private static int CalculateMagicWallInfluenceSeed(FieldView field)
{
var emptyCellsCount = field.GetCellsOfType(CellType.Empty).Count();
var factor = Math.Max(0, emptyCellsCount - 1000) / 80 + 1;
factor = Math.Min(10, factor);
var inversedFactor = 10 - factor;
return(inversedFactor * inversedFactor);
}