Event: Holmfirth POD Short League

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Opponent Rating Result
Les Johnson 0 0 - 1
Bryn W Charlesworth 0 ½ - ½
Joshua Lewis 1450 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

483 = (1450 + 400 * (1 - 1)) / 3)

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