Event: Summer League Division 4

Opponent Rating Result
Peter T Sharpe 1629 0 - 1
David Moore 1591 0 - 1
Robert Black 1584 1 - 0
Mark Kirkham 1484 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1372 = (6288 + 400 * (1 - 3)) / 4)

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