Formulae
PLB= [ Alog(N) * w[N/B]/[N/B] * w[N*(B-1)/B]/[N*(B-1)/B] * D ]
|dPR|= [ C * PR,Wlog(PR,L) / (|RW-RL|+1) ]
dLPR= -dWPR = -|dPR|
ddrawPR= 0
if PR,1 < 0, PR=0
R= [PR/D] + 1
if R1 < R0, R = R0
Rcmp= Rrmp
N: total number of ranked games played in current season/patch
w(X): number of wins...