Event: D&DCL Plate QP

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Opponent	Rating	Result
Joe Willgoose	1533	1 - 0
Max Geldstharpe	0	½ - ½
Owen Dale	1807	0 - 1
Craig Fores	1208	0 - 1

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

1037 = (4548 + 400 * (1 - 2)) / 4)