Game 249, Mason, James–Martinez, Dion M, played April 10, 1889, from Wilhelm Steinitz, The Book of the Sixth American Chess Congress (1891), printed pages 315–316.

1. 7.f5 Chiefly in consequence of Black's weak 3d move White had obtained an early superiority of position, provided that he reserved the option of opening the KB file. The advance in the text, however, not alone abandons his advantage but costs a valuable Pawn besides.
2. 12…Qf6 12...B x P would have increased his superiority. For if 13 R x P, 13 Kt—R4, with a fine game, whereas after the move in the text his position becomes much inferior.
3. 13.Nd2 An excellent move that gives White the attack again.
4. 22.Bxe6 Much stronger was 22 R—B3, 22 QR—B sq.; 23 Q—KB4, threatening R—Kt3, etc.
5. 34.Rcb6 Loss of valuable time which, in fact, deprives him of a victory that could have been secured by the persistent advance of his centre Pawns.
6. 39…Ra5 Black has made a masterly defence and now equalizes matters to the extent that, though he remains a Pawn behind, he can draw with common care.