HR diagrams of two models with identical masses of 917 M_⊙, accreted until the end of core silicon burning. The red line depicts the model computed using the variable accretion rate from Yoshida et al. (2007), and the cyan line represents a model with a constant accretion rate of 2.615 × 10⁻⁴M_⊙ yr⁻¹. The black line is the ZAMS line, and the dots indicate the masses in M_⊙. The dotted grey lines are the iso-radius line, with values depicted in solar radii.