Event: Hepolite (Rapidplay)

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Opponent	Rating	Result
Lee Boyes	1625	1 - 0
Lee Boyes	1625	0 - 1
Bill Tait	1623	0 - 1
Bill Tait	1623	1 - 0
Peter D Rooney	2111	0 - 1
Peter D Rooney	2111	0 - 1
Barry Thompson	1525	0 - 1
Barry Thompson	1525	1 - 0

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

1621 = (13768 + 400 * (3 - 5)) / 8)