Morphy against Bird, London 1858 — a casual Allgaier Gambit. Notes by Löwenthal.
9.Nc3One of Mr. Morphy's many excellent inventions; we first saw him adopt it with success against Mr. Medley.
10.Ne2Neutralizing the power of the adverse King's Knight.
13.Bg5With a winning position.
13…f6P. takes Kt., instead, would have availed nothing, because White by retaking Pawn with Queen would have regained the piece and brought his Queen into powerful co-operation.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source