"Ritchie, David"@en . "American game designer" . "1950Z"^^ . . . "David James Ritchie (October 6, 1950 - September 6, 2009) was a game designer and author."@en . "2009-09-06Z"^^ . "David J. Ritchie"@en . "1950-10-06Z"^^ . . "2009Z"^^ .