This is a rare move.
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. g1f3  3... d7d5  4. b1c3  4... f8b4 The Ragozin Defense is one of the most popular at the high level right now. 5. c4d5  5... e6d5  6. c1f4 A less popular move than the more natural development with 6.Bg5, but which also has its supporters at the highest level. Radjabov has played this system a few times. 6... e8g8  7. a1c1 