Event: Worcestershire Challengers' League

Opponent Rating Result
David Smith 1801 ½ - ½
Scott Russell 1817 ½ - ½
Geoffrey M Herbert 1848 0 - 1
Stephen V Woodhouse 1894 ½ - ½
Ray A Collett 1877 0 - 1
Joe Rastall 1700 0 - 1
Joe Conway- Lees 1691 0 - 1
Julie C Wilson 1800 0 - 1
George Charman 1785 0 - 1
Phil Maddocks 1734 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1515 = (17947 + 400 * (0 - 7)) / 10)

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