Event: John Ripley Handicap

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Opponent Rating Result
Isidro Cruz Gomez 0 0 - 1
M Connor 0 1 - 0
Roger G Williamson 2253 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

618 = (2253 + 400 * (1 - 2)) / 3)

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