Event: Open Rapid-play

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Opponent Rating Result
Ian Emery 1928 ½ - ½
Tony Preece 1868 0 - 1
Ian Emery 1928 ½ - ½
Tony Preece 1868 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1698 = (7592 + 400 * (0 - 2)) / 4)

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