Event: Ilkley - Silver King

Opponent Rating Result
Trevor Murch 0 ½ - ½
Robert Dennington 1634 1 - 0
John Cleland 1610 ½ - ½
John L Seppings 0 ½ - ½
Patrick Ryan 1721 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1153 = (4965 + 400 * (2 - 0)) / 5)

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