Carlsen called this defense \"The Berlin against 1.d4,\" a very interesting view. It's a solid line whose main variations leads to an endgame that is hard to break. Every now and then, however, the Berlin and its associates are defeated.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... c7c5  5. c4d5 