The heroine in The Chessmen of Mars is Tara, princess of Helium, daughter of John Carter and Dejah Thoris. A typical Barsoomian capture by evil headless men, the subsequent rescue attempt by a dashing prince, Gahan of Gathol. This Barsoom Novel contains everything you can expect from Burroughs' fantastic Mars Books.
The Chessmen of Mars, first published in 1922, is the fifth book in the Barsoom-series.