Mophy v The Evans (part six)

THE following game, perhaps Paul Morphy's most famous Evans' Gambit as Black, was played against the French-born chess problemist and author Napoleon Marache.
Marache - Morphy
New York 1857
1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.b4 Bxb4 5.c3 Ba5 6.d4
The normal move today - played three times against Morphy by James Thompson.
6...exd4 7.e5?!
Thompson played 7.0-0 in the first game against Morphy, and then switched to 7.Qb3. Both moves are almost certainly better than the text, which advances a pawn across the halfway line without hitting an opposition piece.
7...d5
The standard response in open games to White's e5.
8.exd6 Qxd6!?
My main analysis engines, Stockfish10 and Komodo10, prefer 8...cxd6, but Morphy characteristically takes the chance to develop a piece.
9.0-0 Nge7 10.Ng5?!
This attack gets White nowhere, so almost certainly better was recapturing a pawn with 10.Nxd4, or developing with tempo with 10.Ba3 (the move that engines reckon is the drawback to 8...Qxd6!?).
10...0-0
Now 11.Qh5 is simply met by 11...Qg6, so White, not wanting an exchange of queens, attacks h7 in another way.
11.Bd3

Position after 11.Bd3

*****
*****
*****
*****
*****
11...Bf5!? 12.Bxf5 Nxf5 13.Ba3 Qg6 14.Bxf8 Qxg5 15.Ba3
Morphy could have avoided losing the exchange by playing 11...h6, but he realises White's loss of time will give Black a strong attack.
15...dxc3 16.Bc1 Qg6 17.Bf4 Rd8 18.Qc2 Ncd4 19.Qe4 Ng3! 20.Qxg6
Other moves cost White his queen.
20...Nde2#