Comparison of the position of the 10 subdwarfs (with error bars) from the HMF project in the T_eff-log g-diagram to evolutionary tracks of Dorman et al. (1993) for a metallicity of  [Fe/H]  =  −1.48. The ZAHB and the TAHB are only indicated from fitting of the tracks. The SPY subdwarf B sample is plotted for reference (Lisker et al. 2005). Two subdwarfs lie lie well above the canonical TAHB and therefore are most likely in a shell-He burning post-EHB stage of evolution.