This pawn will become overextended, too far advanced to be supported by other pieces and easier to attack.

@jkarp - deflect, attack and develop simultaneously

If you take out a pawn in a pawn chain, the other pawns are affected negatively. Usually it refers to taking out the pawn at the base of the pawn chain though, instead of the one at the head.

They are Games from the gameknot database

5...exd6 is also fine.

I prefer 6...O-O-O first.

This queen move allows Black to weaken White's kingside and blocks in'White's DSB.

I agree with charleshiggie and l-d-j. 7.fxe5 was much better.

I see no need to give up the bishop pair now. I again prefer 7...O-O-O.

I agree that in this open position, bishops are better than knights. I played this with the following knight move in mind, which I think wins a pawn for black.

Such a lead in development, and all you go for is a single pawn. Better finsh your development, and gonfor mate!

*Always* do a safety check before making a move. That just prevented me from simply hanging a piece in one of my ongoing games.

@charleshiggie - of course check on c2 first!

I also agree with 10...Nxc2+

This is a good example of "If you see a good move, look for a better one." Many beginners would think "Oh goody, I can exchange queen and then win the exchange. In fact much better to take on c2 and then exchange queens."