DS-maps on the plane (a₁∕a₂, e₂) when e₁ = 0.2. The values of the orbital elements that remained fixed throughout the computation of the DS-maps are noted above each panel. The dashed grey lines indicate the collision lines between the planets. The coloured bar corresponds to the logarithmic values of DFLI; dark (pale) colours showcase regular (irregular) evolution of the orbits, while white colour depicts the very close encounters and the failure of numerical integration at t < 250 kyr.