That Darned Berlin Defense

I've recently come to admire the black defense after 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 4. d4 exd4 5. Nxd4 Bd7, inviting white to double the c pawns via N or Bxc6 bxc6, opening the b file for black as well as the attacking options against the white kingside. I had always avoided playing these kinds of defenses because I thought the doubled c pawns were too weak for black, and I also prefer to keep a pawn on e5 for as long as possible. However, after experimenting with b-pawn sacrifices early on in my white repertoire I find that doubling the c pawns isn't as bad as I thought.

Here is a series of two games in which my opponent was white and both times insisted on attacking the center as quickly as possible, with 0-0, Rf1-e1, e4-e5, etc... however, in the first game I discovered a fundamental weakness in white's position, the h2 and f2 pawns are extremely vulnerable. Enjoy.