Event: Ilkley - Silver King

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Opponent Rating Result
Bill Tait 1696 1 - 0
John Link 102 0 - 1
Lee Crawford 1864 0 - 1
Trevor Murch 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

716 = (3662 + 400 * (1 - 3)) / 4)

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