Figure 3: Relative density of cooperators in dependence on the occupation fraction for the different fractions of A players when and (see legend). Irrespective of the values of , the relative fraction of cooperators decreases from around 0.47 with the increase of , and then the curves for different values of depart around . For , the relative density of cooperators decreases monotonically with the increase of until approaching zero. When is equal to 0.1 or 0.2, the relative density of cooperators decreases monotonically with the increase of until approaching its minimum value and then increases monotonically with the increase of until approaching its maximum value at . In contrast, when is equal to 0.5, the relative density of cooperators decreases monotonically with the increase of until approaching its minimum value, then increases monotonically with the increase of until approaching its maximum value at around , and finally sharp decreases with the increase of until approaching its minimum value at .