Event: Division 2

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Opponent Rating Result
Barry R Smith 1539 ½ - ½
Emmet Clarke 1623 0 - 1
Joshua Sawyer 1519 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1560 = (4681 + 400 * (1 - 1)) / 3)

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