Event: Doncaster League

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Opponent Rating Result
Peter Convery 153 0 - 1
Alan Bramall 148 0 - 1
Farrell P Clifford 138 0 - 1
Martin S Simmonds 135 ½ - ½
Anthony Perry 112 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-23 = (686 + 400 * (1 - 3)) / 5)

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Opponent Rating Result
Martin McGowan 91 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-309 = (91 + 400 * (0 - 1)) / 1)