Puzzle of the week #260

Chess Diagram: 

[Event "Puzzle #260"][Date "2014.10.07"][Result "1-0"]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

This game was played between 2 well known, strong international players of the time. Black came out of the opening ahead 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:

[Event "Puzzle #259"][Date "2014.09.28"][Result "1-0"]1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 Nf6 5.O-O Bc5 6.Nxe5 O-O 7.Nxc6 dxc6 8.e5 Ng4 9.c3 {Solution} 9...Qh4 10.h3 Nxf2 11.Rxf2 Qxf2+ 12.Kh1 Bg4 13.d4 (13.hxg4 Qh4#) (13.Qxg4 Qg1#) Bxd1 {Black wins}

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


Opening play (4)