  In the present work we search for renormalization group invariant relations
among the various massless and massive parameters of the Minimal Supersymmetric
Standard Model. We find that indeed several of the previously free parameters
of the model can be reduced in favor of few, the unique gauge coupling and the
gaugino mass at the unification scale among them. Taking into account the
various experimental constraints, including the B-physics ones, we predict the
Higgs and the supersymmetric spectrum. We find that the lightest Higgs mass is
in comfortable agreement with the measured value and its experimental and
theoretical uncertainties, while the electroweak supersymmetric spectrum starts
at 1.3 TeV and the colored at ~4 TeV. Thus the reduced MSSM is in natural
agreement with all LHC measurements and searches. The supersymmetric and heavy
Higgs particles will likely escape the detection at the LHC, as well as at ILC
and CLIC. However, the FCC-hh will be able to fully test the predicted
parameter space.
