2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/194771We explore a ``fertile patch'' of the heterotic landscape based on a Z_6-II orbifold with SO(10) and E_6 local GUT structures. We search for models allowing for the exact MSSM spectrum. Our result is that of order 100 out of a total 3\times 10^4 inequivalent models satisfy this requirement.13 pages, for associated information see http://www.th.physik.uni-bonn.de/nilles/Z6IIorbifold/, v2: matches version published in PLBHigh Energy Physics - Theorytext