Event: Silver Rook

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Opponent Rating Result
Harry Carter-Sykes 0 1 - 0
Tim Appleyard 1177 1 - 0
Brad Slater 1722 0 - 1
Mariana Ferreira 1572 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1118 = (4471 + 400 * (2 - 2)) / 4)

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