Event: Summer League (Pool B)

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Opponent Rating Result
Robert Lacey 1467 0 - 1
Stephen Tatlow 1683 0 - 1
Robert Lacey 1467 1 - 0
Stephen Tatlow 1683 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1375 = (6300 + 400 * (1 - 3)) / 4)

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