LEADER BOARD

Player | Experience | ELO Rating | Annual Points Race |

Al Cantito | 1003 | 1721.88 | 107.75 |

Jerry Shea | 564 | 1478.62 | 60.75 |

Jay Karns | 629 | 1525.30 | 54.25 |

Jim Sisti | 865 | 1499.80 | 52 |

Bill Porter | 327 | 1639.83 | 50.5 |

Ray Nilson | 549 | 1499.78 | 40.5 |

Andy Fazekas | 278 | 1573.98 | 38.5 |

Sandy Sisti | 829 | 1355.84 | 36.5 |

Ed Corey | 743 | 1436.72 | 21 |

Gerhard Roland | 313 | 1501.58 | 17 |

Tom Meyer | 758 | 1689.47 | 10.25 |

Al Theriault | 163 | 1508.54 | 10 |

Adrian Costa | 216 | 1434.36 | 8 |

Frank Vaccarino | 90 | 1406.94 | 6 |

Sarah Saltus | 81 | 1478.83 | 4 |

Garrett Duquene | 45 | 1492.41 | 3 |

Rich Batt | 55 | 1473.06 | 3 |

Mike Pollack | 72 | 1444.87 | 2 |

Scott Hahn | 62 | 1429.23 | 1 |

Dave Mirto | 116 | 1418.15 | 2 |

Updated 4/20/18

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.