chess tactics 002

This is my second chess tactics posting. I decided to give the position on the diagram below a comprehensive study.

1. d4 Nf6 2. c4 e6 3. Nc3 c6 4. e4 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e5 Qg6


White to move
The queen is threatening the pawn at g2. Should white bring out his light squared bishop?

8. Nf3 d5 9. Bd3 Qxg2? (9... Qg4? 10. h3 Qh5 (10... Qxg2 11. Rh2 Qxh2 12. Nxh2) 11. g4 dxc4 12. Bc2 Qg6 13. Bxg6) (9... Qh5 10. Qa4 Bxc3+ 11. bxc3 O-O) (9... f5 10. exf6 Qxf6) 10. Rg1 Qh3 11. Rxg7 Bf8 12. Rg3 Qh5 13. Ne2 dxc4 (13... f5 14. exf6 Rg8 15. Rxg8 Qxf3 16. Bg6+ Kd7 17. Rxf8 Kc7 18. Be8 e5 (18... Qh1+ 19. Kd2 Qxh2 20. f7 Qxf2 21. Qf1 Qh4 22. Rg8) 19. Ng3 Qf4 20. Qd2 Bh3 21. f7) 14. Nf4 Qxf3 15. Qxf3 {+-} *