Morphy against Löwenthal — the eighth game of their 1858 London match (Philidor's Defence), one of Löwenthal's three wins.
11…Bd6It would have been better to have taken the Pawn.
12.f5This cramps Black's position excessively.
13…h6Taking Pawn with either Knight or Bishop would have been hazardous, as it would have enabled White to obtain a sharp attack on the K's side.
18.Qg4Mr. Morphy thinks that this was premature, and that K. to R's sq., preventing the exchange of Bishops, would have given him a strong game.
23.Bxc5If White had taken the Rook, thinking to win a piece, Black (as may be seen from the diagram) would have gained an advantage as follows: 23. R. takes R. (ch.), Q. takes R.; 24. B. takes B., Q. to Q's 8th (ch.); 25. K. to B's 2nd, Q. takes P. (ch.), recovering the piece with the better game.
26…c5This was the correct move.
27…Kf8Black's situation, at this moment, was one of much difficulty, and required the utmost care and accuracy. The loss of a move would have proved fatal.
45…a4The correct mode of retaining the opposition.
49…Kg7Great nicety of play was also required here, and had the King been played elsewhere the game would have been lost.
51.Kg1A venture which loses the game; as the termination forms an instructive study we add a diagram, which shews the position after White's 47th move.
J. Löwenthal, Morphy's Games of Chess (1860) · Public domain · source