Event: Division 3

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Opponent Rating Result
John Nevin 1518 0 - 1
George Robinson 1463 0 - 1
Bethany Irwin 1303 1 - 0
Mark Webb 1443 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1232 = (5727 + 400 * (1 - 3)) / 4)

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