Löwenthal against Morphy — the thirteenth game of their 1858 London match, a drawn Petroff's Defence.
14…f5Correctly played.
15…Bxg2Black had no better move, for if he had retreated the Bishop to B's 2nd, White might have replied with P. to Q's 5th; the Knight would then have been driven to K's 2nd, whereupon would have followed R. to K's sq., and White would have had a magnificent position.
21.Qf3Improving White's game yet further.
21…Nh6A lost move; Black overlooked, at the moment, that he could not on his next move advance the Knight to Knight's 5th without White's instantly taking it with the Queen.
24…b5P. to Kt's 3rd would perhaps have been better.
27.Re6This move wins a piece, as may be seen from the diagram of the position after White had played thus.
27…Rxe6If he play Q. to R's 4th, White replies with B. to Q's sq., and wins.
31…Qc6+It might have been better to have taken the Pawn with the King.
36.Qh5K. to Kt's 3rd seems preferable.
39.Qh8A vexatious and extraordinary oversight, which draws an easily won game.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source