Morphy at the odds of his Queen's Knight against Mr. Julien — a Philidor's Defence in which Morphy exchanges freely yet keeps his opponent's forces locked up. Notes by Löwenthal.

1. 4.Bc4 This move, which may be played without disadvantage, produces a position similar to one that occurs in the Scotch opening.
2. 13.Bxe5 The exchange of pieces generally tells against the player giving the odds; and the student will therefore, perhaps, be surprised at seeing Mr. Morphy playing so much against rule. An attentive examination, however, of the position, will make it apparent that his proceedings were governed by foresight and prudence, his opponent's pieces remaining locked up and useless, while his own are rapidly deployed and brought to bear on the enemy's weakest point. In Chess, as in military tactics, it is the judicious violation of general rules that more especially marks the master-mind.
3. 15.Rxd6 A timely sacrifice, which brings the game to a speedy and successful conclusion:—