Event: Division 3

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Opponent Rating Result
Sid McDonald 1407 0 - 1
Mark Webb 1422 1 - 0
Mike Angel 1456 0 - 1
Rob Davies 1351 1 - 0
David Wilshin 1350 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1477 = (6986 + 400 * (3 - 2)) / 5)

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