Color–magnitude diagram of the Hyades open cluster. Open circles are the whole sample of Hyades stars with magnitudes from the Hipparcos catalogue. Filled black circles are the sample of stars form Takeda et al. (2013) for which we have a lithium abundance estimation. Blue diamonds represent the known binaries of this sample. The continuous line is the isochrone of 0.79 Gyr, calculated from our TGEC models with extra mixing, and the dotted line is the isochrone of 0.69 Gyr, calculated from standard models.