LEADER BOARD

Player | Experience | ELO Rating | Annual Points Race |

Al Cantito | 1269 | 1698.28 | 179.25 |

Jerry Shea | 804 | 1514.30 | 125.25 |

Jim Sisti | 1131 | 1516.42 | 121.75 |

Jay Karns | 765 | 1535.90 | 92.75 |

Andy Fazekas | 468 | 1523.88 | 78 |

Sandy Sisti | 1025 | 1369.53 | 72.75 |

Ray Nilson | 687 | 1489.16 | 68.25 |

Bill Porter | 404 | 1647.94 | 65.5 |

Jim Stutz | 135 | 1548.58 | 29.75 |

Ed Corey | 828 | 1408.18 | 29 |

Chris Knapp | 45 | 1557.17 | 26 |

Frank Vaccarino | 208 | 1410.49 | 26 |

Al Theriault | 228 | 1505.38 | 22.5 |

Adrian Costa | 304 | 1413.21 | 18 |

Gerhard Roland | 313 | 1501.58 | 17 |

Sarah Saltus | 151 | 1450.74 | 15.5 |

Felix Goykhman | 52 | 1528.48 | 15 |

Tom Meyer | 758 | 1689.47 | 10.25 |

Mike Pollack | 103 | 1450.98 | 9.25 |

Garrett Duquene | 82 | 1505.09 | 7 |

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 |

Jim O'Toole | 7 | 1489.95 | 1 |

Patty Knapp | 16 | 1476.71 | 1 |

Scott Hahn | 62 | 1429.23 | 1 |

Updated 9/14/18

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.