Event: Div 1 - Davy Trophy

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Opponent	Rating	Result
Daniel Gottschalk	1976	1 - 0
John A Clark	1771	0 - 1
Robert Porter	1653	1 - 0
Xiaorui Wang	1401	½ - ½
Xiaorui Wang	1401	1 - 0
Brian Crofts	1577	½ - ½
Robert Porter	1653	1 - 0
Vasileios Pasialis	2018	0 - 1

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

1781 = (13450 + 400 * (4 - 2)) / 8)