Event: Doncaster League

Opponent Rating Result
Ian Farrow 1510 0 - 1
John Smart 1695 1 - 0
Andrew Butterworth 1963 1 - 0
Peter Convery 1888 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1764 = (7056 + 400 * (2 - 2)) / 4)

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Opponent Rating Result
T Ed Sowerby 1589 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1989 = (1589 + 400 * (1 - 0)) / 1)