Event: Ilkley - Silver King

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Opponent Rating Result
William Boothman 1763 ½ - ½
Robert Dennington 1582 1 - 0
John Link 102 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1416 = (3447 + 400 * (2 - 0)) / 3)

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