Event: u1850 County Championship

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Opponent Rating Result
Peter Baddeley 1622 1 - 0
Ben Yelverton 1684 ½ - ½
Ed Kirkham 1748 ½ - ½
Stephen C Pride 1608 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1766 = (6662 + 400 * (1 - 0)) / 4)

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