Porter, Dot2023-05-232022-11-072022-11-072022-11-07https://repository.upenn.edu/handle/20.500.14332/46577Treatise by Benedetto Varchi on proportion as the basis for rithmomachia, a mathematical game played on a chessboard with pieces that each have a shape and a number; a dialogue written by Carlo di Ruberto Strozzi, in which Cosimo Rucellai, who introduced the game to Benedetto Varchi, teaches the rules to Strozzi and Jacopo di Piero Vettori; and other notes on the game. Later unrelated notes and pen trials on leaves before and after main texts. Damage and bleed-through due to oxidation on many leaves.Rithmomachia (Game)Mathematical recreations -- Early works to 1800Mathematical recreationsCodicesDiagramsDialoguesTreatisesManuscripts ItalianManuscripts LatinManuscripts RenaissanceHistory of Science, Technology, and MedicineMathematicsRenaissance StudiesArticle