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Gustavus Selenus
(1579 - 1666)
Das Schach- oder König-spiel
(1616)
The first German textbook, ’Das Schach- oder König-spiel’ (Leipzig, 1616), based on the work of Ruy Lopez, was written by Gustavus Selenus (1579-1666). His real name was Duke Augustus of Lüneberg (Duke of Brunswick)