Event: Division 1

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Opponent Rating Result
David Armbruster 2102 0 - 1
J Robert Archer 1855 ½ - ½
Joel Tofield-Brown 1738 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1898 = (5695 + 400 * (1 - 1)) / 3)

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