Event: Ilkley Chess Club Championship

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Opponent Rating Result
Stuart M Johnson 114 1 - 0
Lili Szasz 54 0 - 1
C Barry Taylor 135 0 - 1
Robert Derrington 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-124 = (303 + 400 * (1 - 3)) / 4)

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