Morozevich brought this line into the spotlight a few years back, and ever since it has become a favorite of the Indian GM Harikrishna and the German GM Bleubaum to name a few.
1. e2e4  1... e7e6  2. d2d4  2... d7d5  3. b1c3  3... d5e4  4. c3e4  4... g8f6  5. c1g5  5... f8e7  6. g5f6 