RIO, Ercole del. Sopra il Giuoco degli Scacchi, osservazioni pratiche, Milan, Lorenzo Sonzogono, 1860, sm. 8°, second edition, second issue, engraved frontispiece (slightly affected by Blass library stamp), modern vellum-backed boards, original wrappers bound in (front wrapper strengthened on verso). [VDL Geschichte I, p. 372; Schachlitteratur 2190; KB 517]