Event: Hepolite (Rapid Play)

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Opponent	Rating	Result
Phil Drury	135	1 - 0
Phil Drury	135	0 - 1
Les Johnson	127	0 - 1
Les Johnson	127	0 - 1

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

-69 = (524 + 400 * (1 - 3)) / 4)