Event: u1850 County Championship

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Opponent Rating Result
Gert De Block 1654 1 - 0
Tom Woodhouse 1662 0 - 1
Andrew Duffell 1581 1 - 0
Thomas Holmes 1354 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1763 = (6251 + 400 * (3 - 1)) / 4)

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