Event: Division One

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Opponent Rating Result
Max Walker 2030 0 - 1
Colin Purdon 2039 1 - 0
Derek R Johnson 1938 ½ - ½
David J Turner 1727 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1934 = (7734 + 400 * (1 - 1)) / 4)

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