LEADER BOARD

Player | Experience | ELO Rating | 2018 Points Race |

Al Cantito | 1341 | 1661.20 | 187.25 |

Jim Sisti | 1215 | 1533.99 | 143.75 |

Jerry Shea | 867 | 1526.73 | 134.25 |

Jay Karns | 800 | 1560.13 | 104.75 |

Sandy Sisti | 1090 | 1357.46 | 82.75 |

Andy Fazekas | 497 | 1508.62 | 82 |

Bill Porter | 425 | 1649.73 | 77.5 |

Ray Nilson | 687 | 1489.16 | 68.25 |

Ed Corey | 910 | 1439.53 | 58.5 |

Jim Stutz | 176 | 1564.88 | 44.5 |

Chris Knapp | 45 | 1557.17 | 26 |

Frank Vaccarino | 208 | 1410.49 | 26 |

Al Theriault | 228 | 1505.38 | 22.5 |

Adrian Costa | 316 | 1404.06 | 18 |

Sarah Saltus | 175 | 1421.48 | 17.5 |

Gerhard Roland | 313 | 1501.58 | 17 |

Felix Goykhman | 52 | 1528.48 | 15 |

Mike Pollack | 115 | 1437.90 | 11.25 |

Tom Meyer | 758 | 1689.47 | 10.25 |

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 11/9/18

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. Tournament 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.