LEADER BOARD

Player | Experience | ELO Rating | Annual Points Race |

Al Cantito | 1197 | 1719.83 | 166.25 |

Jerry Shea | 771 | 1517.96 | 117.25 |

Jim Sisti | 1062 | 1518.61 | 106.75 |

Jay Karns | 730 | 1529.61 | 79.75 |

Ray Nilson | 680 | 1494.37 | 67.25 |

Andy Fazekas | 428 | 1513.04 | 63 |

Bill Porter | 380 | 1652.90 | 62.5 |

Sandy Sisti | 965 | 1357.67 | 60 |

Chris Knapp | 45 | 1557.17 | 26 |

Frank Vaccarino | 208 | 1410.49 | 26 |

Ed Corey | 778 | 1423.12 | 24 |

Al Theriault | 216 | 1519.32 | 21.5 |

Gerhard Roland | 313 | 1501.58 | 17 |

Sarah Saltus | 151 | 1450.74 | 15.5 |

Felix Goykhman | 52 | 1528.48 | 15 |

Adrian Costa | 275 | 1416.90 | 14 |

Tom Meyer | 758 | 1689.47 | 10.25 |

Garrett Duquene | 82 | 1505.09 | 7 |

Jim Stutz | 93 | 1491.98 | 6.75 |

Dave Mirto | 139 | 1412.66 | 4 |

Gary Koscielny | 34 | 1501.04 | 3 |

Paul A Caracciolo | 30 | 1499.58 | 3 |

Rich Batt | 55 | 1473.06 | 3 |

Paul M Caracciolo | 25 | 1489.30 | 2 |

Scott Salisbury | 23 | 1488.29 | 2 |

Mike Pollack | 72 | 1444.87 | 2 |

Jim O'Toole | 7 | 1489.95 | 1 |

Patty Knapp | 16 | 1476.71 | 1 |

Scott Hahn | 62 | 1429.23 | 1 |

Updated 8/11/18

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.