Puzzle of the week #255

Level: 
2-Knight
Chess Diagram: 

[Event "Puzzle #255"][Date "2014.05.16"][Result "?-?"][SetUp "1"][FEN "8/8/8/8/1K1Q4/7p/8/7k w - - 0 1"]

After a long fight two strong players reached this endgame. Your tasks:
a) What do you know about it?
b) What is the result if White moves first? Show a line
c) What is the result if Black moves first? Show a line
d) Did it matter who moves first? If yes, why?

Total available points for this puzzle is 20. The answers will be published next week together with puzzle #256.

Puzzle #254 solution:
Huemmer – Hoffmann, Germany 2002. Our answers:
a) Philidor’s Defence - by all
b) He has moved his bishop to e7 - Jalen

[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 {Solution} ({If} 8...Nb6 9.dxe5 dxe5 10.Bg6) 9.Ne6+ Kxf7 10.Ng5+ Kg6 11.Qf7+ Kh6 12.Ne6+ g5 13.Bxg5# {Jalen, Hyson, Bradley}

Correct solutions:
Jalen, Hyson, Bradley - 15 points
Anya, Toro - 12 points
Benjamin, Brandon, Oliver, Aaron - 10 points
Coco - 8 points
Cody - 7 points

Standings:
Bradley - 66 points
Benjamin, Brandon, Oliver - 57 points
Hyson - 55 points
Jalen - 54 points
Toro - 52 points
Coco - 50 points
Anya - 47 points
Cody - 43 points
Aaron - 42 points
Daniel - 25 points
Mrinal - 5 points

Comment: 

Basic endgames: Q vs P