Event: Individual Quickplay

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Opponent Rating Result
John Thorley 1570 0 - 1
Graeme Boxall 1435 1 - 0
George Allen 1419 0 - 1
John L Clarke 1418 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1461 = (5842 + 400 * (2 - 2)) / 4)

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