Event: U1800 Cup

Opponent Rating Result
Timothy J Wesson 1805 ½ - ½
Daniel Such 1559 1 - 0
Robert L Jones 1703 0 - 1
Mark Heffer 1685 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1688 = (6752 + 400 * (1 - 1)) / 4)

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