Alternatively, the game might play like this:
1. d4 Nf6
2. c4 c5
3. d5 e6
4. d6!!????
How to respond to 3. d6!!???
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Third example:Qb6 wins the pawn.
1. d4 c5
2. d5 e6
3. d6!!?????????
How do I respond to this? It looks like such a crazy move and I'm sure that there must be something I can do to exploit white's overextended pawns, but in practice, I'm rarely successful in turning this into a win, playing as black. Thoughts?