Event: Derby & District Division 1

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Opponent Rating Result
Paul Williams 1665 1 - 0
Martin Pettinger 2029 1 - 0
Martin Cobham 1752 ½ - ½
Ranjit Nath 1743 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1997 = (7189 + 400 * (2 - 0)) / 4)

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