Event: C Division

Opponent Rating Result
Darren John Donnison 1443 0 - 1
Peter R Archer 1510 1 - 0
Peter McKay 1636 1 - 0
Graham W Matthews 1586 ½ - ½
Gordon Dickinson 1499 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1535 = (7674 + 400 * (2 - 2)) / 5)

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