LEADER BOARD

Player | Experience | ELO Rating | Annual Points Race |

Tom Meyer | 674 | 1698.50 | 209.25 |

Al Cantito | 682 | 1683.88 | 168.25 |

Jim Sisti | 603 | 1493.99 | 103.25 |

Sandy Sisti | 591 | 1398.03 | 80.25 |

Ed Corey | 585 | 1463.26 | 75.5 |

Jay Karns | 402 | 1507.86 | 71 |

Gerhard Roland | 254 | 1501.33 | 63.5 |

Ray Nelson | 356 | 1476.95 | 63.25 |

Jerry Shea | 313 | 1455.71 | 46 |

Bill Porter | 210 | 1573.99 | 42.5 |

Andy Fazekas | 143 | 1545.54 | 24.75 |

Al Theriault | 101 | 1520.20 | 17 |

Dan Whitney | 77 | 1474.56 | 12.5 |

Mark Denihan | 17 | 1528.48 | 11 |

Ross Gordon | 15 | 1526.77 | 10 |

Jim Stutz | 57 | 1494.50 | 10 |

Adrian Costa | 124 | 1449.92 | 9.75 |

Dave Mirto | 116 | 1418.15 | 9 |

Jessica Madeux | 94 | 1396.53 | 7 |

Terri White | 68 | 1469.55 | 4 |

Rob Roy | 55 | 1478.12 | 3 |

Mike Pollack | 53 | 1471.38 | 3 |

Scott Hahn | 55 | 1438.15 | 3 |

Mike Agranoff | 25 | 1510.28 | 2 |

Steve Nahas | 19 | 1490.88 | 1 |

Dick Clukey | 23 | 1489.22 | 1 |

Chris Masterson | 12 | 1480.01 | 1 |

Rich Batt | 31 | 1472.32 | 1 |

Frank V | 37 | 1455.54 | 1 |

Sarah Siddig | 21 | 1534.37 | 0 |

Garrett Duquene | 19 | 1492.78 | 0 |

Updated 12/8/17

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.