Event: HDCA Summer League Section 2

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Opponent	Rating	Result
F Hal Jorna	118	0 - 1
David J Gibson	114	0 - 1
Peter Morgan	47	1 - 0

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

-40 = (279 + 400 * (1 - 2)) / 3)