Spin evolution of Kepler-1705b for different values of the C22 coefficient. Top: Residual C22. Bottom: Synchronous averaged C22. Each pixel represents an initial condition for the spin of the planet. The x-axis shows the initial position of the ellipsoid with respect to the direction of the star, while the y-axis represent the initial spin rate. The colour of the pixels shows the derivative of the main frequency of the spin of the planet (f) with respect to the initial spin rate. This is an indicator of the spin state (Leleu et al. 2016): dark blue indicates a libration inside a spin-orbit resonance, cyan/green indicates a circulation of the spin, and red area indicates chaotic rotation.