Versus de scachis

 is the title given to a Medieval Latin poem about chess. It is found on two manuscripts from Einsiedeln Abbey Library (ms. numbers 365 and 319), dated to about AD 1000. If this date is accurate it makes the work the earliest known reference to chess in a European text, the next younger reference to the game being in "Ruodlieb", a work dated to the second quarter of the 11th century. The title of is from ms. 365. The text in ms. 319 is incomplete, and entitled .
The poem most likely dates to the 10th century. Gamer (1954) argues that the text in ms. 365 might date to shortly before AD 1000, and the one in ms. 319 dates to about the same time, or possibly to a few years after AD 1000.