Event: Max 480

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Opponent Rating Result
Peter W Leary 120 0 - 1
Scott Leadbetter 115 ½ - ½
Peter W Leary 120 0 - 1
Scott Leadbetter 115 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

18 = (470 + 400 * (1 - 2)) / 4)

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