Bridge Now ELO rating

Using data since January 2017 I have been calculating a rating list for

http://bridge-now.com

The basic formula is 3 times your old rating plus some factor of your expected performance plus top 50 players get 1-50 points. I need help on how to work this rating as currently the top 10 players need to pass 70% in a week of hands to maintain their rating. Consistent 70% scoring in bridge is too much to maintain I think. Maybe if I change the top 50 players getting 1-50 points to top 10% of the weekly players which is currently just past 700 so 1-70 points awarded for weekly placing. I am looking to parallel to the chess ELO ratings.

Also I let the Bridge Now site method of drop 5 bad boards for over 70 hands played
factor in as the experience gained from playing lots of hands

From May 2017 I will decay inactive players by 10 points per week and use top 10% as the bonus
instead of top 50. Maybe the number of times your current rating should be higher like 5 or 7 or 10
as we are calculating every week a fresh rating.



If anyone wants the full file then email eamongalligan@eircom.net
If anyone wants their rating hidden then email same
If anyone if Irish and wants to be included on Irish list then email same
Any advice send email


Current top 50

jim me	2212.174
Karl Cashen	2190.279
Pierre DELVAULX	2141.032
Patrick 27	2093.164
MC51	2092.939
Graham Hazel	2074.603
John Horn	2044.733
Eamon Galligan	2032.851
Tudor Trocan	2030.184
B.J. O'Brien	2028.115
pinco pallino	2027.22
WBridge5 (Robot)	2023.116
Bernard CARPENTIER	2023.078
Noëlle Delahaye-Levesque	2022.557
Marek.C	2022.488
David Welsh	2020.309
pietro serioi	2016.282
Jinn	2006.405
Igor Milevoj	1987.847
Paul East	1977.702
John Macdonald	1963.95
HMN_WPB	1960.717
Terry	1958.17
Etienne Delangre	1953.277
Igor Bek	1950.654
dr. Eddie	1948.755
CHARLIE	1943.769
George Kissov	1939.233
Fran Swift	1937.915
Claude Martin	1934.89
Tamara de Grady	1934.634
Yves Costel	1932.314
Jan Stavast	1919.94
Alice Bayandor	1917.697
tom gilligan	1917.401
Kerostia	1908.042
David Boxley	1907.344
Paul Johnson	1901.998
tigo jean	1896.731
Mircea Kivu	1893.477
Jens Wamsler	1890.628
M. Hermsen	1889.144
GrantK	1886.875
Baile an Mhota	1885.929
Robert Pascal	1883.836
Ewac	1878.76
James Morgan	1876.963
Martin Keller	1876.542
Jacques Bakker	1873.376
gilles lacroix                         1872 Current Top Irish ....(over 1800) Karl Cashen  2190.279 Eamon Galligan  2032.851 B.J. O'Brien  2028.115 John Macdonald  1963.95 Fran Swift  1937.915 tom gilligan  1917.401 Jim Mullally  1868.631 billy ronan  1860.748 Maire O'Keeffe  1856.351 pat cassidy  1840.164 Patricia A Kelly  1829.433 Jeannie Fitzgerald  1817.604 Rick Crowe  1809.813