Event: Mini League

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Opponent Rating Result
Rupert W Jones 1815 ½ - ½
Jonathon Day 1517 0 - 1
Paul RH Clarke 1726 0 - 1
Ian Carrigan 1510 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1442 = (6568 + 400 * (0 - 2)) / 4)

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