Event: Division 1

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Opponent Rating Result
Alan Richardson 1956 0 - 1
Stephen W Ruthen 1898 ½ - ½
Norman A Hutchinson 2044 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1699 = (5898 + 400 * (0 - 2)) / 3)

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