the most principled choice, I play this myself against the English
2. g3 d5
This of course is a very sharp move, its not as bad as it looks. Of course it gives up a central pawn for a flank pawn, but black has ideas of keeping his queen active in the centre, for after cxd4, ...Qxd4, Nc3 and ...Qa5, black can pressure the knight with ....Bb4
3. cxd5 Ng8f6
it reaches the so called 'reversed dragon', by transposition
4. Bf1g2 Nf6xd5 5. Ng1f3 Bc8e6
this simply gives up the e pawn, ..Nc6 was he move
6. Nf3xe5 Bf8d6 7. Ne5f3
I always like it when my opponents bishops are placed on the d file facing a fianchettoed kings position, its granite for sure
7... Nb8d7 8. e4 Nd5b6 9. O-O O-O 10. d4
central domination with the classical pawn duo, unopposed
10... Be6g4
the pin appears to me to be ineffectual as there is no real way for black to exploit the pin
11. h3 Bg4h5 12. Nb1c3 f5
wow a radical attempt to attack the centre, the a2-g8 diagonal is now weakened as a consequence though, perhaps ...c5 would have been better, trying to fight for control of the dark squares, if the d pawn advances, black gets c5 and e5 for his pieces
13. e5 Bd6e7 14. Rf1e1 Be7b4
again there appears no real way black can exploit the pin and of course the weakness of the diagonal a2-g8 is now apparent and the bishop will be lost
15. Qd1b3 Bh5f7
although the bishop can be taken it looks, 'trappy', for the white queen, after ...a5