Event: Club Challengers

Opponent Rating Result
Brian R Jeffery 1886 0 - 1
Matthew J Morter 1589 1 - 0
Graham R Jones 1536 ½ - ½
Chris Jones 1601 ½ - ½
Jim McAvoy 1752 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1753 = (8364 + 400 * (2 - 1)) / 5)

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