Event: Roger Goldsmith Div 1

Opponent Rating Result
David Short 1754 1 - 0
Andrew Shephard 1874 ½ - ½
Stephen W Ruthen 1887 0 - 1
David Short 1743 1 - 0
Rod B Newbery 1761 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1884 = (9019 + 400 * (2 - 1)) / 5)

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