Event: Division 5

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Opponent Rating Result
Stephen Morley 1428 1 - 0
Jonah Tomsett 1209 1 - 0
Alex Clements 919 ½ - ½
Sean Zhao 0 1 - 0
Ronald Watson 1395 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1150 = (4951 + 400 * (3 - 1)) / 5)

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