Caïssa

The figure appears in Hieronymus Vida's 1527 Latin poem Scacchia Ludus as a dryad of chess named 'Schacchia' placed among the gods in a Virgilian-hexameter scene of a chess game between Apollo and Mercury. In 1763 William Jones published an English poem, Caïssa or The Game at Chess, which invents a myth in which the god Mars is spurned by Caïssa and is aided by a deity named Euphron who creates chess as a gift to win her favour. Later authors and commentators adopted and adapted the name and persona; the relationship between Vida's 'Scacchia' and Jones's 'Caïssa' is described in the sources as an unproven or uncertain equivalence rather than an established identity.

Primary sources provide minimal direct visual description. Vida names a 'dryad of chess' called Schacchia, implying a classical nymph-like presence; Jones addresses Caïssa as an object of desire in his poem but gives no consistent iconography. Later cultural treatments personify Caïssa as a feminine muse or goddess of chess in illustrations and references, but the supplied sources record no single, stable physical depiction across texts.

All attributed 'powers' are literary and metaphorical. In Jones's narrative chess is created to win Caïssa's favour, framing her as the object whose approval motivates invention of the game. Modern chess commentators invoke 'Caïssa' to personify good fortune or poetic inspiration in play (for example, Garry Kasparov's remark 'Caïssa was with me' to indicate favorable circumstances). The sources do not describe literal supernatural agency (possession, direct intervention, or harm); her influence is rhetorical and emblematic within poems, commentary, and cultural products.