James Mason was a British-American chess player, journalist and writer who became one of the world's best half-dozen players in the 1880s. Mason was ranked the number 1 player in the world by Chessmetrics during 11 separate months between August 1877 and June 1878.

The American Chess Congress was a series of chess tournaments held in the United States, a predecessor to the current U.S. Chess Championship. It had nine editions, the first played in October 1857 and the last in August 1923.