Event: U1450 Championship

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Opponent Rating Result
Paul Mayer 1272 0 - 1
Ian Maskery 1433 0 - 1
Doris Pearce-Niederwieser 1234 1 - 0
Jan Oldham 1347 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1122 = (5286 + 400 * (1 - 3)) / 4)

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