Event: Division 3

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Opponent Rating Result
Simon Yates 1547 0 - 1
Peter Jones 1309 0 - 1
Rich Yates 1250 1 - 0
David (Abs) Bailey 1248 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1139 = (5354 + 400 * (1 - 3)) / 4)

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