The topological Hall effect (THE), as one of the primary manifestations of
non-trivial topology of chiral skyrmions, is traditionally used to detect the
emergence of skyrmion lattices with locally ferromagnetic order. In this work
we demonstrate that the appearance of non-trivial two-dimensional chiral
textures with locally {\it anti}-ferromagnetic order can be detected through
the spin version of the THE $-$ the topological spin Hall effect (TSHE).
Utilizing the semiclassical formalism, here used to combine chiral
antiferromagnetic textures with a density functional theory description of the
collinear, degenerate electronic structure, we follow the real-space real-time
evolution of electronic SU(2) wavepackets in an external electric field to
demonstrate the emergence of sizeable transverse pure spin current in synthetic
antiferromagnets of the Fe/Cu/Fe trilayer type. We further unravel the extreme
sensitivity of the TSHE to the details of the electronic structure, suggesting
that the magnitude and sign of the TSHE in transition-metal synthetic
antiferromagnets can be engineered by tuning such parameters as the thickness
or band filling. Besides being an important step in our understanding of the
topological properties of ever more complex skyrmionic systems, our results
bear great potential in stimulating the discovery of antiferromagnetic
skyrmions