Quick Win

GOT back to winning ways today with a short but sweet win in round four of the 50+ Seniors at the British Chess Championships in Hull.
The game was effectively over in well under 20 moves, although my opponent played on to the bitter end.
Spanton (1927) - David W Stephenson (1817)
1.d4 e6 2.Nf3 f5
The first time this position has been on the board in one of my games.
3.Bf4
This London System approach has been played by Topalov, Tal, Petrosian and Nimzowitsch.
3...Nf6 4.Nc3?!
Overwhelmingly most popular is 4.e3.
The text switches the game into what is sometimes called a Barry Attack, at least when played against the King's Indian Defence. The combination of Nc3 with Bf4 is a sort of cross between a London (Bf4 with the queen's knight usually going to d2) and a Veresov (Nc3 and Bg5).
4...d6?!
It looks tempting to play this as ...e5 would (eventually) come with tempo. But I felt it was too early to decide whether Black's d pawn belonged on d6 or d5.
Best in the postmortem seemed to be 4...Bb4 with ...Ne4 to come. White can hardly claim an advantage after this.
5.Qd3!?
Seeking to enforce e4, which Black can only prevent with 5...d5. If that is the best move, and my analysis engines quite like it, then Black's fourth was a mistake.
5...b6?
After this, Black is close to being positionally lost.
6.e4 fxe4
On 6...Ba6 I intended 7.Qe3, and if 7...Ng4, then 8.Qd2 with a good game.
7.Nxe4 Nd5
Black is well behind in development, but this move does not make the situation worse as White is obliged to move his dark-square bishop. Nevertheless it is hard to believe Black should have done anything other than got on with bringing out his minor pieces.
8.Bg3 Be7 9.c3 0-0 10.0-0-0 a5 11.h4 c5?
Stockfish9 gives 11...h6, but reckons Black has the upper hand. Komodo9 gives the same move, and has Black as almost equal (at first - it later gives White a small edge). I am pretty sure Stockfish9 is closer to the truth.
After the text, Black is lost.
12.Neg5 g6 13.Re1
I spent some time looking at 13.Nxh7!? with the idea of 13...Kxh7 14.h5. It does seem to be sound, but in the end I could not be sure, and anyway my position was so overwhelming I did not need to sac.
13...Rf6 14.h5 Nc6 15.hxg6 hxg6 16.Qe4 Rf5
The analysis engines' choice, but there is a devastating reply.

Position after 16...Rf6-f5

*
*
*
*
*
*
*
*
17.Rh8+!
Black played on with 17...Kg7, but his optimism was not rewarded.