Puzzle of the week #254

Chess Diagram: 

[Event "Puzzle #254"][Date "2014.05.05"][Result "1-0"]1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.c3 c6 5.Bc4 Be7 6.Qb3 Ngf6 7.Bxf7+ Kf8 8.Ng5 Qb6

Replay the opening moves available. Your tasks:
a) Name the opening
b) What has Black done wrong so far?
c) White to move and win
d) What would have you done if black chose to move 8... Nb6 instead?

Total available points for this puzzle is 20. The answers will be published next week together with puzzle #255.

Puzzle #253 solution:
Game: unknown players. One of the best answers was prepared by Benjamin:
a) The opening is Philidor defence
b) Ng5 ... causes attacking the f7-weak spot
c) White stands better because it is attacking the f7-weak spot compared to black which is not

d) Solution:

[Event "Puzzle #253"][Date "2014.04.28"][Result "1-0"]1.e4 e5 2.Nf3 d6 3.d4 Nd7 4.Bc4 Ngf6 5.dxe5 Nxe5 6.Nxe5 dxe5 {Solution} 7.Bxf7+ Kxf7 (7...Ke7 8.Qxd8+ Kxd8 {Black can't castle anymore}) 8.Qxd8 Bb4+ 9.Qd2 Bxd2+ 10.Nxd2 {White is up a pawn}

Correct solutions:
Benjamin, Jalen, Aaron, Toro, Bradley - 20 points
Hyson, Brandon, Oliver, Cody, Coco, Anya - 15 points
Daniel - 5 points

Oliver - 12 points for puzzle #252

Bradley - 51 points
Benjamin, Brandon, Oliver - 47 points
Coco - 42 points
Toro, Hyson - 40 points
Jalen - 39 points
Cody - 36 points
Anya - 35 points
Aaron - 32 points
Daniel - 25 points
Mrinal - 5 points


Philidor defence