Event: Ilkley - Silver King

Opponent Rating Result
Stuart M Johnson 1527 ½ - ½
John L Seppings 0 0 - 1
Patrick Ryan 1721 ½ - ½
David W Adam 1755 ½ - ½
C Barry Taylor 1633 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1247 = (6636 + 400 * (0 - 1)) / 5)

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