Event: Silver Rook

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Opponent Rating Result
Robert Pells 1705 0 - 1
John George 0 0 - 1
Dave Young 1383 1 - 0
Zhenia Belov 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

772 = (3088 + 400 * (2 - 2)) / 4)

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