Stigma wrote on 06/14/18 at 00:58:58:
I like this approach, though 3.c3 is still a bit annoying.
If you are happy with a line against the Torre, London or Colle that has .. c5 in it somewhere, it isn't a problem. One other point is that the move order avoids the sequence 1. d4 Nf6 2. Nf3 g6 3. Nc3 and you have a dilemma that if you continue on Kings Indian lines with 3. .. d6 or 3. .. g6 you could get move-ordered into a Pirc by 4. e4 . Otherwise you have to play 3. .. d5 which again may be not something you play from choice.
Another idea is to play 1. d4 Nf6 2. Nf3 b6. If then they play 3. g3, you can play 3. .. g6 or continue into a Queens Indian. There's no pin, so 3. Bg5 could be met with 3. .. Ne4. Unlike the Tromp, f3 evicting the Knight isn't possible.
Possible middlegames would be a reverse Reti, a structure with Nf6, g6, Bg7, 0-0, d6, c5, b6, Bb7, Nbd7. As an alternative a Hedgehog with Nf6, e6, Be7, 0-0, d6, c5, b6, a6, Bb7, Nbd7.