At the end of the 19th and the beginning of the 20th century, Jacobs ranked among the strongest chess-players of England. He made frequent appearances in the City of London Chess Club's Championships tournaments, and in the British Chess Championship competitions.
He played seven times for England in the Anglo-American cable match, scoring +4, =2, and -1.
Jacobs was a fine natural player, but his lack of book knowlegde of openings, which he freely admitted, precluded him from attaining an even higher rank.
He was a barrister-at-law of the Honourable Society of the Inner Temple, and Law Tutor to the Chartered Accountants Students' Society of London. He authored several editions of Stevens' Elements of Mercantile Law.
Source: BCM, Vol. LXX (1950), p 153.
Source: "Stevens' Elements of Mercantile Law", 5th ed. (London 1911) and 10th ed. (London 1938).