Visualisation of the resulting χ² space from the multi-dimensional grid search using the high-resolution MESA/GYRE grid. The first seven panels (from left to right and top to bottom) show the dependence of the χ² value on effective temperature, surface gravity, mass, radius, overshooting, metallicity, and central hydrogen content of the corresponding model. The last two panels show the χ² distribution of the model points over the Kiel diagram, and over a log T_eff versus measured average period spacing diagram. The colour of each symbol represents the logarithm of the corresponding χ² value. The 1-σ and 3-σ error boxes of KIC 10526294 in log T_eff, log g, and mean period spacing are plotted using solid and dashed lines, respectively. The position of the best model is marked with a white asterisk. For further details, see explanation in the text.