2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/70787We classify all Gorenstein Fano threefolds with at worst canonical singularities for which the anticanonical system has a nonempty base locus.14 pages, LaTeX2e; final version, to appear in Comp. MathAlgebraic Geometry14J45, 14J30Gorenstein Fano threefolds with base points in the anticanonical systemtext