"Jacob Bernard (Jack) de Haas (London, 1875 - Scheveningen, 1940) was a Dutch draughts player who played two matches and two tournaments for the world championship on draughts. He became four times Dutch champion in 1908, 1911, 1916, and 1919."@en . . . . "Dutch draughts player" . "1940Z"^^ . "Jacob Bernard (Jack) de Haas"@en . . "Jack de Haas"@en . "1875Z"^^ . . . "Haas, Jack de"@en .