LEADER BOARD

ELO | Annual | ||

Player | Experience | Rating | Points Race |

Tom Meyer | 429 | 1634.83 | 146.75 |

Al Cantito | 432 | 1629.74 | 119.5 |

Jim Sisti | 394 | 1491.90 | 74.25 |

Sandy Sisti | 400 | 1451.05 | 61.75 |

Jay Karns | 267 | 1526.84 | 58.5 |

Ed Corey | 322 | 1447.16 | 51.25 |

Gerhard Roland | 164 | 1499.38 | 41 |

Ray Nelson | 208 | 1506.43 | 37.75 |

Bill Porter | 172 | 1567.33 | 35 |

Jerry Shea | 150 | 1471.60 | 22 |

Andy Fazekas | 111 | 1514.51 | 20.75 |

Al Theriault | 101 | 1520.20 | 17 |

Mark Denihan | 17 | 1528.48 | 11 |

Ross Gordon | 15 | 1526.77 | 10 |

Dan Whitney | 41 | 1511.66 | 9.5 |

Dave Mirto | 116 | 1418.15 | 9 |

Adrian Costa | 86 | 1464.05 | 7.75 |

Jim Stutz | 21 | 1510.35 | 6 |

Terri White | 68 | 1469.55 | 4 |

Jessica Madeux | 58 | 1442.54 | 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 |

Updated 8/18/17

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.