Game IV of the Pawn-and-move odds match; Black wins.
11…Nf7If this Knight had been left to be captured by White, the adverse Queen's Knight might have been brought into the game at Q's 6th, with annoying effect.
14.Re1P. to Q. B's 4th would perhaps have been stronger play.
21…Bf5The best move.
35…Ne5An effective mode of continuing the game, as shortly becomes apparent.
36…Nxf3Finely played; whether the Knight be captured or not, White must remain in a greatly inferior position.
44…Qf6Black judiciously offered to exchange Queens; for if his adversary had accepted the challenge, his isolated Queen's Pawn would immediately have been lost, and with it the game.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source