Event: Holmfirth POD Short League

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Opponent Rating Result
John Hill 0 ½ - ½
Vivien Webster 1679 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

640 = (1679 + 400 * (0 - 1)) / 2)

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Opponent Rating Result
Steve Harrington 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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