Dependence of our key metric d_min – a minimum size of seed planetesimals that results in their eventual growth beyond 300 km – on some parameters of our simulations: (a) surface density normalization Σ₀, (b) disk eccentricity normalization e₀, (c) apsidal angle of the disk ϖ_d, (d) amplitude of the random velocity of planetesimals σ_i, and (e) parameter χ_ir (artificially) regulating the magnitude of planetesimal inspiral. Solid lines and diamond points correspond to d_min, whereas dashed lines and circles are for – the minimum size for collisionally weak planetesimals. The causes of the trends shown here are discussed in Sects. 6.1–6.7. In each panel, the fiducial simulation is highlighted in red.