Player Experience ELO Rating Annual Points Race
Al Cantito 933 1696.09 69.25
Jay Karns 600 1533.47 50.25
Bill Porter 327 1639.83 49.5
Jerry Shea 519 1475.71 41.75
Jim Sisti 812 1514.90 41
Andy Fazekas 221 1588.27 25.5
Ray Nilson 497 1497.49 23
Ed Corey 726 1441.96 18
Gerhard Roland 313 1501.58 17
Sandy Sisti 773 1338.67 17
Tom Meyer 758 1689.47 10.25
Al Theriault 163 1508.54 9
Adrian Costa 194 1432.36 5
Sarah Saltus 81 1478.83 4
Mike Pollack 72 1444.87 2
Frank Vaccarino 59 1424.88 2
Scott Hahn 62 1429.23 1

Updated 3/16/18

Annual Points Race Accrual Methodology


For each tournament event, Points are awarded to players as follows:


1.  A player receives 1 Point for each match they win and for every meetup they attend.


2.  Bonus Points are established based on the number of event participants and distributed thus:


A.  1st Place receives an amount equal to the total number of participants


B.  2nd Place receives an amount equal to one-half the total number of participants


C.  3rd Place (Optional) receives an amount equal to one-quarter the total number of participants


All tournament event points awarded to a player are added to their annual cumulative total.



FIBS Rating Formula*


These are the formulas used to determine the ratings of a player:


Let's say that two players P1 and P2 were playing a n-point match. The ratings of the players are r1 for P1 and r2 for P2 .


Let D = abs(r1-r2) (rating difference)

Let P_upset = 1/(10^(D*sqrt(n)/2000)+1) (probability that underdog wins).

Let P=1-P_upset if the underdog wins and P=P_upset if the favorite wins.


For the winner:

Let K = max ( 1 , -experience/400+2 )

The rating change is: 4*K*sqrt(n)*P


For the loser:

Let K = max ( 1 , -experience/400+2 )

The rating change is: -4*K*sqrt(n)*P


The 'experience' of a player is the sum of the lengths of all matches a player has finished. Every player starts with a rating of 1500 and an experience of 0.


*Thanks to FIBS (First Internet Backgammon Server) for providing the rating formula as part of their HELP menu.