Summer Prague Round Six

FACED a Czech in round six of Summer Prague U2000 this afternoon.
Jaromir Krupanský (1661) - Spanton (1831)
Sicilian Hyper-Accelerated Dragon
1.e4 c5 2.Nf3 g6 3.d4 cxd4 4.Qxd4 Nf6 5.Nc3 Nc6 6.Qd3!?
A rare alternative to the main move 6.Qa4.
6...Bg7 7.Be3 0-0 8.Be2 d6 9.h3 a6!?
Stockfish11 and Komodo11.01 do not like this, preferring 9...b6 or 9...Be6.
10.a3 b5 11.0-0 Bb7 12.Nd5?!
White should probably have got on with developing his rooks.

How should Black proceed?

12...Nxd5?
This is wrong on two counts. First, a white pawn on d5 will cramp Black; second, there was a way to take advantage of White's slightly exposed queenside, namely by 12...Nd7, after which White may have nothing better than 13.Nc3, when 13...Nc5 keeps up the pressure.
13.exd5 Ne5 14.Nxe5 dxe5!?
The idea is to attack on the kingside.
15.Rad1 f5
The engines prefer central play with 15...Qd6.
16.Qb3 Qd7 17.c4 f4?
The engines give 17...bxc4 18.Bxc4 Kh8 with the better game for White.
18.Bg4 Qd6?
Another mistake. Better, but good for White, is 18...bxc4 19.Qxc4 Qb5 20.Qxb5 axb5 21.Bc5.
19.c5 Qf6 20.Bd2
Even stronger is 20.c6 Bc8 21.d6, but the text is simpler and also winning.
20...Kh8 21.c6 Bc8 22.Bxc8 Rxc8 23.Bb4 Qf7 24.Rfe1 Rxc6
Relief for Black? No!
*****
*****
*****
*****
*****
25.Bxe7 Re8 26.Qf3 Rc7 27.d6 Rd7 28.Qc6 Qe6 29.Qc5 Bf6?
White is still much better after, say, 29...Kg8, but the text lets White swop off his bishop, which looks good but is actually impeding White's queenside play.
30.Bxf6+ Qxf6 31.Qc6 Red8 32.Qxa6 b4!?
The pawn will be lost anyway.
33.axb4 Rxd6 34.Rxd6 Rxd6 35.Qc8+ Rd8 36.Qc3 Rd4 37.b5
The passed pawn and the exposed black king bring a swift conclusion.
37...Qd6 38.b6 Qxb6 39.Rxe5 Rd1+ 40.Re1 1-0