Event: Silver Rook

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Opponent Rating Result
Kateryna Huk 1876 0 - 1
Isobel Stetter 1758 0 - 1
Anthony Ryland 1393 0 - 1
John Tate 1491 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1230 = (6518 + 400 * (0 - 4)) / 4)

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