Event: Summer Rapidplay

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Opponent	Rating	Result
Rhys Orton	1229	0 - 1
J Alan Stockley	1388	0 - 1
Sanjay Saggar	0	1 - 0

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

739 = (2617 + 400 * (1 - 2)) / 3)