Game 51 in Philip W. Sergeant’s Morphy’s Games of Chess (1916), printed pages 109–110. Commentary from this edition; named earlier annotators remain credited in the notes. Third game of the 1858 Anderssen match. The source gives the playing time as two hours.

1. 4.d4 The present game is the only example which we have of Morphy’s treatment of the Lopez when met by the Berlin Defence. 4 P—Q4 is seldom adopted now in master-play, being considered productive, with correct play on both sides, of no more than a level game.
2. 6…c6 This, however, is not good. KKt×P is better; and P×P better still.
3. 7.O-O Anderssen follows a Handbuch variation and comes to grief in it. M.L. points out the irony of a German master failing in a line of play analysed in Germany. That Morphy knew exactly what he was doing is clear from the quotation below.
4. 7…cxb5 B—B4, to which he could have replied, is better; 7..Kt—Q4 might be answered by 8 Q×P, Kt—B2; 9 B—QB4, P×B.
5. 8.Bg5 Best. 8..P—KR3 is fatal.
6. 9.exf6 If P×P, 10 Q×P, R—KKt1; 11 B—B4.
7. 12.c3 Morphy remarks in his notes on this game (A.C.M., 1859): “Up to this move the game coincides with one played by Lange in his Schachpartieen. That distinguished master now played 12 Kt—R3, P—QR3; 13 Q—K2, Q—K3; 14 Q—Q2, Q—QKt3; 15 Q—Kt4ch, P—Q3; 16 Kt—B4, Q—B4; 17 Kt×P, R×Q; 18 R—K8 mate.” Here 13..P—KKt3; 14 QR—Q1, P—R4; 15 R—Q3 is better, but White’s position is tremendously strong. Morphy plays to develop his Kt to a more natural square. A game Bird—Steinitz, 1867, ctd.: 12 Q—K2, P—KKt3; 13 Kt—Q2.
8. 17…g5 It is difficult to comprehend this move from a player of Anderssen’s strength, when one step less with the Pawn was so clearly better.
9. 18.Qd1 Not 18 Kt×P because of the reply Q—Q3.
10. 19…Rg8 A crowning blunder. 19..K—Kt2 is necessary. Even 19..P—KKt5 was better.
11. 20.Rxe6 The Rook cannot be captured. Anderssen shows none of his high talent in this game.