!? Typical is either g3 and Bg2 or Be3 and Qd2. I am not familiar with this plan.
5... d6 6. Bf1e2 Ng8f6 7. O-O O-O 8. Nf3g5
?! Waste of a move.
8... h6 9. Ng5f3 a6
I don't have much experience with the Black side of the Closed Sic. but I do know that from the White side I don't like it when Black plans a queenside expansion. So I decided to grab some q-side space.
10. b3 b5 11. a4 b4
!? Controlling the c3 square!
12. Nc3d5
? Losing the material.
12... Nf6xd5
Opening up the long diagonal for the Bishop. and thus losing the knight.
13. Ra1b1 Nd5c3
Now that Black is up he can force an exchange of Knight for Bishop and leaving a piece controlling the c3 square and the diagonal on e3, d3, c3.
14. Bd2xc3 Bg7xc3 15. Nf3h4 e5
Trapping my own bishop, but attacking the offsides knight.