems in a recent tournament game against a 2000 as white which went 1 d4 d5 2 c4 c6 3 Nf3 e6!? 4 Nc3 (4 e3 seems to avoid ...dxc4 lines with no drawback) dxc4 5 a4 Bb4 and I just really didn't want to play such a passive move to just break the pin with Bd2 and played 6 Ne5?! (intending Qf3), an interesting but I think dubious plan. In reality though, Bd2 is quite nice for white, as he can play b3 soon, and if black is really trying to hold the pawn he can try to capture with ...Bxc3, but then I have the bishop pair and I think the pawn can be won back anyway.
Elubas wrote:
You're right, ...Bd7 is dubious, but I think the OP just wanted to know how to get the pawn back from there Obviously 5 e4 is another option, both seem good.
Although nowadays people play the semi slav structure alot, which has different plans entirely to the early ...dxc4 slav with ...Bf5.
Well the answer to the OP is "you can't get it back without serious positional consessions".
From the looks of it he plays the slav i showed in post #3 but he does it wrong because he doesn't plan to get the bishop to f5 and I don't think you play dxc4 that early in the semi-slav (not 100% sure about this though).
Reb's line does seem to get the pawn back with no positional concessions.
Elubas wrote:
Reb's line does seem to get the pawn back with no positional concessions.
Reb's line might be wrong :-)
Its nice to see such a strong player ( Gonnosuke ) promoting a line that is both sharp and sound ( noteboom ) as opposed to some of his other questionable pets ! ( halloween gambit !? ) I believe there may be hope for him yet. 
Well my computer liked Bd2, and it also according to fritz database was played most by strong GM's. But in any case from now on I'm playing 4 e3 (this is after 3 Nf3 though, not 3 Nc3) because I would prefer to avoid having to face ...dxc4 altogether and why not.
Anyway, what's wrong with getting a draw with Kasparov?
What do you play if your opponent tries to hang onto the pawn?