Event: Ilkley Chess Club Championship

Opponent Rating Result
William Boothman 149 1 - 0
Lili Szasz 54 1 - 0
Chris Wright 168 0 - 1
Peter D Ward 0 ½ - ½
Stuart M Johnson 114 1 - 0
Robert Derrington 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

214 = (485 + 400 * (3 - 1)) / 6)

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