Event: Hepolite (Rapid Play)

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Opponent	Rating	Result
Lee Crawford	149	0 - 1
Lee Crawford	149	0 - 1
C Barry Taylor	137	1 - 0
C Barry Taylor	137	0 - 1

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

-57 = (572 + 400 * (1 - 3)) / 4)