Event: Division 5

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Opponent Rating Result
Simon C Sellick 1570 1 - 0
Alan G Bice 1591 0 - 1
Alex Waters 1630 0 - 1
David Charters 1600 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1398 = (6391 + 400 * (1 - 3)) / 4)

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