LEADER BOARD

ELO | Annual | ||

Player | Experience | Rating | Points Race |

Tom Meyer | 341 | 1620.64 | 112.75 |

Al Cantito | 305 | 1587.12 | 86 |

Jay Karns | 248 | 1534.32 | 56.5 |

Jim Sisti | 304 | 1461.76 | 47.25 |

Sandy Sisti | 319 | 1448.40 | 41.75 |

Ed Corey | 248 | 1478.73 | 41 |

Gerhard Roland | 152 | 1514.65 | 40 |

Ray Nelson | 162 | 1503.95 | 31.75 |

Bill Porter | 151 | 1562.57 | 27.5 |

Al Theriault | 101 | 1520.20 | 17 |

Jerry Shea | 97 | 1492.94 | 16 |

Andy Fazekas | 90 | 1506.15 | 13.25 |

Mark Denihan | 17 | 1528.48 | 11 |

Ross Gordon | 15 | 1526.77 | 10 |

Adrian Costa | 74 | 1482.16 | 6.75 |

Jim Stutz | 21 | 1510.35 | 6 |

Dave Mirto | 87 | 1425.62 | 5 |

Terri White | 68 | 1469.55 | 4 |

Rob Roy | 55 | 1478.12 | 3 |

Mike Pollack | 53 | 1471.38 | 3 |

Jessica Madeux | 46 | 1460.35 | 3 |

Mike Agranoff | 25 | 1510.28 | 2 |

Dan Whitney | 20 | 1499.93 | 2 |

Scott Hahn | 43 | 1456.63 | 2 |

Steve Nahas | 19 | 1490.88 | 1 |

Dick Clukey | 23 | 1489.22 | 1 |

Rich Batt | 31 | 1472.32 | 1 |

Frank V | 37 | 1455.54 | 1 |

Updated 7/14/17

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.