James Mason (November 19, 1849 – January 12, 1905) was a famous chess player and writer. He was born in Kilkenny in Ireland. His original name is unknown: he was adopted as a child and only took the name James Mason when he and his family moved to the United States in 1861. There he learnt chess and eventually secured a job at the New York Herald.
Mason made his first mark on the chess scene in 1876, when he won the Fourth American Congress in Philadelphia, the New York Clipper tournament, and defeated Henry Bird in a match by the comfortable margin of 13—6. In 1878 he settled in England. His best tournament results were third at the very strong Vienna 1882 tournament, third at Nuremberg 1883 and equal second at Hamburg 1885. At Hastings 1895, often considered the strongest tournament of the nineteenth century, he finished tied for 12th-14th with 9.5 points of 21 possible.
Mason wrote several books on chess, the most popular being The Principles of Chess in Theory and Practice (1894), The Art of Chess (1895), Chess Openings (1897), and Social Chess (1900).
The opening 1.d4 d5 2.Bf4 (in algebraic chess notation) is sometimes called the Mason Variation in his honour; he played it several times from the 1880s. The variation of the King's Gambit 1.e4 e5 2.f4 exf4 3.Nc3 (allowing 3...Qh4+) is sometimes called the Mason Gambit, though Mason lost the only game he played with it (against Samuel Rosenthal at Paris 1878); it is also known as the Keres Gambit. The 1.e4 e5 2.Nf3 Nf6 3.Nxe5 d6 4.Nf3 Nxe4 5.d4 d5 6.Bd3 Be7 7.0-0 0-0 variation of the Petroff Defence is also named after him.
According to Chessmetrics, at his peak in October 1876 Mason's play was equivalent to an Elo rating of 2715, and he was ranked number 2 in the world, behind only Wilhelm Steinitz. However, Mason was ranked the number 1 player in the world, albeit with a slightly lower rating, during 11 separate months between August 1877 and June 1878. His best single performance was at Vienna 1882, where he scored 15 of 23 possible points (65%) against 2622-rated opposition, for a performance rating of 2732.