Earlier studies on the Hubbard model have shown that the ground state of two holes in
a small cluster lattice shows d-wave symmetry. While pairing by holes doped into half-
filled Hubbard models has been intensively investigated, we extend such an analysis to
the case of doped strong-coupling altermagnets. To do so, we use exact diagonalization
techniques for a checkerboard model. In our case, nodes in d-wave altermagnetism do
not coincide with gap nodes expected from the Hubbard model. We discuss the extend
of d-wave superconductivity and its competition with other pairing symmetries. We find
altermagnetism to suppress pairing compared to antiferromagnetism.