Event: Watkinsons League

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Opponent Rating Result
Alex Burke 1660 ½ - ½
James Wilton 0 1 - 0
Bryn W Charlesworth 1533 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1331 = (3193 + 400 * (2 - 0)) / 3)

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Opponent Rating Result
Dave Gray 1714 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1314 = (1714 + 400 * (0 - 1)) / 1)