Have a look here,a game imported.
I think you will like it,that's a very good game (for what i think)
http://en.lichess.org/7Z0gUX7E#1i just can't get the 15 move:
Knight f7
Hi,
I am not a chess master, but 15 Kf7 serves a few purposes, which are all good for White :
* By threatening to take Black's queen, it forces Black to respond, which makes Black lose a tempo (you see that soon after, Black loses a tempo by moving back its king to g8).
* By moving its Knight away from e5, it prevents Black from capturing it on e5, which if it did with a pawn, would make White lose a tempo by threatening its bishop on f4.
* By placing White's king in f7, it makes it an easier target for White as it is closer to White's Queen and still on that white diagonal (accessible in D4). Putting your opponent's king in the center is often better for you if you still have a queen on the board.
I hope that helps.
Very precise,thanks a lot :)