Event: Division 3

Opponent Rating Result
Thomas Weavin 1610 0 - 1
Ian D Jenkins 1312 1 - 0
David Horton 1182 1 - 0
Ian Webster 1446 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1588 = (5550 + 400 * (3 - 1)) / 4)

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