Schaffer F6: minimum 0 at the origin, 30 seeds, 50000 evaluations at most per run
runs ending near        best value  SHADE  PSO  GA
the minimum, r = 0        0.000000     30   24  24
the ring at r = 3.14      0.009716      0    6   6
error below 1e-6                       30   24   5
