Event: Harborough vs Kettering Friendly

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Opponent Rating Result
Robert Gibbison 1792 0 - 1
Robert Gibbison 1792 0 - 1
Omar Oliveri 1542 1 - 0
Benjamin Hodgkiss 1419 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1436 = (6545 + 400 * (1 - 3)) / 4)

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