Event: Peter-Div1TestingGrading

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Opponent	Rating	Result
David Bale	182	0 - 1
Bernard Pratten	146	1 - 0
Denis Georgiou	153	½ - ½

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

160 = (481 + 400 * (1 - 1)) / 3)