 In that, "X" = (("rs" + "ra")/"g")0.285, although there is some wiggle room for disagreement in the exponent.Anyway, that equation is simpler, more elegant, and gets the better answer over a wider range of runs scored than Pythagenport, including the mandatory value of 1 at 1 rpg.These formulas are only necessary when dealing with extreme situations in which the average number of runs scored per game is either very high or very low.