Event: Watkinsons League

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Opponent Rating Result
Bryn W Charlesworth 1544 1 - 0
Alec Ward 205 0 - 1
Colin Frank 1700 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1150 = (3449 + 400 * (1 - 1)) / 3)

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