Event: Division 3

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Opponent Rating Result
James Irwin 1751 0 - 1
Michael Kowalczyk 1422 0 - 1
Stephen Spurgeon 1500 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1291 = (4673 + 400 * (0 - 2)) / 3)

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