Event: Silver Rook

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Opponent Rating Result
Ismet Berisha 1713 0 - 1
Samiksha Yerabati 1313 1 - 0
Bertie Leatham 1224 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1283 = (4250 + 400 * (1 - 2)) / 3)

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