Event: Ilkley Chess Club Championship

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Opponent	Rating	Result
Peter D Ward	0	0 - 1
William Boothman	149	0 - 1
Lili Szasz	54	0 - 1
Chris Wright	168	0 - 1
C Barry Taylor	135	0 - 1

performance = (sum(opponents ratings) + 400(wins-losses)) / games

-299 = (506 + 400 * (0 - 5)) / 5)