Event: Division 5

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Opponent Rating Result
Daniel Walker 1411 0 - 1
Stephen Morley 1410 0 - 1
Stephen Humphreys 1499 0 - 1
Michael James 922 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1111 = (5242 + 400 * (1 - 3)) / 4)

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