Event: Silver Rook

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Opponent Rating Result
Dennis Browning 1911 0 - 1
Julia Nawalaniec 0 ½ - ½
Marek Zajaczkowski 1585 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

899 = (3496 + 400 * (0 - 2)) / 3)

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