Where does he get this stuff??

I looked at Bill Wall's 10th move in this game and just shook my head. Where does he get this stuff? A "Theoretical Novelty", Black immediately makes an error, and the game is effectively over...


Wall,B - Guest215111
playchess.com, 2012


1.e4 e5 2.Nf3 Nc6 3.Bc4 h6 

The Semi-Italian Opening.


4.0-0 Nf6 5.Nc3 Bc5 6.Bxf7+ 

The Semi-Italian Four Knights Jerome Gambit.


6...Kxf7 7.Nxe5+ Nxe5 8.d4 Bd6 9.dxe5 Bxe5 10.Nd5 

Apparently an improvement on 10.f4, which I have played in a few games previously: perrypawnpusher-KnightRoyal, blitz, FICS, 2010 (1-0, 21); perrypawnpusher - drandika, blitz, FICS, 2010 (½-½, 31); and perrypawnpusher - grunf, blitz, FICS, 2010 (1-0, 15). 


10...Nxd5? 


The right response was 10...Bd6. 


Curiously enough, Bill once faced 10...h5 11.f4 Bd4+ 12.Qxd4 c5 13.Qxc5 d6 14.Qb5 Nxe4 15.Qc4 Nf6 16.Nxf6+ Kxf6 17.Be3 d5 18.Bd4+ Kf7 19.Qd3 Re8 20.Qh7 Rg8 21.Qxh5+ Kf8 22.Bc5+  in Wall,B - Mol,E, Chess.com, 2010. 


11.Qxd5+ Kf6? 


Trying to hold onto the Bishop compounds Black's problems. 


12.f4 Kg6 13.fxe5 Kh7 

This castling-by-hand does not bring safety, as White's lead in development is too great..


14.Rf7 Qh4 15.Be3 Re8 16.e6 dxe6 17.Qe5 Rg8 

18.Bd4 Qg4 19.Rxc7 b6 20.Rf1 Ba6 21.Rff7 

Black now has a series of checks on White's King, but it does not change the out come of the game.


21...Qd1+ 22.Kf2 Qd2+ 23.Kf3 Be2+ 24.Kg3 Qg5+ 25.Kf2 Qxe5 26.Bxe5 Black resigned