Event: Rapid Play League

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Opponent Rating Result
Chris J Terrington 1911 1 - 0
Chris J Terrington 1911 1 - 0
Jonathon Day 1545 1 - 0
Jonathon Day 1545 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2128 = (6912 + 400 * (4 - 0)) / 4)

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