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Event: Withnall Trophy

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Opponent Rating Result
Stuart IE Green 74 ½ - ½
Grenville Cross 92 0 - 1
David E Shiers 116 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-39 = (282 + 400 * (0 - 1)) / 3)

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