Leonhardt - Marshall, San Sebastian, 1911

Held at a seaside resort in San Sebastián, Spain, the International Chess Tournament of the Gran Casino invited only masters who had performed well in strong tournaments, creating one of the strongest chess tournaments ever. In round twelve, Paul Leonhardt and Frank Marshall played the King's Gambit Declined.

The Nordic Chess Champion Paul Saladin Leonhardt studied a variety of openings and deployed a sharp playing style, which won him many brilliancy prizes. Frank James Marshall favored aggressive play and confounding complications, prompting his nickname "The Great Swindler;" he won the U.S. Chess Championship twice before relinquishing the title to allow a change from a match to a tournament format.

Edward Lasker annotated the game in 1915.