1275 Bonus Socius

A very important chess treatise including 194 problems, aiming at completing all known Chess science of the time. Several were of Muslim origin. The provenance is without any doubt from Lombardy. The anonymous author names himself as the bonus socius, hence the title of the work, meaning good companion, a title often given in universities circles. Murray thought that the author could be a Picard monk named Nicholas from St Nicholas (today in Belgium) who had travelled in Lombardy. It also included problems of other boardgames, Tables and Merels. The Bonus Socius had been very popular in France.

Page from Bonus Socius [Yalom 2004:74]