Event: Division 2

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Opponent Rating Result
Gavin Mullaley 1350 1 - 0
John E Fryer 1488 0 - 1
Peter Rose 1473 0 - 1
Jack T Smith 1270 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1395 = (5581 + 400 * (2 - 2)) / 4)

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