Event: Peter-Div1TestingGrading

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Opponent	Rating	Result
Steven Lewis	161	1 - 0
Denis Georgiou	153	1 - 0
Nicholas Louth	166	½ - ½

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

427 = (480 + 400 * (2 - 0)) / 3)