Event: Ilkley - Silver King

Opponent Rating Result
Gerard P Killoran 2045 0 - 1
David W Adam 1755 ½ - ½
C Barry Taylor 1633 0 - 1
Robert Dennington 1634 ½ - ½
Trevor Murch 1777 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1609 = (8844 + 400 * (0 - 2)) / 5)

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