Event: D&DCL Div 2

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Opponent Rating Result
Philip Sheldon 1660 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1660 = (1660 + 400 * (0 - 0)) / 1)

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Opponent Rating Result
John Potter 0 0 - 1
Martin Pettinger 1728 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

464 = (1728 + 400 * (0 - 2)) / 2)