Last week, I discussed something with my friend about QGD: Exchange Variation. She thought that black's dark-square bishop should be set at d6, so don't want to play 5. ..Be7. I said OK, but now you should play c6. So there are some moves, after 10. .. gxf6, we found that in the position white has an idea to move the knight into h4.
It seems black doesn't need to worry about this knight would take the bishop at g6, because of the double pawn in f-file. But after 13.Kd2, white is ready to move the bishop to d3 to have a pressure to g6. If black exchange the bishop, white's knight in h4 can invade f5 square easily.
I think this idea is uncommon and interesting, and there is something unclear in this position. So I want to share it in the forum.
