The delicate position, coming from out of nowhere. White is offering the pawn on e4 and is looking to then sac on e6, gaining attacking tempo.... but is this sound?
11... Bb7xe4
According to Fritz, taking was good for Black, and although White can take on e6, Black shouldn't panic and simply develop the sleeping Knight on b8
12. Bb3xe6
There is no need to take this Bishop.... Nc6 here and Fritz scores Black at -1.01
12... fxe6
? But taking here actually swings the point around in White's favour
13. Nd4xe6 Qd8d7 14. Ne6xg7 Ke8f7
Here, Fritz suggests f4-f5 is best for White and scores the game at 2.87
15. Qd1d4
? However Qd4 is a mistake... saccing with Bxg2+ is now the best move for Black, as then Nc6 can be played, hitting the Queen thus forcing her away from protecting the knight on g7
15... d5
This was missed by both players, instead Black feebly tries to defend the position
16. f5
This becomes futile, Black is losing lots of material and later tries for a swindle, with no joy