Puzzle of the week #260

Level: 
3-Bishop
Chess Diagram: 

r-b-kb-r
-p---ppp
p-n---q-
--------
---B----
-----B--
PPPQ-P-P
--KR---R

Game: 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.exd5 Nxd5 5.Nf3 c5 6.Nxd5 Qxd5 7.Be3 cxd4 8.Nxd4 a6 9.Be2 Qxg2 10.Bf3 Qg6 11.Qd2 e5 12.O-O-O exd4 13.Bxd4 Nc6 (see diagram)
This game was between 2 well known and strong international players of the time. Black came out of the opening up a full piece. Your tasks:
a) What is the name of the opening?
b) Why did White give up the d4-Knight?
c) What should white do now?

Total available points for this puzzle is 20. The answers will be published next week together with puzzle #261.

Puzzle #259 solution:
Game: Rabinin – Grigorova, 1981. There was no perfect answer this time around! Most of you chose to move 10... Bxf2+ which is not as good as in the game.
a) Opening name: Ruy Lopez or Spanish
b) Solution:
9... Qh4 10. h3 Nxf2 11. Rxf2 Qxf2+ 12. Kh1 Bg4 13. Qxg4 ... (13. hxg4 Qh4#) 13... Qg1#

Correct solutions:
Yakov - 10 points
Daniel - 9 points
Jalen - 8 points
Brandon, Oliver, Hyson, Bradley - 7 points
Benjamin - 6 points
Anya - 5 points
Cody, Coco - 3 points
Aaron - 1 point

Comment: 

Opening play (4)