  The integrable XXZ alternating spin chain with generic non-diagonal boundary
terms specified by the most general non-diagonal K-matrices is studied via the
off-diagonal Bethe Ansatz method. Based on the intrinsic properties of the
fused R-matrices and K-matrices, we obtain certain closed operator identities
and conditions, which allow us to construct an inhomogeneous T-Q relation and
the associated Bethe Ansatz equations accounting for the eigenvalues of the
transfer matrix.
